Shaft Voltage Reduction Method Using Carrier Wave Phase Shift in IPMSM

Jun-Hyuk Im, Yeol-Kyeong Lee, Jun-Kyu Park and Jin Hur
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Jun-Hyuk Im: Electrical Engineering Department, Incheon National University, Songdo 22012, Korea
Yeol-Kyeong Lee: Electrical Engineering Department, Incheon National University, Songdo 22012, Korea
Jun-Kyu Park: Korea Electrotechnology Research Institute (KERI), Changwon 51543, Korea
Jin Hur: Electrical Engineering Department, Incheon National University, Songdo 22012, Korea

Energies, 2021, vol. 14, issue 21, 1-11

Abstract: Common-Mode Voltage (CMV) induces shaft voltage and bearing current due to the electrical interaction with the parasitic capacitance of the motor. CMV, shaft voltage, and bearing current are considered the major causes of bearing fault. Motor fault in a traction system poses a risk of accidents. Therefore, it is necessary to reduce the CMV and the shaft voltage to ensure the reliability of the bearing. However, some existing CMV reduction methods are based on asynchronized space vector pulse width modulation (SVPWM), which will cause unacceptable harmonic distortion at a low switching frequency. Alternatively, some CMV reduction methods based on synchronized SVPWM burden the processor because they require a lot of calculation. In this paper, the method to reduce CMV and shaft voltage is proposed using carrier wave phase shift in SVPWM. CMV is explained in traditional SVPWM, and CMV is reduced by shifting the carrier wave phase of one phase. The simulation model is constructed through MATLAB/SIMULINK and Maxwell 2D/Twin Builder. Considering the proposed method, CMV, shaft voltage, and bearing current are analyzed by an equivalent circuit model. Moreover, the output torque behaviors with different input currents are analyzed through the simulation.

Keywords: pulse width modulation inverters; space vector pulse width modulation; bearing faults; fault tolerance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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