The Transactions of the Korean Institute of Electrical Engineers P (전기학회논문지P)
- Volume 52 Issue 2
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- Pages.49-55
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- 2003
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- 1229-800X(pISSN)
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- 2586-7792(eISSN)
Analysis of three-phase current type PWM converter using resonant DC Link snubber
공진 DC 링크 스너버를 이용한 3상 전류형 PWM 컨버터의 해석
- Received : 2003.03.29
- Accepted : 2003.05.27
- Published : 2003.06.01
Abstract
This paper presents a novel three-phase current-fed Pulse Width Modulation converter with switched capacitor type resonant DC link commutation circuit operating PWM pattern strategy under a design consideration of low-pass filter, which can operate on the basis of the principle of zero current soft switching commutation. In the first place, the steady state operating principle of this converter with a new resonant DC link snubber circuit is described in connection with the equivalent operation circuit, together with the practical design procedure of the switched-capacitor type resonant DC link circuit is discussed from a theoretical viewpoint on the basis of a design example for high-power applications. The actively delayed time correction method to compensate distorted currents due to a relatively long resonant commutation time is newly implemented in the open loop control scheme so as to acquire the new optimum PWM pattern. Finally, the experiment of set-up in laboratory system of this converter is concretely demonstrated herein to confirm a zero current soft-switching commutation of this converter. The comparative evaluations between current-fed hard switching PWM and soft-switching PWM converters are carried out from a viewpoint of their PWM converter characteristics.