How to connect a power saw without a smooth start sensor. Modeling and measurement results

Smooth start for the end saw, what is it and how to do it with your own hands

Manufacturers offer a wide range of products in this category. For a simplified selection of a smooth starting device (UPP), it is enough to clarify the correspondence of the power of the consumption of a certain power unit and the number of phases that will change.

With a more thorough study of the issue, attention is paid to the value of the current of electronic keys. It is chosen several times more than a similar working parameter of the engine (take a value for the average rotor speed)

The reserve for this position is determined taking into account the characteristics of the equipment. In pumping equipment, for example, there is quite enough excess by 250-300%. For sawmills, where loads increase very quickly, a multiplier is suitable from 7 to 11.

Note. Separately check the completion cycle and the frequency of operations. With increased loads for sufficiently fast cooling, more powerful thyristors are required. Effective passive and active cooling systems with radiators are also used.

The simplest electronic circuits increase the voltage at the output for a certain time interval to the calculated level. In modern circuitry, feedback is used with the control of the phase shift of the moment, other parameters. Such additions complicate the equipment. However, automated control performs its functions more accurately taking into account the real conditions. In addition to blocking dangerous modes, economic operational parameters improve.

Other important nuances are given in the following list:

• Special shunting of the main regulator key simplifies maintaining the optimal temperature regime;
• digital control is characterized by increased accuracy;
• To set the desired parameters, an built.in indicator display is useful;
• Some models can be connected to external devices to solve the problems of automation of control and adjustment.

For the correct choice, responsible manufacturers cite expanded information in the descriptions (example):

• purpose. asynchronous electric engines;
• Recommended scope. fans, pumping equipment;
• the number of adjustable phases. 3;
• Power network parameters-220-420 V with an acceptable error of 10%;
• The power of the electric motor is 40/76 kW for a voltage of 220/400 V, respectively;
• Factory setting on current. 130a;
• Features of the starting regime. control of the moment using feedback and current restriction;
• management. discrete digital or analogue;
• The power of the controlled circuit consumption is 15 watts;
• Signals at the digital output: anxiety, shutdown, stop, start, work;
• the speed of transmission of the signals of the information channel. from 4800 to 19200 bits/s;
• Blocking: a cliff of phase chains, an excess of the temperature threshold with the control of the electric motor (starter);
• Cooling of the device. convection;
• compliance with the IEC 60947-4-2 protocol levels of electromagnetic interference;
• resistance to vibrations with an amplitude of 1.5 mm at a frequency of 2-13 Hz;
• noise during operation. no more than 55db;
• working temperature range. from.10 ° C to 40 ° C.

The above description demonstrates that, in addition to the main technical data, it is necessary to take into account real operating conditions. Thorough preparation increases durability, prevents unnecessary cost of repair work.

Connecting a typical unit for a smooth launch of power tools

Data on the purchase expenses given in the summary table is easy to update. In this example, they demonstrate a relative change in value depending on the technical characteristics. The fame of the brand is certain in this comparison.

Making a smooth start socket

The most important requirement for such a socket is its mobility. Therefore, you will need a carrying.

With it, it will be possible to smoothly start the tool anywhere. in the garage, in the country, during the construction of your house in different areas of construction site.

First of all, the carrier needs to be disassembled.

The main food wires in it can be either soldered or connected on screw clamps.

Depending on this, your additional outlet will also be connected. This should be an additional socket near the carrying, in order to be able to simultaneously connect the tool in different modes.

By the way, if you mistakenly turn on the corner grinder or circular, having a factory built.in smooth start in a socket, also equipped with such UPP, then everything will work surprisingly. The only moment is that you get a delay in the launch of a saw or a disk revolution for a couple of seconds, which is not very convenient in work and can puzzle without a habit.

Here are the real trials of such a connection conducted by one master from YouTube Barmaglot777. His commentary after such tests on the Dremel type engrave, Bosch drill, Makita milling cutter, Interskol circular saw:

Next, for assembling the outlet, take a multi.core copper wire with a section of 2.5mm2 and clean its ends.

After that, it is necessary to carry the contact site on the carrying where this wire will be soldered.

Reliably solder the cable veins to these sites.

Carefully lay the wires and close the extension cord.

Take a square outer outlet for installation on the outer surface of the walls, and in its case try on a smooth start unit. Since it has compact rectangular dimensions, it should fit there without any problems.

Mount and fix the gourder of the outlet on the same site with an extension cord.

PP unit connect to the rupture of any wire, phase or zero. Do not confuse, the phase and zero are not supplied to it at the same time.e. 220v.

It is installed on one of the wires.

Also for this BPP, there is no difference from which side to make the entrance, and with what exit. Twisters plow and isolated by thermal shrinkage.

After that, all the inside of the sockets are going to the case and it remains to close the entire structure with a lid.

This is where the whole alteration of the carrying and manufacturing of the outlet can be considered completed. In time it will take you no more than 15 minutes.

How to make a starter from the TS-122-25 Simistor?

Make a smooth start for corner grinders with your TS-122-25 TS-122-25. First of all, it is recommended to prepare the contact resistor resistor. Capacitors will require a single.pole type. In total, three elements are installed in the starter. The capacity of one capacitor should not exceed 5 pf. To increase the operating frequency, the contactor on the lining is soldered. Some experts say that you can increase conductivity thanks to filters. The rectifier unit is used with a conductivity of 50 μA. He is able to withstand large overloads and will be able to provide high speeds. Next, to collect a smooth start for an angular grinder with your own hands, a thyristor is installed. At the end of the work, the model is connected through the adapter.

If the tool is not equipped with a speed regulator, then he does not need it. The corner grinder, for example, is always used at full speed, otherwise it becomes dangerous. Why such a power tool for a smooth start? There are many reasons, because the sharp start of the engine of the same grinder or electric fugank causes:

• burnout of the brushes and lamps of the rotor;
• current blow in the mains;
• The instrument attempt to break out of the hands, which is unsafe;
• A strong trigger of the gear of the gearbox against each other, causing their quick wear.

With smooth starting, neither current nor mechanical impact will occur. The engine of the power tool will smoothly start and go to maximum speed.

Making a smooth start

The scheme is assembled on a printed circuit board with dimensions of 45 x 35 mm, the board is divorced as compact as possible so that it can be built into the body of the tool, which requires smooth start. It is better to solder the power wires directly into the board, but if the load power is small, then you can install terminals, as I did. The board is made by the Lut method, the process photos are presented below.

It is advisable to tie the paths before the sinking of parts, so their conductivity improve. The microcircuit can be installed in the panel, then it can be removed without problems from the board. First, resistors, diodes, small capacitors are sealed, and later the largest components. After completing the assembly of the board, it must be checked for the correct installation, call the paths, wash the remaining flux.

The simplest scheme

UPP with the regulation of revolutions on the thyristor KU 202 has been widely used due to a very simple execution scheme (Scheme 1). Its connection does not require special skills. Radio elements for him to get it very simple. This model of the regulator is made of a diode bridge, a variable resistor (acts as a regulator U) and the tiristor setup circuit (feed U to a 6.3.volt number control exit) of a domestic manufacturer.

Due to the size and number of parts, the regulator of this type can be built into the power tool case. In addition, the handle of a variable resistor should be removed and the revolution regulator itself can be finalized by integrating the button in front of the diode bridge. The basic principle of operation is to adjust the revolutions of the instrument electric motor due to restriction of power in manual mode. This circuit allows the use of power tools with a capacity of up to 1.5 kW. To increase this indicator, it is necessary to replace the thyristor with a more powerful one (information about this can be found on the Internet or a directory). In addition, it is necessary to take into account the fact that the thyristor control scheme will differ from the original. KU 202 is an excellent thyristor, but its significant drawback is to set it up (a selection of parts for the control scheme). To make a smooth start in automatic mode, scheme 2 (SCP on the microcircuit) is used).

How to make a smooth start yourself

Due to the simplicity of the scheme, the device of smooth starting the electric motor on the simistor is not difficult to assemble. It is made from available details. It is best to do it on the printed circuit board, so nothing will hang out and close. Simistor needs to be fixed on a heat heating radiator made of aluminum. It is better if it is a factory radiator designed for a power of 10-30 watts. Then it is suitable for power tools with a capacity of 1000-1200 watts.

The calculation of the radiator is very easy to calculate by current. About 1 falls on the Simistor.5-2 volt voltage when it is open. We get the current division of power into network voltage. For example, a power tool with a rated capacity of 1200 W: 1200/220 = 5.45 amperes. Multiply by 2, we get 11 watts.

Typically, in a selling power tool, the power restriction circuit is hidden somewhere in the handle or corner of the corner grinder or drill. There is no way to place a normal radiator. With frequent starting, it overheats and does not perform its functions. Only a good professional power tool has a normal device to limit the starting moment and speed control.

Note: The module of smooth starting for power tools is best made in a box with a socket. Do not take too small outlet boxes too. It is difficult to place a normal radiator for the simistor there. Without a radiator from the device there will be no practical benefit! When assembling a radiator with a device, it is necessary to ensure the purity of mating surfaces and a thin layer of thermal conductive paste (KTP-8 or an import analogue).

The radiator must be fixed on the same board on which the rest of the details are collected. The board is placed in a box of suitable size and quite strong. Such boxes can be bought in electrical goods or made from sheet plastic. A clean empty can of glue, paints with a screw or tightly closing lid may come up. It should be strong and unprecedented.

The socket mounted in the device should be designed for the rated current of the used electric motor. A similar story with a network cord.

IMPORTANT! If the power tool is equipped with a speed regulator, its handle should be securely isolated. The device is under voltage of the network and may turn out to be source of current in case of poor insulation.

It is useful to cover the printed circuit board after installation with nitrolak to protect against moisture. The principal scheme and the analysis of its work in the next section.

Smooth launch on the KR1182PM1 microcircuit

This is a microcircuit for production power tools that is produced by NTC SIT CJSC (g. Bryansk). It can be purchased in retail in many online stores. Also the new name K1182MP1R.

The microcircuit can be used without an external simistor during the operation of an electric motor for a load of up to 150 watts. This is too little for the power tool, but you can use a more powerful simistor, which will increase the control power to 1-1.5 kW. The scheme with its use is shown below:

Inside the chip is the control signal amplifier. This signal is formed at conclusions 3 and 6 of the microcircuit. The phase of unlocking the systemist is proportional to the voltage between conclusions 3 and 6, which can change in the range from 0 to 6 V. At zero, the load is disabled. When turning on, the capacitor actually accurately closes the control circuit. But it is quite quickly charged and this forms the smoothness of acceleration.

The resistor R1 allows the capacitor C1 to reduce pauses between inclusion faster. With full voltage, the load works with a power close to the nominal. This voltage is created by the microcircuit itself, and the external circuit only “shakes” it in order to influence the phase of the backbone of the systemist in each semi.period of the network voltage.

S1 switch can be used instead of a switch operating in the break in the network circuit. Only it works the other way around, when opening, the electric motor starts, and when the closure is disconnected. The current in the circuit of this switch is very small and you can use any microswitch. However, there should be a way to quickly turn off the power tool in any case! That is, you can’t do without an emergency network switch.

The use of a variable resistor in place R1 will more or less smoothly adjust the speed of the electric motor. Such a function, in addition to the smooth start, can be very useful when working with various materials that require their processing speed.

Typically, the time of the smooth start of the tool can be limited in the range of 0.thirty.5 sec. This provides a significant increase in the service life of the device. If the power tool is powerful and resourceful, it can unexpectedly tear it out of the employee’s hands with all unpleasant consequences. In such cases, you need an even more smooth start. You can choose a suitable dispersal delay using a graph shown below:

These data were obtained in the NGSPICE program based on the characteristics taken from the manufacturer’s documentation. In addition, they were tested in practice, with a 1500 W corner grinding machine and showed a good coincidence.

Simistor VS1 can be taken as BT139-600 (Philips), TS106-10-6 (SZTP), BTB10-600BWRG (ST Microelectronics) or other similar. Type K50-35 capacitors for operating voltage 50 V, with a capacity of 1 MF (C2.3) and 5-100 MF for C1. Resistor R2 Type MLT-0.5. It is also advisable to use a rated current fuse, which is 15-20% higher than the rated current of the estimated load, it is desirable in the circuit.

An example of installing a smooth launch of an electric motor on an angular grinder:

other methods

Among other methods of smooth start for power tools, the use of transformers can be noted. For example, there will be a rather universal Latra for 1-1.5 kW. Although this is a rather heavy device, it can help out if it is at hand, then you will not have to collect another device.

Starters for Bulgarians with a 20 A systemist

Devices with simistors at 20 A are suitable for professional Bulgarians. Many models use contact resistor resistors. First of all, they are able to work at a high frequency. The maximum temperature of the starters is 55 degrees. Most models are well protected by the case. The standard device scheme involves the use of three contrasts with a capacity of 30 pf. Experts say that the devices are distinguished by their conductivity.

The minimum frequency of starters is 35 Hz. They are capable of working on a direct current network. Connection of modifications is carried out through adapters. For 200 W engines, such devices are well suited. Filters are often installed with triodes. The sensitivity indicator in them is no more than 300 mV. Quite often there are wired comparators with a protection system. If we consider imported models, then they have an integral converter that is installed with insulators. Current conductivity is provided at the mark of 5 MK. With a resistance of 40 Ohms, the model is able to steadily maintain large speeds.

DIY corner grinder

Everyone who has been using a corner grinder for more than one year, it broke. At first, each master tried to repair a grinding machine sparkling with sparkles on his own, hoping that it would work after replacing brushes. Usually, after such an attempt, a broken tool remains on a shelf with burnt windings. And a new corner grinder is bought to replace.

Drills, screwdriver, peorators, milling mills are mandatory equipped with a speed set regulator. Some so.called calibration grinders are also equipped with a regulator, and conventional corner grinders have only a power button.

Low.power corner grinder manufacturers do not complicate additional schemes intentionally, because such a power tool should be cheap. Of course, it is clear that the service life is always shorter than that of a more expensive professional.

The simplest corner grinder can be modernized, so that it will cease to be damaged by the gearbox and winding wires of the anchor. These troubles mainly occur with a sharp, in other words, shock starting corner grinder.

All modernization is only in the assembly of an electronic circuit and fix it in the box. In a separate box, because there is very little space in the handle of grinders.

Proven, working scheme is laid out below. It was originally intended to adjust the intensity of lamps, that is, to work on an active load. Its main advantage ? simplicity.

• The highlight of the device of the smooth start, the circuit of which you see, is the chip K1182PM1R. This microcircuit is highly specialized, domestic production.
• Acceleration time can be increased by choosing a capacitor C3 of a larger capacity. During the loading of this capacitor, the electric motor is gaining momentum to the maximum.
• No need to put variable resistance in return for resistor R1. A 68 kOhm resistor is optimally selected for this scheme. With this setting, you can smoothly start the angular grinder with a capacity of 600 to 1500 watts.
• If you are going to assemble a power regulator, then you need to replace the resistor R1 with variable resistance. Resistance of 100 kOhm, and more, does not underestimate the output voltage. By closing the legs of the microcircuit, you can completely turn off the connected corner grinder.
• By inserting the semiistor VS1 of the TS-122-25 type, that is, 25A, you can smoothly start almost any grinder available for sale, with a capacity of 600 to 2700 watts. And there remains a large supply of power in case of jamming of grinding. For connecting Bulgarians with a capacity of up to 1,500 watts, enough imported seven.historians BT139, BT140. These less powerful electronic keys are cheaper.

The seven.ITOR in the above circuit does not completely open, it cuts off about 15V network voltage. This voltage drop does not affect the work of a corner grinder. But when heated by the seven.source, the revolutions of the connected tool are greatly reduced. This problem is solved by installing the radiator.

This simple scheme has another drawback. its incompatibility with a speed regulator installed in the tool.

The collected scheme must be hidden in a plastic box. The case made of insulating material is important, because you need to protect yourself from network voltage. You can buy a distribution box at the electrical goods store.

A socket is screwed to the box and a cable with a fork is connected, which makes this design outwardly similar to an extension cord.

If experience allows and there is a desire, you can collect a more complex scheme of smooth start. The scheme below is the standard for the XS.12 module. This module is installed in the power tool in factory production.

If you need to change the speed of the connected electric motor, then the circuit is complicated: tuning is installed, for 100 kOhm, and an adjusting resistor for 50 kOhm. And you can simply and roughly introduce 470 kOhm.lump change between a 47.lump resistor and a diode.

In parallel to the capacitor C2, it is advisable to connect a resistor with a resistance of 1 MOM (it is not shown in the diagram below).

The supply voltage of the LM358 chip is in the range from 5 to 35V. The voltage in the power circuit does not exceed 25V. Therefore, you can do without additionally dz zener di.

Whatever the scheme of smooth starting, never turn on the tool connected to it under load. Any smooth start can be burned if you rush. Wait until the corner grinder is spinning, and then work.

Appointment

The corner grinder was originally created to grind surfaces. But due to significant modernization of the design, it quickly began to perform such useful functions as cutting and processing of any building materials, including cement, concrete, brick, tile, slate and all types of metals.

According to the methods of performing work, an angular grinder, like the entire power tool, is created for operation in one of two modes:

• constant work in construction conditions with overcoming maximum loads during a full work shift. professional models;
• For single use with the organization of breaks in nominal loads. household tools.

This is one of the important differences must be taken into account when buying. It affects the cost of corner grinding.

Professional models

For the tool to work for a long time in extreme conditions and at the same time convenient manufacturers use all kinds of technical tricks. For example, slightly reduce the dimensions of the engine and its weight for windings of the stator and rotor allows the isolated copper wire not the usual round section, but in the shape of a square.

Even the composition of the plastic for the case is selected such a design that when it is heated up to 140 o, it does not transmit the high temperature to the operator’s hands and at the same time does not lose its strength.

• vibration protection inserts on handles that prevent the development of occupational diseases;
• Quick.sounding SDS nuts that allow you to install the working organs without using a special key;
• rotary rear handle;
• the rotation function of the gearbox or the ability to rearrange the front handle in one of the three provisions;
• a special design of bearings, ensuring the balancing of the working body;
• long power cord with a protective layer of strong insulation;
• the possibility of regulating the number of revolutions of the working circle and a number of other useful functions.

Household tool

Corner grinder of this class is inferior in their characteristics to a professional tool. However, they are produced according to strict technical standards, meet security standards, allow you to perform work in compliance with breaks.

Features and service life

In manual power tools, such as: angular grinder (angular grinder), circular saw, electric screwdriver, drill. collector engines with sequential excitement are used. They can work on constant and on alternating current.

In most cases, a regular power grid 230 in 50 Hz is used to write them down in most cases. Previously, a network of 380 in a professional tool was used. Now, with the growth of consumer power in single.phase networks (offices and residential sector), professional power tools for 220 in.

Collector engines have a large torque and starting moments, compact, are easily made for increased voltage. The torque here is a decisive. With a low mass of the machine, it is just suitable for manual power tools. But such electric motors have disadvantages and weaknesses. One of these weaknesses is the brush knot.

Brushes from pressed graphite with fillers rub on the copper plates of the collector and are subjected to mechanical wear and electricity. This leads to an increase in sparking and increases the fire and explosion hazard of the power tool. Mineral dust getting inward accelerates wear. Although the fans provided for by the design blow air out, dust and cement can easily get inside. During downtime, if the tool was unsuccessfully laid, dust easily gets inside. In practice, this is a constant phenomenon.

Brushes of an electric motor from pressed graphite

Another drawback of the power tool is frequent breakdowns of the gearbox. This happens just due to a large starting moment. The advantage turns into a disadvantage. With a breakdown of the gearbox, you have to change the tool, they usually are not subject to repair. Unfortunately, industry, in an effort to reduce the cost of products, does this due to the quality. If you want to use a good power tool. pay a lot of money.

Starters for Bulgarians with a 20 A systemist

Devices with simistors at 20 A are suitable for professional Bulgarians. Many models use contact resistor resistors. First of all, they are able to work at a high frequency. The maximum temperature of the starters is 55 degrees. Most models are well protected by the case. The standard device scheme involves the use of three contrasts with a capacity of 30 pf. Experts say that the devices are distinguished by their conductivity.

The minimum frequency of starters is 35 Hz. They are capable of working on a direct current network. Connection of modifications is carried out through adapters. For 200 W engines, such devices are well suited. Filters are often installed with triodes. The sensitivity indicator in them is no more than 300 mV. Quite often there are wired comparators with a protection system. If we consider imported models, then they have an integral converter that is installed with insulators. Current conductivity is provided at the mark of 5 MK. With a resistance of 40 Ohms, the model is able to steadily maintain large speeds.

Models for corner grinder 600 watts

For 600 watts, starters with contact simistors are used for 600 watts, in which the overload does not exceed 10 A. It is also worth noting that there are many pads with linings. They are secreted by security and are not afraid of elevated temperature. The minimum frequency for 600 watts is 30 Hz. In this case, the resistance depends on the set triodes. If it is used a linear type, then the above parameter does not exceed 50 Ohms.

If we talk about duplex triodes, then resistance at high speeds can reach 80 Ohms. Very rarely, models have stabilizers who work from comparators. Most often they are attached immediately to the modules. Some modifications are made with wired transistors. Their minimum frequency starts from 5 Hz. They are afraid of overloads, but are able to maintain high speeds at a voltage of 220 V.

Why do you need lightweight starting to the power tool

The smooth start scheme is a small assembly of a total of 5-6 electronic components based on a powerful semiconductor with control from the chip. The dimensions of such a board allow you to place it directly in the handle of the power tool, but modernization is not always promising due to the need to maintain a guarantee from the manufacturer, as well as the possibility of using such a device for various tools. The launch scheme can be made yourself according to several options for drawings from the Internet, but the easiest way for ending or drill are already used ready.made blocks offered in sale. They have many modifications, which requires an understanding of the principle of soft starting and the benefits received.

Slowed launch is primarily necessary to end peeling, which are not equipped with an engine speed adjustment unit. It is advisable to make a smooth launch of the tool with your own hands for a number of reasons:

• The launch of a powerful electric motor leads to significant jumps in the mains (peak throws), which negatively affects as a tool, that and the wiring. Alternative sources of electricity, as generators and inverters, are overloaded in such a situation and either turn off in automatic mode, or may fail. Starting through a special module significantly reduces the peak of a voltage throw, which excludes the probability of overload in the entire circuit.
• The ending without smooth starting quickly fails due to accelerated grinding of brushes, as well as the occurrence of an electric arc between the contacts, which creates the burnout of the anchor lamella and causes a short circuit of windings of the rotor and stator. The engine dramatically gains momentum, which with significant diameters of the saw leads to large inertial forces that affect the displacement of the tool not only in the hands, but even on stationary fasteners. Such a sharp launch can lead at least to cutting the material in an unplanned place, at a maximum. pulling out the ending from the hands or fastening with the probability of an accident. Installing a small block eliminates such problems.
• The slowed down the rotor acceleration at the end saw provides not only its safe operation, but significantly extends the service life, since at the time of the launch, shock loads disappear in the mechanical part of the tool. The gears do not fight among themselves in the programs, and the torque is correctly distributed without destructive consequences, which significantly reduces the mechanical production of the node.

With your own hands

To make the smooth launch of the ending, you can use one of the popular methods:

• Collect the electronic circuit yourself according to the drawings proposed on the Internet. This method is more suitable for lovers of electrical work, as knowledge and skills are needed to select components and debug electronic assemblies. Details are purchased strictly according to the required parameters (nominal nominal), and their dimensions are important to minimize the mounted fee. Do not forget that the block will operate under high voltage, so the quality of the soldering and the overall installation must meet the rules of electrical safety. For this reason, the method is not suitable for the average home master.
• Purchase a specialized unit unit (BPP) and connect it to the power tool. To ensure soft start for various household devices with electric motors, it is recommended to place the purchased block in an extension cord or carry. But, it is worth considering that there are several options for factory modules for slow acceleration, and they are not interchangeable.

The described method is suitable only for collector engines, it does not work with asynchronous, they have a different principle of excitation of the winding and a completely different device is required to adjust the starting. BPP is designed to connect only one consumer, simultaneously connecting several devices is unacceptable.

Electronic assemblies for slow launch are produced in several modifications and with various technical parameters. The conductive power can be from 10 to 50 A and selected on the basis of consumer data, while the dimensions of the assembly are inconsistent. For the modernization of the ending with your own hands, it is recommended to use blocks with a reserve with a reserve, this facilitates the working mode of the general circuit and makes it possible to connect consumers of greater power. The most common BPPs are considered at 16 A, suitable for electric motors up to 3 kW. this is the maximum power for household electrical tools.

BPP differ in structure and method of connection:

It cannot be connected according to the above principle, as it has a control conductor, the voltage supply to which leads to the flow of a power current between the other two contacts, which should lead to the launch of the engine. Such modules are mounted inside manual power tools (ending) with connecting the control wire to the launch button. An attempt to connect outside the household appliance requires the installation of a separate button, and the starting key on the tool should be blocked in the position on, which is extremely inconvenient for operation in the ending of the hands. Other connection options do not give the effect of smooth start, and the BPP remains under constant voltage, unsafe and ineffective. Such a model of blocks can be used to adjust the rotor speed, and the control wire is connected through alternating resistance (resistor), which performs the function of the regulator.

Connects to the rupture of the circuit, that is, in one of the wires that feed any collector engine. The effect of a slow set of revolutions occurs due to a short.term decrease in the starting voltage without a decrease in the passing current, which provides a soft, but confident launch. It is these blocks that can be mounted both in stationary and portable sockets, and the inclusion button on the end saw retains its functionality.

BPP with three contacts are suitable only for stationary power tools, for manual household appliances, blocks are used only with two wires to connect.

Mobile light launch of the tool

The easiest option for organizing a smooth start for various manual power tools is the installation of BPP in an extension socket, because its completely voluminous case has enough space for even the most powerful block. Modernization does not take much time and effort:

Features and service life

In manual power tools, such as: angular grinder (angular grinder), circular saw, electric screwdriver, drill. collector engines with sequential excitement are used.

They can work on constant and on alternating current.

In most cases, a regular power grid 230 in 50 Hz is used to write them down in most cases. Previously, a network of 380 in a professional tool was used. Now, with the growth of consumer power in single.phase networks (offices and residential sector), professional power tools for 220 in.

Collector engines have a large torque and starting moments, compact, are easily made for increased voltage. The torque here is a decisive. With a low mass of the machine, it is just suitable for manual power tools. But such electric motors have disadvantages and weaknesses. One of these weaknesses is the brush knot.

Brushes from pressed graphite with fillers rub on the copper plates of the collector and are subjected to mechanical wear and electricity. This leads to an increase in sparking and increases the fire and explosion hazard of the power tool. Mineral dust getting inward accelerates wear. Although the fans provided for by the design blow air out, dust and cement can easily get inside. During downtime, if the tool was unsuccessfully laid, dust easily gets inside. In practice, this is a constant phenomenon.

Brushes of an electric motor from pressed graphite

Another drawback of the power tool is frequent breakdowns of the gearbox. This happens just due to a large starting moment. The advantage turns into a disadvantage. With a breakdown of the gearbox, you have to change the tool, they usually are not subject to repair. Unfortunately, industry, in an effort to reduce the cost of products, does this due to the quality. If you want to use a good power tool. pay a lot of money.

With the latest drawback, you can just effectively fight with a smooth start. Many manufacturers do this, but do not always pay enough attention to this. Not all tools have good revolutions.

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I would not advise. The smooth start not only removes the jerk on his hands, but also a throw of current at the time of inclusion. I have many rotors in the power tool due to the intra.similar cliff. And they just arise due to a throw of the current. I am where the smooth start, or the regulator on the trigger stands. not a single. And throw it out simply. the wires from the engine directly to the switch. To be more precise, pictures of insides are needed.

Use in corner grinding

During the launch of the angular grinding machine (angular grinder), high dynamic loads appear on the details of the tool.

Dear models are equipped with UPP, but not ordinary varieties, for example, an angular grinder of Interskol. An inertial jerk is able to tear out a corner grinder from the hands, while a threat occurs to life and health. In addition, when starting the instrument electric motor, the current is overloaded and, as a result of this, the wear of the brushes and significant heating of the stator windings, the gearbox wear out and the destruction of the cutting disk, which can crack at any time and cause harm to health, and maybe even life. The tool needs to be secured and for this you should make an angular grinding grinder with a speed of revolutions and smooth starting with your own hands.

Is it worth it to throw a smooth start on the circular, not a corner grinder/pshm.

Modification for Interskol Bulgarians with a 15th simystor

Smooth start for the device with Simistors for 15 A is considered universal and is often found in types of low power. The difference between devices is small conductivity. The scheme (device) of such a start involves the use of transceivers of a certain type, which operate at a frequency of forty Hz. Many species use comparators. Such details are placed with filters. The nominal voltage for starters starts from 200 in.

Starters for Bulgarians with a 20 A systemist

Devices with simistors at 20 A are suitable for pro Bulgarians. Many species use special resistors. First of all, they can function at a high frequency. Max temperature of starters is fifty.five degrees. Most devices are perfectly protected by the case. The classic scheme involves the use of 3 contrasts with a capacity of thirty PF. Masters believe that the devices stand out by their conductivity.

• The smallest frequency for starters is about thirty-five Hz. They can function on a direct current network. The connection of the model is carried out through adapters. For two hundred WT engines, such devices are perfect. Filters are very often placed with triodes. Their sensitivity indicator is 300 mV and no more.
• Quite often, special comparators with a protection system may meet. If you disassemble foreign models, then they have an integral converter that is placed with insulators. Current conductivity is at the mark of five MK. With a resistance of forty Ohms, the model can keep large speed for a long time.

Models for corner grinder 600 watts

• For 600 watts tools, starters with contact simistors are used, they have a overload not higher than ten. Also remember that there are many linings. They are good for their security and will not be in fear of increasing the temperature regime. Min Frequency for 600 W devices is 30 Hz. In this case, the resistance will depend on the set triodes. If it is used a linear type, then the above parameter does not exceed 50 Ohms.
• If you talk about the duplex triodes, then resistance at serious revolutions can reach 80 Ohms. Very rarely, models may meet stabilizers who work from comparators. In most cases, they are fixed immediately to the modules. Some species are created with wired transistors. They have the smallest frequency starts from five Hz. They are afraid of overload, but can maintain huge revolutions at a voltage of 220 volts.

Bulgarian devices for 800 volts

800 watts can function with small frequency starters. Simistors are often used for fifteen A. If you disassemble the models scheme, it should be noted that they use special transistors in which the current throughput starts at 45 μA. Capacitors are used with and without filters, and the capacity of the parts is no more than three PF. It is also worth knowing that starters may differ in sensitivity. Corner grinder with speed adjustment and smooth start. Corner grinder Makita GA5030. Corner grinder “Makita” with speed control is one of the most popular models. The range of rotation adjustment will be completely dependent on the maximum diameter of the nozzle.

Remember that there is a high probability of breakdown of the electric motor and breakdown of the device after it is not soft, starting, but sharp, jerking. Therefore, it is better to make a limiter, making restrictions you can directly protect the engine. The device should also have a collector engine, and not asynchronous, so that everything can be safely disconnected. The block is needed for the supply of power to the switching relay.

Well, most importantly, the start button should be correctly installed, and even better look at the electric circuit before creating your own device. Repair of models KR1182PM1, XS, 12, D3, it is better to perform carefully, because such devices are expensive.

Rules for the safe use of chain electric saws

Valmemst. Yes, this is clear, just Belk ordered a two-wire unit from DP 2000M for use in an extension cord, in a socket, and what will come to him-xs

I told you how to do it.Don’t listen to anyone, people love to inflate from scratch.I put it in Makit, the brake stopped working for me, but I have another switch and you should have everything ok!

Falkon58. this is the scheme you have! I just redrawed from the block. I’m lying around.

userdb74. Or maybe you should not capture? (it’s hard to read)

Makita has a full.time fluid, so the brake with a three.year.old will not work.

And they are the same in size? You can ask for sizes here to lay out?

p/n stands to the button, as if it is not dependent on it.

And after all, stands in the pen, without any blow. Although, if the sawdust is blown there, it means that there is blowing.

eat a big hole in the stator

Alteration of charging devices and not only

I agree, but what would the brake work (with a three-year-old PP) need to replace the button, the whole thing is in contacts 1-2-3.

This is already a completely collective farm. It’s easier to apply a two.year.old PP and change nothing.

Kvost. If the third output of the block with point 2 is connected, it seems to be a smooth start and brake to work.

I agree. but not always desires coincide with the possibility. well, I did not find a two.year.old one, but I was tired of bouncing, that’s why I did it.

Explain? When the button is released, the brake winding is connected, absolutely as with a regular turning on, why not?

Thanks to! Connected. everything works. PP is, brake too.

But, damn it, barely collected everything. To disassemble the handle, I had to spin the half.piles. Perverted what is the design.

The PP unit is included in the rupture of the orange wire from contact 2. And everything is not working.

But, damn it, barely collected everything. To disassemble the handle, I had to spin the half.piles. Perverted what is the design.

I wished you from the heart! If you need anything, get back to me.I haven’t done it yet, in the German machine, the programmer from hell knows what (4 years are normal flight): yu. True, without half a liter could not do. (joke!) use health.

Will never be. But it is necessary as in the diagram, in the gap of the gray wire. And if the block is three.pin, then the third wire of the block is additionally connected to the second contact of the button.

or we are talking about different schemes.Or I’m a fool.where did you see the contact (normally open) in the gray wire? PP will not work with such a connection, it is already when it was included in the outlet.Already worked.