基于改进重复控制+LADRC的PMSM电流谐波抑制策略

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PMSM current harmonic suppression strategy based on improved repetitive control and LADRC

KANG Erliang1，²，LI Gongda’，DONG Xinbao² （1.School ofElectricalandElectronic Enginering，Harbin Universityof Scienceand Technology，Harbin150080，China; 2.Engineering Technology Research Center of High Efciency Direct-Drive System in Universities in Heilongjiang， Harbin University of Science and Technology，Harbin15oo8O，China）

Abstract：The current loop is critical for achieving high-precision control in permanent magnet synchronous motor （PMSM） drives. However，current harmonics in PMSM drive systems degrade performance. To address this，a vector control scheme was proposed combining active disturbance rejection control （ADRC） with improved repetitive control for PMSM. First， the sources of current harmonics in PMSM were analyzed，and linear active disturbance rejection control （LADRC） was introduced to suppress DCside disturbances. Second，an improved repetitive controller for odd-order harmonics was proposed， which is connected in paralel with LADRC. The stability of this combined structure was rigorously analyzed.To resolve frequency deviation issues caused by non-integer ratios between the sampling frequency of traditional repetitive control and external harmonic frequencies，an infinite impulse response （IR） filter was incorporated to approximate the fractional delay component，thereby further reducing current harmonics. Simulation and experimental results verify that the proposed method efectively suppresses current harmonics in PMSM drives.

Keywords ：permanent magnet synchronous motor; active disturbance rejection control; repetitive control; current harmonic suppression； infinite impulse response filter

0引言

永磁同步电机（permanent magnet synchronousmotor，PMSM）因其具有体积小、效率高、功率密度大等优点而被广泛应用到电力传动、机器人、电动汽车和航空航天等高精度系统[1]。（剩余15479字）