Abstract

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To reduce the impact of the high current on the power grid from the start process of the asynchronous motor and eliminate the negative influences of traditional reduced voltage start on the electronic and mechanic equipments and enhance the start character of the motor, we studied and improved the soft start of the motor, and put forward the soft starter with the function of pump control which could reduce the water hammers induced in the start and stop of the pump, reduce the oscillation of the pipeline system and perfect the functions of the soft starter. In the article, we used MATLAB to establish simulation module of the three phase current voltage regulation circuit system, and tested the soft starter designed in the article, and the simulation result indicated that the soft starter with pump control function could not only effectively reduce the starting impact of the motor to the power grid, but reduce the impact from the water hammer and optimize the start performance of the motor.

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