Design and Simulation of Three-phase AC Motor Soft-start

Ac motor as a motor soft starter auxiliary equipment, can be in ac motor no-load or low load, automatic regulation input voltage motor, and may not affect the motor torque. Soft starter for the market, and is engaged in each industry production enterprise welcome, although at present in price, performance and so on have certain difficulty, but with semiconductor devices development of manufacturing technology, and can foresee in the near future, the soft starter certainly become a kind of improving the necessary depth ac motor application equipment. This paper taking three-phase ac induction motor soft starter for research object, soft start analysis principle, design soft starter main circuit and circuit other system module, and application of Mat lab simulation, the simulation results indicated that soft start was used in motor start advantages.