Abstract
Design a DC/AC converter based on simplex single voltage source high frequency pulse DC loop technology, the output is 115V400Hz, 0.9KVA and the input is three phase alternating current. The forward part is DC/DC converter which provides pulse D.C. to the back part DC/AC converter. Implement soft-switch by changing the on-off state of switching tubes on the inversion arm path at the zero-voltage instant of the pulse direct current, no need of the auxiliary resonant net. The system takes three-state DPM current hysteresis control mode, gets good performance on output wave and efficiency.
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