IEEJ Journal of Industry Applications
Online ISSN : 2187-1108
Print ISSN : 2187-1094
ISSN-L : 2187-1094

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Voltage Imbalance Correction Using Trapezoidal Modulation in Asynchronous PWM
Toshiyuki AjimaTakafumi HaraShun TaniguchiKimihisa FurukawaHirokazu MatsuiJunki Isobe
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JOURNAL FREE ACCESS Advance online publication

Article ID: 24003605

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Abstract

Permanent magnet synchronous motors (PMSMs) generate torque ripple through the pulse width modulation (PWM) method of voltage source inverters. In this report, we propose a method to reduce torque ripple during overmodula- tion in asynchronous PWM. In asynchronous PWM, when the number of pulses decreases during high-speed rotation, three-phase voltage imbalance occurs and torque ripple occurs. By controlling the PWM pulse edge using trapezoidal wave modulation, seamless control from asynchronous PWM down to a single pulse can be achieved. The effectiveness of the proposed method was confirmed by its simulation and experimental results.

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