Bidirectional resonance DC converter and control method thereof

A resonant DC and converter technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve the large turn-off loss and circulation loss, the impact of circuit performance, and the difficulty of two-way power transmission and other problems to achieve the effect of low voltage stress, simple control and high conversion efficiency

CN105207486AActive Publication Date: 2015-12-30NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date: 2015-12-30

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Abstract

The invention discloses a bidirectional resonance DC converter and a control method thereof. The bidirectional resonance DC converter is formed by a low-voltage side power supply, a high-voltage side power supply, low-voltage side first switch tube-low-voltage side fourth switch tube, high-voltage side first switch tube-high-voltage side fourth switch tube, first and second resonant inductors, a resonant capacitor, first and second capacitors and a transformer. When energy is transmitted from the lower voltage side to the high voltage side, the bidirectional resonance DC converter realizes power control through phase-shifting control of the switch tubes at the two sides; and when the energy is transmitted from the high voltage side to the low voltage side, the bidirectional resonance DC converter realizes power control through frequency converting control of the switch tubes. The bidirectional resonance DC converter not only can realize bidirectional transmission and control of the energy at the two sides, but also can realize soft switching of all switch devices in full load range, and is especially suitable for being applied to high-frequency, high-efficiency and high-power-density two-way power transformation occasions.

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Description

technical field

[0001] The invention relates to a bidirectional resonant DC converter and a control method thereof, belonging to the technical field of power electronic converters, in particular to the technical field of bidirectional isolated DC-DC power conversion. Background technique

[0002] Bidirectional DC converters can realize power transmission and control in two directions, and have the functions of two unidirectional DC converters. It has broad application prospects in power systems including energy storage links such as renewable energy power generation, electric vehicles, aerospace power supply, and smart grids.

[0003] In various energy storage systems, the voltage of the energy storage battery is usually very low, while the voltage on the other side (such as the DC bus side) is usually high. How to achieve high-efficiency bidirectional power conversion in the case of a large voltage difference between the two sides is Important issues of domestic and foreig...

Claims

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