An improved rotor speed estimation method of IPMSM drives with fluctuating load

作者：Shi Yuchao^*; Sun Kai; Guo Yan; Jiang Xiaohua; Huang Lipei; Li Yongdong

来源：Transactions of China Electrotechnical Society, 2013, 28(7): 96-102.

• Conventional modeling
• Feed-forward compensation
• Fluctuating loads
• Interior permanent magnet synchronous motor
• Magnetic field analysiss
• Model reference adaptive system
• Motor models
• Rotor flux oriented vector control

In order to estimate the rotor speed of interior permanent magnet synchronous motor (IPMSM) with sensorless control under cyclic fluctuating load accurately, an improved rotor speed estimation method is proposed. A rotor flux oriented vector control with conventional model reference adaptive system (MRAS) based rotor position/speed estimation is employed as the basic control strategy for IPMSM drive. The finite element method (FEM)-based varying parameter model of IPMSM is built by magnetic field analysis in JMAG software to obtain motor parameter variations caused by different phase currents and rotor positions. These motor parameter variations are used in MRAS for precise rotor speed estimation. Furthermore, several motor output torque patterns matching the cyclic fluctuating load with feed-forward compensation strategy are developed to lower the speed ripple. The experimental results demonstrate the feasibility and effectiveness of the proposed control methods, which shows that the error between actual speed fluctuation band and estimated speed fluctuation band is limited within a very low level.

• 出版日期2013
• 单位清华大学