Zero voltage conversion CLL resonance DC-DC converter and control method thereof
A DC-DC, converter technology, applied in the field of zero-voltage conversion CLL resonant DC-DC converter and its control, can solve the problems of insufficient light-load efficiency of LCC converters, and it is difficult to effectively utilize the parasitic elements of the transformer, etc. Achieve high-efficiency operation, low power, and reduce switching losses
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[0021] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] Such as figure 1 Shown is the circuit diagram of the ZVT CLL resonant DC-DC converter of the present invention; comprising: a DC power supply (1), a full-bridge HF converter (2), a ZVT auxiliary circuit for zero-voltage conversion (3), and a CLL resonant circuit (4) , isolation transformer (5), diode rectifier circuit (6), energy storage circuit (7), load (8);
[0023] The full-bridge high-frequency HF converter includes four MOSFET tubes S 1 , S 2 , S 3 , S 4 , each MOSFET tube is connected in parallel with a snubber capacitor C n ;
[0024] The ZVT auxiliary circuit is installed between the bridge arms of the HF converter, and the DC input can be powered by the renewable energy V s provided, the auxiliary capacitor C z with MOSFETs S a Parallel, diode D 1z with auxiliary inductance L z connected in series to S 1 , S 4 B...
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