ZJSHUYI What does a soft start consist of? Function?www.shuyitop.com; #s...
Soft starter is a novel motor control device that integrates motor soft start, soft stop, light load energy saving and various protection functions. The main composition is a three-phase parallel thyristor and its electronic control circuit connected in series between the power supply and the controlled motor. Different methods can be used to control the conduction angle of the three-phase parallel thyristor, so that the input voltage of the controlled motor changes according to different requirements, and different functions can be realized.
When the motor reaches the rated number of revolutions, the starting process is over, and the soft starter automatically replaces the thyristor that has completed the task with a bypass contactor, providing rated voltage for the normal operation of the motor to reduce the heat loss of the thyristor and prolong the service life of the soft starter. , improve its work efficiency, and make the power grid avoid harmonic pollution. The soft starter also provides a soft stop function. The soft stop is the opposite of the soft start process. The voltage gradually decreases and the number of revolutions gradually drops to zero to avoid the torque shock caused by the free stop.
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