Design of Intelligent Protection Device for Mineral Motor Based on DSP

Based on analyzing the four kinds of faults (over-load, short-circuit, open-phase and electrical leakage) with their characteristics and studying protection principle of mineral motor, the design scheme of intelligent and synthetic protection device using DSP as the chief chip is presented. According to the requirements of system operation, hardware circuits including leakage protection and voltage generation was given, the algorithm analysis for data acquisition processing was discussed in detail and the experiments of over-load, short-circuit, open-phase and leakage protection were examined. The experiment results show that the hardware circuits and software algorithm realize the design requirements of mineral motor.