Bidirectional hybrid bridge DC-DC converter and half-cycle volt-second area balance control method

Abstract

The invention discloses a bidirectional hybrid bridge DC-DC converter and a half-cycle volt-second area balance control method, and belongs to a high-frequency switching power supply in the electric power and electronic field. The bidirectional hybrid bridge DC-DC converter disclosed by the invention consists of a main circuit and a control circuit; the main circuit consists of an input side, a high-frequency transformer and an output side; and the control circuit comprises a controller and a driving circuit. Based on the proposed bidirectional hybrid bridge DC-DC converter, half-cycle volt-second area balance control is adopted; the leakage inductance current effective value in a power non-transfer stage can be reduced by adjusting the duty ratio of the input side and by performing the half-cycle volt-second area balance control at the same time, and reactive current can be decreased, thereby lowering circuit on-state loss and ring current loss caused by the current; meanwhile, wide-range soft switching of each switching tube device also can be realized; and in addition, by virtue of the half-cycle volt-second area balance control, real-time control of bidirectional power flow can be realized while the complexity level of the control unit also can be lowered.

Description

technical field [0001] The present invention relates to a bidirectional DC-DC converter and a half-period volt-second area method for controlling the converter, in particular to a high-frequency isolated bidirectional hybrid bridge DC-DC converter and its half-period volt-second area method The balance control method belongs to the direction of high-frequency switching power supply in the field of power electronics. Background technique [0002] With the development of power electronics technology, the demand for bidirectional, high-frequency isolation, and high-efficiency converters is gradually increasing, especially in various power supply systems such as solid-state transformers including energy storage units, high-voltage direct current transmission, and micro-grids. Because these systems need to control the energy of charging and discharging the energy storage unit, the converter is required to have the characteristics of bidirectional controllable power flow; consider...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems that the above-mentioned converter cannot realize large-scale soft switching and wide voltage gain under bidirectional power flow, and the controller design is complex, the present invention discloses a bidirectional hybrid bridge DC-DC converter and half-period volt-second area balance control Method, the technical problem to be solved is to provide a bidirectional hybrid bridge DC-DC converter topology and its half-period volt-second area balance control method for the bidirectional DC-DC converter occasion

Images