Many power tools fail because ofmotor wear. Modern models of Bulgarians have a soft starter. Due to him, they are ways to work long. The principle of the element is based on changing the operating frequency. In order to learn more about the start-up device, it is worth considering the scheme of the standard model.
The standard scheme for the smooth start-up of a grinder consists offrom a triac, a rectifier unit and a set of capacitors. To increase the operating frequency, resistors are used, which pass current in one direction. The starter is protected by a compact filter. The nominal voltage of the models is kept low. However, in this case, much depends on the maximum power of the motor, which is installed in the Bulgarian.
Connecting the soft start of the Bulgarianis carried out through an adapter. Its input contacts are connected to the rectifier unit. It is important to determine the zero phase in the device. A soldering lamp is required to secure the contacts. Check the functionality of the starter can be through the tester. First, the negative resistance is determined. When installing the starter, it is important to remember the threshold voltage that the device can withstand.
The scheme of a smooth start of the Bulgarian, with their own handsmade, involves the use of contact resistors. The polarity coefficient of the modifications, as a rule, does not exceed 55%. Many models are manufactured with blockers. A wire filter is responsible for protecting the device. Transceivers of low frequency are used to transmit current. The process of lowering the threshold voltage is carried out on the transistor. The triac in this case acts as a stabilizer. When the model is connected, the output resistance at 10 A overload should be about 55 Ohm. Linings for starters are suitable on a semiconductor basis. In some cases, magnetic transceivers are installed. They are good at low speed and can maintain a nominal frequency.
Smooth start for Bulgarians with triacs at 15 AIt is universal and often occurs in low power models. The difference between devices is low conductivity. The scheme (device) of the smooth start of the Bulgarian suggests the use of contact type transceivers, which operate at a frequency of 40 Hz. Many models use comparators. These elements are installed with filters. Rated voltage of starters starts from 200 V.
Devices with triacs of 20 A are suitable forprofessional Bulgarians. Many models use contactor resistors. First of all, they are capable of operating at a high frequency. The maximum temperature of the starters is equal to 55 degrees. Most models are well protected. The standard design of the device involves the use of three contactors with a capacity of 30 pF. Experts say that the devices are distinguished by their conductivity.
The minimum frequency of the starters is 35 Hz. They are able to work in a DC network. Modifications are connected via adapters. For motors at 200 W, such devices are well suited. Filters are often installed with triodes. The sensitivity index for them is no more than 300 mV. Wired comparators with a protection system are quite common. If we consider imported models, then they have an integral converter, which is installed with insulators. The conductivity of the current is ensured at a level of 5 microns. With a resistance of 40 Ohm, the model is capable of stably maintaining high revs.
For 600 watt burners starters withcontact triacs, in which the overload does not exceed 10 A. It is also worth noting that there are many devices with overlays. They are distinguished by their security and are not afraid of high temperatures. The minimum frequency for Bulgarians at 600 Watts equals 30 Hz. The resistance depends on the installed transistor. If it is of the linear type, then the above parameter does not exceed 50 ohms.
If we talk about duplex triodes, thenresistance at high speeds can reach up to 80 ohms. Very rarely, models have stabilizers that work from comparators. Most often they are attached directly to the modules. Some modifications are made with wire transistors. They have a minimum frequency starting at 5 Hz. They are afraid of overloads, but are able to maintain high revs at a voltage of 220 V.
Bulgarians at 800 W work with starter switchesfrequency. Triacs are often used at 15 A. If we talk about the scheme of models, it is worth noting that they use expansion transistors, in which the current capacity starts from 45 microns. Condensers are used with and without filters, and the capacitance of the elements is no more than 3 pF. It is also worth noting that the starters differ in sensitivity.
If we consider professional Bulgarians, thenModifications of 400 mV are suitable for them. The current conductivity can be low. Also, there are devices with variable transistors. They heat up quickly, but they are not capable of supporting large revolutions of the Bulgarian, and the conductivity of the current is about 4 microns. If we talk about other parameters, the nominal voltage starts from 230 V. The minimum frequency for models with broadband triacs is 55 Hz.
Starters for these Bulgarians are produced intriacs with an overload of 20 A. The standard circuit of the device includes a triode, a stabilizer plate and three transistors. The rectifier unit is most often installed on a wired basis. Condensers can be used with or without a filter. The minimum frequency of the conventional model is 30 HZ. With a resistance of 40 Ohm, the starters are capable of supporting large overloads. However, problems may arise at low revolutions of the Bulgarian.
Make a smooth start with the triac TS-122-25 forBulgarians with their own hands is quite simple. First of all, it is recommended to prepare a contactor resistor. Condensers will require a single-pole type. A total of three elements are installed in the starter. The capacitance of one capacitor should not exceed 5 pF. To increase the operating frequency soldered contactor on the plate. Some experts say that it is possible to increase the conductivity through filters.
The rectifier unit is used with conductivity from50 microns. It is capable of withstanding large overloads and will be able to provide high revs. Further, in order to collect a smooth start-up on the Bulgarian with their own hands, a thyristor is installed. At the end of the work, the model is connected via an adapter.
Assemble on the Triac VS1 soft start forBulgarians with their own hands can be used with several rectifier units. Condensers for the device are suitable for linear type with a capacity of 40 pF. Begin the assembly of the modification is with the soldering of the resistors. Condensers are installed in series order between insulators. The rated voltage of a high-quality starter is 200 V.
Next, to make a smooth start for the Bulgarianwith your own hands, the prepared triac is taken and soldered at the beginning of the chain. The minimum operating frequency for it should be 30 Hz. In this case, the tester must display a value of 50 ohms. If there are problems with overheating of capacitors, then you need to use dipole filters.
To assemble with the regulator KR1182PM1 a smoothstart for the Bulgarians with their own hands, the contact thyristor and the rectifier unit are taken. It is more expedient to apply a triode to two filters. It is also worth noting that to build the starter will require three capacitors with a capacity of at least 40 pF.
The sensitivity index of the elements is obligedbe 300 mV. Experts say that the triac can be installed behind the lining. Also it must be remembered that the threshold voltage should not fall below 200 V. Otherwise, the model will not be able to work at lower speeds of the Bulgarian.</ p>