High-power bi-directional DC (Direct Current)-DC converter circuit in soft switching mode
A DC-DC and soft switching technology, applied in the field of power electronics, can solve problems such as low switching frequency, large electromagnetic noise, and large filter inductor volume, and achieve the goals of reducing switching loss, simple circuit structure, and improving the overall efficiency of the circuit Effect
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[0016] Such as figure 1 As shown, a high-power soft-switching bidirectional DC-DC converter circuit and control method, which include an input power circuit (1), Buck-Boost buck-boost half-bridge converter circuit (2), resonance auxiliary network (3), L filter Network (4), output power circuit (5), isolation drive circuit (6), zero voltage detection circuit (7), current detection circuit (8).
[0017] The input power supply (1) and the output power circuit (5) are batteries, super capacitor banks or other types of electrical energy storage devices.
[0018] The two ends of the capacitor C2 in the resonance auxiliary network (3) are respectively connected to the collector and emitter of the switch tube VT1, and the two ends of the capacitor C3 in the resonance auxiliary network are respectively connected to the collector and the emitter of the switch tube VT2.
[0019] The voltage of the zero voltage detection circuit (7) is taken from the VT1 emitter (Ue1) and the input voltage Uin. ...
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