Current Harmonics Suppression of Six-Phase Permanent-Magnet Synchronous Motor Drives Using Back-Electromotive Force Harmonics Compensation.
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| Title: | Current Harmonics Suppression of Six-Phase Permanent-Magnet Synchronous Motor Drives Using Back-Electromotive Force Harmonics Compensation. |
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| Authors: | Huang, Po-Sheng1 (AUTHOR), Tsai, Cheng-Ting1 (AUTHOR), Hwang, Jonq-Chin1 (AUTHOR) jchwang@mail.ntust.edu.tw, Lin, Cheng-Tsung2 (AUTHOR), Lin, Yu-Ting2 (AUTHOR) |
| Source: | Energies (19961073). Dec2024, Vol. 17 Issue 24, p6280. 14p. |
| Subjects: | Synchronous electric motors, Power semiconductor switches, Magnetic circuits, Motor drives (Electric motors), Signal processing |
| Abstract: | This paper investigates a back-electromotive force (EMF) harmonic compensation strategy for six-phase permanent-magnet synchronous motors (PMSMs) to reduce current harmonics and improve system performance. Ideally, the back-EMF waveform should be perfectly sinusoidal. However, manufacturing imperfections such as suboptimal magnetic circuit design, uneven winding distribution, and mechanical eccentricity introduce low-order spatial harmonics, particularly the 5th, 7th, 11th, and 13th orders, which distort the back-EMF, increase current harmonics, complicate control, and reduce efficiency. To address these issues, this study proposes a compensation strategy utilizing common-mode and differential-mode current control. By injecting the 6th and 12th harmonics into the decoupled voltage commands along the d-axis and q-axis, the strategy significantly reduces current harmonic distortion. Experimental validation was conducted using a TMS320F28386D microcontroller, which controlled dual inverters via PWM signals and processed real-time current feedback. Rotor position feedback was provided by a resolver to ensure precise and responsive motor control. At a rotational speed of 900 rpm, with a peak phase current I m of 200 A and an IGBT switching frequency of 10 kHz, the phase-a current total harmonic distortion (THD) was reduced from 11.86% (without compensation) to 6.83% (with compensation). This study focused on mitigating harmonics below the 14th order. The experimental results demonstrate that the proposed back-EMF harmonic compensation strategy effectively minimizes current THD, highlighting its potential for improving the performance and efficiency of multi-phase motor systems. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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