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A Torque Ripple Reduction of Miniature BLDC using Instantaneous Voltage Control  

Lee, Dong-Hee (경성대 전기전자메카트로닉스)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.12, no.3, 2007 , pp. 191-198 More about this Journal
Abstract
This paper proposes the instantaneous source voltage and phase current control for torque ripple reduction of a high speed miniature BLDC motor. As compared with general BLDC motor, a high speed miniature BLDC motor has a fast electrical time-constant. So the current and torque ripple are very serious in a conventional PWM switching during conduction period. In order to reduce the switching current ripple, instantaneously controlled source voltage is supplied to the inverter system according to the motor speed and load torque. In addition, the fast hysteresis current controller can keep the phase current In the limited band. The proposed method is verified by the computer simulation and experimental results.
Keywords
High speed miniature BLDC; Torque ripple reduction; Instantaneous voltage control;
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