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1 概述电机是动力产生的源泉,整个工业的心脏。在精密化、自动化、高品质化的需求下,对电机的控制要求亦随之日益提高。以往的“停止、正转、反转”等简单控制早已不能满足当今工业发展的需求。以往在有变速要求的场合,一般都以直流电机或涡流式交流变速电机来完成,但直流电机有环境适应性差及碳刷磨损等缺陷,而涡流交流变速范围又窄,控制精度差,也都无法满足工业调速的要求。
1 Overview Motor is the source of power generation, the heart of the entire industry. In precision, automation, high quality requirements, the control requirements of the motor also will be increasing. The simple “stop, forward, reverse” and other simple control can no longer meet the needs of today’s industrial development. In the past there are speed requirements of the occasion, the general are to DC motor or vortex AC variable speed motor to complete, but the DC motor has poor environmental adaptability and carbon brush wear and other defects, and vortex AC variable speed range is narrow, the control accuracy is poor, are Unable to meet the requirements of industrial speed regulation.