Some New Aspects in the Design of PWM Inverters
- 1 July 1984
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. IA-20 (4) , 776-784
- https://doi.org/10.1109/TIA.1984.4504487
Abstract
Two methods are described for decreasing switching losses and voltage stresses in the modified McMurray inverter operating with a PWM control. The first method consists of adjusting the firing of the complementary main thyristor during a commutation cycle, according to the actual load current. As a result, one reduces the trapped energy losses and the dv/dt stresses. With the second method, a freewheeling diode is connected across the inverter dv/dt inductor, thus decreasing the effect of the diode reverse recovery current, the voltage overcharge on the commutation capacitor, and the circuit clearing time. Experimental verification of both methods was performed on a 50-kVA inverter.Keywords
This publication has 3 references indexed in Scilit:
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- Fundamentals of a Pulsewidth Modulated Power CircuitIEEE Transactions on Industry Applications, 1972
- Optimum Snubbers for Power SemiconductorsIEEE Transactions on Industry Applications, 1972