Many power tools fail due tomotor wear. Modern models of Bulgarians have a soft start device. Due to it, they are ways to work for a long time. The principle of operation of the element is based on changing the operating frequency. In order to learn more about the device start, it is worth considering the scheme of the standard model.
Soft starter
The standard scheme of smooth start of the grinder consistsfrom a triac, a rectifier and a set of capacitors. To increase the operating frequency, resistors are used that pass current in one direction. The starter is protected by a compact filter. The rated 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.
How to connect the model?
Connect the soft start grinderscarried out through an adapter. Its input contacts are connected to the rectifier unit. It is important to determine the zero phase in the device. To fix the contacts you will need a blowtorch. It is possible to check the operation of the starter through the tester. First of all, negative resistance is determined. When installing the starter, it is important to remember the threshold voltage that the device withstands.
The device diagram for the grinder with a triac on 10 A
Схема плавного пуска болгарки, своими руками manufactured, involves the use of contact resistors. The polarity coefficient of the modifications, as a rule, does not exceed 55%. Many models are made with blockers. For the protection of the device is responsible wired filter. To pass the current transceivers used low frequency. The process of lowering the threshold voltage is carried out on the transistor. Triac in this case acts as a stabilizer. When connecting the model, the output impedance when overloaded with 10 A should be about 55 Ohms. Trim plates for starters are suitable on a semiconductor basis. In some cases, magnetic transceivers are installed. They do well with low revs and can maintain a nominal frequency.
Model for Bulgarians with 15 A triac
Smooth start for grinders with triacs at 15 Ais versatile and often found in models of low power. The difference of devices is low conductivity. Scheme (device) soft start grinders involves the use of contact-type transceivers that operate at a frequency of 40 Hz. Many models use comparators. These items are installed with filters. The rated voltage of the starters starts from 200 V.
Starters for Bulgarians with 20 A triac
Devices with 20 amp triacs are suitable forprofessional Bulgarians. Many models have contactor resistors. First of all, they are able to operate at high frequency. The maximum temperature of the starters is 55 degrees. Most models are well protected housing. The standard scheme of the device involves the use of three contactors with a capacity of 30 pF. Experts say that the devices stand out for their conductivity.
The minimum frequency of the starters is 35 Hz.They are able to work in the DC network. Connecting modifications through adapters. For 200 W motors, such devices are well suited. Filters are often installed with triodes. They have a sensitivity index of 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, which is installed with insulators. Current conductance is provided at 5 microns. With a resistance of 40 ohms, the model is capable of stably maintaining large revolutions.
Bulgarian models for 600 watts
For Bulgarians on 600 W apply starters withcontact triacs, whose overload does not exceed 10 A. It is also worth noting that there are many devices with plates. They are distinguished by security and are not afraid of high temperatures. The minimum frequency for Bulgarians at 600 W is 30 Hz. The resistance depends on the installed triode. If it is of the linear type, the above parameter does not exceed 50 ohms.
If we talk about duplex triodes, thenresistance at high revs can reach up to 80 ohms. Very rarely, models have stabilizers that work on comparators. Most often they are mounted directly on the modules. Some modifications are made with wired transistors. Their minimum frequency starts at 5 Hz. They are afraid of overload, but they are able to maintain high speeds at a voltage of 220 V.
Devices for Bulgari 800 W
800 W grinders work with low startersfrequencies. Triacs are often used on 15 A. If we talk about the model circuit, it is worth noting that they use expansion transistors, whose current carrying capacity starts from 45 microns. Capacitors are used with and without filters, and the capacity of the elements is no more than 3 pF. It is also worth noting that starters differ in sensitivity.
If we consider professional grinders, thenfor them are suitable modifications to 400 mV. In this case, the conductance of the current may be low. There are also devices with variable transistors. They warm up quickly, but are not able to maintain the high speed of the grinder, and their current conductivity 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 Bulgarians 1000 W
Starters for these Bulgarians are made ontriacs with an overload of 20 A. The standard circuit of the device includes a triode, a stabilizer lining and three transistors. Rectifier unit is most often installed on a wired basis. Capacitors can be used with or without a filter. The minimum frequency of a conventional model is 30 Hz. At 40 ohms, the starters are capable of supporting large overloads. However, there may be problems at low speed grinders.
How to make the starter with a triac TC-122-25?
Make a smooth start for the TC-122-25 triacgrinders do it yourself pretty simple. First of all, it is recommended to prepare a contactor resistor. Capacitors will need a single pole type. In total, three elements are installed in the starter. The capacitance of a single capacitor should not exceed 5 pF. To increase the operating frequency, a contactor is soldered on the plate. Some experts say that it is possible to increase conductivity due to filters.
Rectifier block is used with conductance from50 microns He is able to withstand high overload and can provide high speed. Further, in order to assemble a smooth start on the grinder with your own hands, a thyristor is installed. At the end of the work, the model is connected via an adapter.
Assembling models with simistors VS1 series
To assemble on the simistor VS1 a smooth start forBulgarians with their own hands can be using several blocks of the rectifier. Capacitors for the device are suitable linear type with a capacity of 40 pF. It is worth starting assembly of modification with the soldering of resistors. Capacitors are installed in sequential order between insulators. The rated voltage of a quality starter is 200 V.
Next, to make a smooth start for the grinderwith their own hands, the prepared triac is taken and soldered at the beginning of the circuit. Its minimum operating frequency should be 30 Hz. In this case, the tester is required to show the value of 50 ohms. If there are problems with overheating of capacitors, then dipole filters should be used.
Model for Bulgarians with a regulator KR1182PM1
To assemble with the regulator KR1182PM1 smoothstart for the grinder with their own hands, the contact thyristor and the rectifier unit are taken. It is more expedient to apply the triode on two filters. It is also worth noting that the assembly of the starter will require three capacitors with a capacity of at least 40 pF.
Показатель чувствительности у элементов обязан be 300 mV. Experts say that the triac can be installed behind the plate. You should also remember that the threshold voltage should not fall below 200 V. Otherwise, the model will not be able to work at lower speeds of the grinder.
