대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2002년도 하계학술대회 논문집 B
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- Pages.1169-1171
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- 2002
개선된 Randomized Pulse Position PWM기법을 이용한 3상 유도 전동기의 고조파 영향
Improved Randomized Pulse Position PWM Scheme Based on The three-phase Indui Drive To Reduce the Harmonic Effect
- Ha, Sang-Mok (Chonbuk Univ.) ;
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Han, Woo-Yong
(Chonbuk Univ.) ;
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Lee, Chang-Goo
(Chonbuk Univ.) ;
- Kim, Byung-Woo (Chonbuk Univ.)
- 발행 : 2002.07.10
초록
In this paper, RFRPP(Random Frequency Randomized Pulse Position ) PWM for three-phase voltage-controlled inverters is proposed. The LLPWM(Lead-Lag PWM) techinquc is that three switching pulses are located randomly back and forth in each switching interval. But with the restriction of random distribution, the harmonic spectrum cannot be dispersedly and continuously distributed. This paper calculates the duty ratio of the switching pulse firstly. Second, the switching pulses are located randomly in the switching interval. Third, the fixed switching frequency of the space vector modulation is randomly varied. To verify the validity of the proposed technique, simulation study is tried using Matlab/Simulink. When a proposed techniquc is employed, the harmonic spectrum of the inverter output voltagc varies from one cycle to the next and the EMI(Electromagnetic Interference) and resonant vibration are greatly alleviated.
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