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小母线电容永磁同步电机调速系统的改进型功率控制策略

An improved power control strategy for permanent magnet synchronous motor drive system with small DC-link capacitor
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摘要 永磁同步电机的小母线电容调速系统具有成本低、可靠性高等优点,但其直流母线电压波动的负面效果将极大降低调速系统性能。为了提高调速系统的输入功率因数,减少输入电流谐波含量,研究一种应用于小母线电容调速系统的改进型功率控制策略。该策略以功率反馈控制变量代替传统的速度反馈控制变量,并采用改进型PID调节器降低控制误差,以及动态积分饱和限制策略抑制调节器的积分饱和现象,实现对电机功率变量的精确控制。最后,在仿真平台上测试应用改进型功率控制策略的小母线电容电机调速系统的控制效果,证明了该策略能够有效地提高小母线电容电机调速系统的输入功率因数,并抑制控制过程中PID调节器的积分饱和现象。 Permanent magnet synchronous motor drive system with small DC-link capacitor has advantages such as low cost and good reliability.However,DC-link voltage pulsation,a side effect of the system,reduces the control system’s performance.To improve the system’s input power factor and reduce harmonics in input currents,an improved power control strategy is put forward in this paper.Differing from traditional speed feedback control method,this strategy uses power as the input control variable.An improved PID controller is selected to reduce control error.Additionally,an active suppression strategy is applied in the system to suppress the integral saturation and achieve the goal of precise control effect.This improved motor drive system was tested in simulation platform and its control performance proved that the control system improved by power control strategy can maintain a high input power factor and suppress integral saturation effectively.
作者 韩一博 宋昕昱 HAN Yibo;SONG Xinyu(Gree Electric Appliances,INC.of Zhuhai,Zhuhai 519070)
出处 《家电科技》 2020年第S01期106-110,共5页 Journal of Appliance Science & Technology
关键词 永磁同步电机 小母线电容 输入功率因数 积分饱和现象 Permanent magnet synchronous motor Small DC-link capacitor Input power factor Integral saturation
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