Soft-switch inverter circuit with constant common-mode voltage
A common-mode voltage, soft-switching technology, applied in the direction of high-efficiency power electronic conversion, photovoltaic power generation, electrical components, etc., can solve the problem of increasing the structural constraints of soft-switching circuits, and achieve the effect of high power density
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[0035] Example one
[0036] Such as Figure 5 As shown, the structure of the main circuit of the first embodiment of the present invention is described, and the circuit diagram of the combination of IGBT and MOSFET is adopted; the first power switch S 1 And the first power diode D 1 Parallel combination, second power switch S 2 And the second power diode D 2 Parallel combination, third power switch S 3 And the third power diode D 3 Parallel combination and fourth power switch S 4 And the fourth power diode D 4 The parallel combination forms a high-frequency main switch unit.
[0037] By the first auxiliary power switch S 1a And the first auxiliary power diode D 1a Parallel combination, second auxiliary power switch S 2a And the second auxiliary power diode D 2a Parallel combination, first auxiliary resonant capacitor C 1a , The first auxiliary resonant inductor L 1a Form the positive bus polarity resonance network 2. The third auxiliary power switch S 3a And the third auxiliary powe...
Example Embodiment
[0041] Example two
[0042] Such as Figure 8 As shown, the composition of the main circuit of the second embodiment of the present invention is described, and the circuit diagram of the combination of IGBT and MOSFET is adopted; by the first power switch S 1 And the first power diode D 1 Parallel combination, second power switch S 2 And the second power diode D 2 Parallel combination, third power switch S 3 And the third power diode D 3 Parallel combination and fourth power switch S 4 And the fourth power diode D 4 The parallel combination forms a high-frequency main switch unit.
[0043] By the first auxiliary power switch S 1a And the first auxiliary power diode D 1a Parallel combination, first blocking power switch S 1b And the first blocking power diode D 1b Parallel combination, second blocking power switch S 2b And the second blocking power diode D 2b Parallel combination, first auxiliary resonant capacitor C 1a , The second auxiliary resonant capacitor C 2a , The first auxili...
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