Research on singlephase AC motor of speed control system
CHEN Hao1,2, WU Dingxiang2,3, KANG Zhiyuan1,2, YANG Zengjian1,2, TANG Lijun1,2
(1.School of Physics and Electronic Sciences, Changsha University of Science & Technology, Changsha 410114, China;
2.Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the NearEarth Eletromagnetic Environments,Changsha 410114,China;
3. Changsha Billion set Electrical Technology Co., Ltd., Changsha 410000, China)

Abstract: Aiming at the problem of continuity and stability of series motor speed control system, the control circuit, protection circuit and driver circuit of singlephase series motor were researched, a method controlling the IGBToff to achieve chopper surge was explored,speed control system based on the STM32 ARM CortexM3 microcontroller core was proposed .The system through the deviation of singlephase AC series motor speed setpoint and feedback values for incremental PID control operation. The PWM output duty cycle based on the PID operation result was calculation to control the IGBT turning on and off, the singlephase AC series motor AC sine wave time was changed to achieve the smooth stepless speed.The results indicate that the control system uses less three IGBT than conventional, not only reduces cost but also improves stability.
Key words: singlephase series motors; governing system; PWM