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MRSF-PWM Method for Acoustic Noise Reduction of Traction Motor Drive Systems  

홍순찬 (단국대학교 전기전자컴퓨터공학부)
서영민 (단국대학교 대학원 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.7, no.3, 2002 , pp. 262-271 More about this Journal
Abstract
In PWM inverters used in traction motor drive systems, the switching frequency is restricted by their large power capacity and thus the electromagnetic acoustic noise is generated. To reduce such an audible noise, the new MRSF-PWM(Modified Random Switching Frequency PWM) method is proposed. In the Proposed MRSF-PWM method, both triangular wave and sawtooth wave are used together as carrier waves for harmonic diffusion and reference wave is generated by injecting 3rd harmonic into the stone wave to expand the linear control region of output voltages. To verify the validity of the proposed MRSF-PWM method, computer simulations are carried out. And the results show that the MRSF-PWM method is more excellent than other RPWM methods in the aspects of both linearity and harmonic diffusion md more effective than SPWM(Sinusoidal PWM) method for the reduction of an audible noise.
Keywords
Acoustic Noise Reduction; RPWM; Traction Motor Drive Systems;
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Times Cited By KSCI : 1  (Citation Analysis)
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