考虑磁路饱和的IPMSM电感辨识算法及变参数MTPA控制策略

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Abstract The d-axis and q-axis inductance of an IPMSM(Interior Permanent Magnet Synchronous Motor)vary with the change of the magnetic circuit saturation,which may reduce the effectiveness of MTPA(Maximum Torque per Ampere)control.Considering the influence of magnetic circuit saturation effect and cross saturation effect caused by the stator current,an inductance identification algorithm and a variable-parameters MTPA control strategy are proposed in this paper.Using the inductance identification algorithm based on rotating high-frequency voltage injection,the d-axis and q-axis inductance under various load conditions could be obtained without any priori knowledge about other parameters.The merits of per unit system are fully utilized by the variable-parameters MTPA control strategy.Using the strategy,the current base value and torque base value are just calculated and the control table of torque-optimal current need not be changed when the d-axis and q-axis inductance have varied,which could overcome the adverse effect caused by inductance parameters variations and achieve the optimal MTPA control under certain torque condition.Finally,experiments were made on an IPMSM control platform,the feasibility and availability of the inductance identification algorithm and the variable-parameters MTPA control strategy presented were validated by experimental results.

Key words： Interior permanent magnet synchronous motor(IPMSM) magnetic circuit saturation inductance identification maximum torque per ampere(MTPA)control per unit system

Received: 23 August 2016 Published: 20 June 2017

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TM341

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	Li Feng
	Xia Chaoying

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Li Feng,Xia Chaoying. Inductance Identification Algorithm and Variable-Parameters MTPA Control Strategy for IPMSM Considering Magnetic Circuit Saturation[J]. Transactions of China Electrotechnical Society, 2017, 32(11): 136-144.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I11/136

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