Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2001.10a
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- Pages.168-174
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- 2001
A New Space Vector Random Position PWM Scheme
새로운 공간벡터 Random Position PWM기법
- Kim, Hoe-Geun (Dept. of Electrical Eng. Chonnam National University) ;
-
Lim, Young-Cheol
(Dept. of Electrical Eng. Chonnam National University)
;
- Na, Seok-Hwan (How) ;
- Jung, Young-Gook (Dept. of Electrical Eng. Daebul University)
- Published : 2001.10.26
Abstract
In this paper, a new space vector RPPWM (Random Position PWM) is proposed. In the proposed RPPWM, each of three phase pulses is located randomly in each switching interval. Based on the space vector modulation technique, the duty ratio of the pulses is calculated. Along with the randomization of the PWM pulses, we can obtain the effects of spread spectra of voltage, current as in the case of randomly changed switching frequency. To verify the validity of the proposed RPPWM, simulation study was tried using Matlab/simulink. The main model described in Simulink block diagrams includes the space vector modulation block, pulse position randomization block, inverter block, 3 phase induction motor block, and so on. By the simulation study, the harmonics of the output voltage, and the current of inverter are predicted in different PWM methods- SVPWM, LLPWM, proposed RPPWM.
Keywords