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Calculate the phase voltage for 3-∅ 180° VSI if the value of DC supply is 20 V.(a) 9.40 V(b) 9.42 V(c) 9.18 V(d) 9.78 VI got this question in final exam.Question is from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives

Answer»

The CORRECT CHOICE is (b) 9.42 V

The best EXPLANATION: The phase voltage for 3-∅ 180° VSI is (√2÷3)×VDC=.471×20=9.42 V. In 3-phase 180° VSI each phase conducts for 180° and only two SWITCHES from DIFFERENT phases conduct at a single time.



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