Torque Density Improvement of Five-Phase PMSM Drive for Electric Vehicles Applications

Pinzhi Zhao; Guijie Yang

Torque Density Improvement of Five-Phase PMSM Drive for Electric Vehicles Applications

Pinzhi Zhao

Guijie Yang

Vol. 11, No. 4, pp. 401-407, Jul. 2011

10.6113/JPE.2011.11.4.401

Dual-plane vector control

Finite element analysis

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Abstract

In order to enhance torque density of five-phase permanent magnetic synchronous motor with third harmonic injection for electric vehicles (EVs) applications, optimum seeking method for injection ratio of third harmonic was proposed adopting theoretical derivation and finite element analysis method, under the constraint of same amplitude for current and air-gap flux. By five-dimension space vector decomposition, the mathematic model in two orthogonal space plane, d1-q1 and d3-q3, was deduced. And the corresponding dual-plane vector control method was accomplished to independently control fundamental and third harmonic currents in each vector plane. A five-phase PMSM prototype with quasi-trapezoidal flux pattern and its fivephase voltage source inverter were designed. Also, the dual-plane vector control was digitized in a single XC3S1200E FPGA. Simulation and experimental results prove that using the proposed optimum seeking method, the torque density of five-phase PMSM is enhanced by 20%, without any increase of power converter capacity, machine size and iron core saturation.

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Cite this article

[IEEE Style]

P. Zhao and G. Yang, "Torque Density Improvement of Five-Phase PMSM Drive for Electric Vehicles Applications," Journal of Power Electronics, vol. 11, no. 4, pp. 401-407, 2011. DOI: 10.6113/JPE.2011.11.4.401.

[ACM Style]

Pinzhi Zhao and Guijie Yang. 2011. Torque Density Improvement of Five-Phase PMSM Drive for Electric Vehicles Applications. Journal of Power Electronics, 11, 4, (2011), 401-407. DOI: 10.6113/JPE.2011.11.4.401.