A Natural Soft-Commutation PWM Scheme for Current Source Converter and Its Logic Implementation | IEEE Journals & Magazine | IEEE Xplore

A Natural Soft-Commutation PWM Scheme for Current Source Converter and Its Logic Implementation


Abstract:

This paper presents a current soft-commutation pulsewidth modulation (PWM) scheme for three-phase current source converter. With the presented PWM scheme, the incoming sw...Show More

Abstract:

This paper presents a current soft-commutation pulsewidth modulation (PWM) scheme for three-phase current source converter. With the presented PWM scheme, the incoming switch has a positive collector-to-emitter voltage while the outgoing switch has a negative collector-to-emitter voltage during current commutations. Therefore, natural soft commutations for switching transitions are achieved, while current-commutating durations are also lessened. Moreover, some particular advantages can also be obtained such as reduced switching frequency, high dc current utilization ratio, and in-phase transfer between line currents and their references. For more efficient control, this paper then designs logic equations for mapping out the assignments from references to gating signals, allowing a simple implementation using a digital signal processor or a programmable logic device. The theoretical analysis is verified by experimental results.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 58, Issue: 7, July 2011)
Page(s): 2772 - 2779
Date of Publication: 09 September 2010

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