电机与控制应用2025，Vol.52Issue(6)：680-689,10.DOI:10.12177/emca.2025.051
一种循环水泵变极电机的切换控制技术研究
Research on Switching Control Technology for Pole-Changing Motors in Circulating Water Pumps
摘要
Abstract
[Objective]The circulation water pump adopts a shielded three-phase AC asynchronous pole-changing motor.During the high-speed to low-speed mode transition and the low-speed to high-speed mode transition,this motor requires an extended power interruption period,resulting in significant drops in both motor speed and process loop flow rate.To address this mode transition challenge,a novel bidirectional control strategy for seamless switching between high-speed and low-speed operation modes is proposed at the paper.[Methods]First,taking the pole-changing motor of the circulation water pump as the analysis object,a simulation model of the pole-changing motor was established based on the pole-changing principle and the mathematical equations of AC asynchronous motors.A simulation model for low-speed and high-speed drive control of the pole-changing motor was then constructed.To minimize the flow rate drop during the switching process,with the goal of reducing motor speed drop,the dynamic characteristics of parameters such as the motor's residual electromotive force and speed during mutual switching between high-speed and low-speed modes were investigated.Concurrently,considering the operational constraints during pole-changing motor mode transition,a control strategy for switching from low-speed to high-speed and from high-speed to low-speed was designed.The proposed control strategy was applied to the development of the frequency converter power supply for the circulation water pump.Bench tests demonstrated excellent compatibility between the power supply and the circulation water pump.[Results]The experimental results confirmed that smooth switching between high-speed and low-speed operation modes were achieved,and operation mode switching requirements for circulation water pump.During the transition from high-speed to low-speed mode,the speed fluctuation was controlled within 22.7%and the flow fluctuation was maintained within 22.7%.Conversely,during the transition from low-speed to high-speed mode,the speed fluctuation was limited to 25.4%and the flow fluctuation was kept within 25.5%.[Conclusion]The pole-changing strategy proposed in this paper for switching between high-speed and low-speed operation modes of circulating water pump motors effectively resolves the challenges of operational mode transition,demonstrating significant engineering applicability.关键词
循环水泵/变极电机/转速跌落/回路流量跌落Key words
circulating water pump/pole-changing motor/speed fluctuation/flow fluctuation分类
动力与电气工程引用本文复制引用
高大朋,何亮,骆攀,刘品超,韩剑波,陈凯旋,周炳呈,刘堂胜,谢峰..一种循环水泵变极电机的切换控制技术研究[J].电机与控制应用,2025,52(6):680-689,10.基金项目
国家自然科学基金(U2267206) National Natural Science Foundation of China(U2267206) （U2267206）
