Design of a New Type of Soft Starter of Motor Based on DSP

Abstract

For problems of bigger starting current and mechanical impact existed in traditional reduced-voltage start method of motor, a design scheme of soft starter of motor based on DSP control was proposed, basic structure, main circuit and function realization of the starter were introduced. The starter can not only realize electrodeless and smooth start in start-up process of motor, but also regulate parameters in starting process according to different load characteristics, so as to achieve the best dynamic effect.

Keywords

• asynchronous motor, soft starter, reduced-voltage start, dsp control