Push-pull ortho-exciting three-level DC inverter
A push-pull forward, three-level technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, instruments, etc., can solve the problems of large output filter and large change in duty cycle, and achieve reduction Small voltage rating, reduced conduction loss, and reduced loss effect
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[0011] The specific embodiment of the present invention will be described according to the accompanying drawings. As can be seen from Fig. 1, the main circuit of the push-pull forward three-level DC converter of the present invention consists of an input voltage dividing capacitor circuit 1, two three-level branches 2, 3, and a flying capacitor C c , Clamp capacitor C, isolation transformer, rectifier bridge and filter circuit 4 components. where the voltage divider capacitor C 1 and C 2 The capacity is large and equal, and its voltage is the input voltage V in half of the V c1 =V c2 =V in / 2, which can be regarded as a voltage of V in / 2 voltage source. Three power switch tubes S 1 , S 2 , S 5 and its antiparallel diode D S1 、D S2 、D S5 Form a three-level branch 2; three power switch tubes S 3 , S 4 , S 6 and its antiparallel diode D S3 、D S4 、D S6 Another three-level branch 3 is formed. N P1 , N P2 , N S They are the two primary and secondary windings ...
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