A cl-ft-cl resonant DC converter

Abstract

The invention discloses a CL-FT-CL resonant DC converter, which is composed of a half-bridge inverter circuit, a CL-FT-CL resonant circuit and a diode rectifier circuit connected in sequence, and the converter is input by the half-bridge inverter circuit , output from the diode rectifier circuit after the action of the CL-FT-CL resonant circuit; the half-bridge inverter circuit is composed of a first switching tube and a second switching tube, and the CL-FT-CL resonant circuit is composed of Composed of the first capacitor, the second capacitor, the first inductor, the second inductor, the flyback high-frequency transformer and the forward high-frequency transformer; the same-named terminals of the flyback high-frequency transformer are not on the same side, and the forward The same-named end of the high-frequency transformer is located on the same side, the flyback high-frequency transformer and the forward high-frequency transformer can broaden the power transmission capability of the converter, and the CL-FT-CL resonant circuit can realize the zero-voltage turn-on of the switch tube , Quasi-zero current turn-off and zero-current turn-off of diodes, and widen the input voltage range and output voltage range of the circuit.

Description

technical field [0001] The invention belongs to a DC converter, in particular to a "capacitor inductance-flyback transformer-capacitor inductance (CL-FT-CL)" resonant DC converter with high efficiency, wide input and output range and high power. Background technique [0002] Now distributed power generation is an emerging energy utilization method. Compared with the traditional large-scale centralized fossil energy power generation method, it has the advantages of high environmental protection, strong sustainability, low cost, and flexible and adjustable installed capacity. It has attracted extensive attention from scholars at home and abroad. As an important part of power electronic devices in distributed power generation systems, DC converters play an important role. They have multiple functions and functions such as connecting different levels of DC buses, controlling DC voltage, and controlling battery charging and discharging. Research hotspots. [0003] In order to i...

AI Technical Summary

Problems solved by technology

However, these converters still have some problems that need to be solved urgently, including the inability to simultaneously turn on and turn off the soft switching of the power switch tubes, and the efficiency is limited; the input and output voltage ranges are narrow, which is not suitable for scenarios that require flexible adjustment of voltage levels; only There is a single power converter, considering the saturation of magnetic components, the limited transmission power of the converter, etc.

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