A Novel Current Control Strategy Based on Harmonic Voltage Injection for Power Losses Reduction of PMSMs with Non-Sinusoidal Back-EMF

被引：0

作者：

Kim, Heonyoung ^{[1
]}

Bhattacharya, Subhashish ^{[1
]}

机构：

[1] North Carolina State Univ, Dept Elect & Comp Engn, FREEDM Syst Ctr, Raleigh, NC 27606 USA

来源：

2019 IEEE INDUSTRY APPLICATIONS SOCIETY ANNUAL MEETING | 2019年

关键词：

Permanent magnet synchronous machine; harmonic current losses; harmonic voltage injection; nonsinusoidal back-EMF; non-sinusoidal machine current; vector control; MOTOR;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In terms of permanent magnet synchronous machine (PMSM) design, high power density and a low manufacturing cost can be achieved by sacrificing sinusoidal back-EMF. Those machines suffer from higher torque ripple due to the flux harmonics. Additionally, the non-sinusoidal backEMF introduces current harmonics in the case where the conventional d-q axis current controller is adopted. This introduces additional copper losses in machine stator windings and conduction losses in inverter switches. A novel current control strategy based on harmonic voltage injection is presented for PMSMs with non-sinusoidal back-EMF to reduce the copper losses due to harmonic current components in a high speed region. Based on the harmonic back-EMF information of the machine, the harmonic voltages are injected to cancel out the harmonic components in the back-EMF waveforms so that machine current can be controlled with lower THD and copper losses. This method can be easily applied to the conventional PI current controller without non-sinusoidal coordinate transformation.

引用

页数：6