The thyristor communicates the voltage regulation and soft starts
The communication and voltage regulation soft engine of the thyristor is mainly to change the connection method of the thyristor, and the traditional connection method is changed to connect to the three windings, so that the power supply of the thyristor is completed by the method of parallel connection. The thyristor soft engine has a strong adjustable rationality, so users can make appropriate adjustments to the motor according to their different needs, and make the motor start method more suitable for their own needs after corresponding changes.
The conditioning principle of the three-phase communication pressure regulating soft starter
The three-phase AC voltage regulating soft engine makes abundant use of the characteristic curve of the communication voltage, and starts the motor through the characteristics of the communication voltage. It mainly uses three pairs of thyristors inside the motor to connect the motor in series, and completes the change of the registration time by manipulating the size of the trigger pulse and trigger angle. In this case, the motor input can maintain a sufficient voltage to control the motor start. When the motor is started, the voltage will become an additional voltage, and then the three bypass contactors will be combined together, and the motor can be connected to the grid.
The advantages of soft launch over traditional launch
"Soft start" can not only greatly reduce the impact of the transmission system itself, extend the service life of key components, but also greatly shorten the impact moment of the motor starting current, reduce the thermal shock load on the motor and the impact on the power grid, and then save electric energy and extend the working life of the motor. In addition, by using the "soft engine" technique, it is possible to select a motor with a smaller capacity in the selection of electric motors, which can also reduce unnecessary equipment investment. Star delta engine is to rely on changing the wiring of the motor winding, and then change the voltage when the motor is started, the voltage at the time of starting is reduced, so that the starting current becomes smaller, the impact on the bus is reduced when the motor is started, and the voltage drop of the bus voltage when the motor is started is within the promised range (the voltage drop of the bus is required to be no more than 10% of the additional voltage), and the autocoupling decompression is also able to reduce the current when the motor is started, and the voltage obtained when the motor is started is reduced by the change of the voltage tap of the autotransformer, and then the current is reduced. Reduce the impact on the busbar.
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