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Bi-directional hybrid bridge dc-dc converter and half-period volt-second area balance control method

A technology for DC-DC and converter control, applied in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the complex design of the controller and the inability of the converter to achieve a wide range of soft switching and wide voltage Gain and other issues

Active Publication Date: 2019-04-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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[0029] The present invention will be described in detail below in conjunction with accompanying drawing and embodiment, also described the technical problem and beneficial effect that the technical solution of the present invention solves simultaneously, it should be pointed out that described embodiment is only intended to facilitate the understanding of the present invention, and It has no limiting effect on it.

[0030] A bidirectional hybrid bridge DC-DC converter disclosed in this embodiment is mainly composed of a main circuit and a control circuit. Such as figure 1 As shown, the main circuit is mainly composed of an input side, a high-frequency transformer and an output side. The input side is used for high-frequency inverter of the input low voltage, and the high-frequency transformer is used for electrical isolation and gain adjustment; the output side is used for the transformer AC voltage shaping to achieve rated voltage output; the input side is composed of high-f...

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Abstract

The invention discloses a bidirectional hybrid bridge DC-DC converter and a half-cycle volt-second area balance control method, which belong to the direction of high-frequency switching power supply in the field of power electronics. The bidirectional hybrid bridge DC-DC converter disclosed by the invention is composed of a main circuit and a control circuit; the main circuit is composed of an input side, a high-frequency transformer and an output side; the control circuit includes a controller and a drive circuit. Based on the proposed bidirectional hybrid bridge DC-DC converter, half-cycle volt-second area balance control is employed. By adjusting the duty cycle of the input side and the half-cycle volt-second area balance control at the same time, the effective value of the leakage inductance current can be reduced in the stage when the power is not transmitted, the reactive current can be reduced, and the circuit on-state loss and circulating current loss caused by the current can be reduced. At the same time, a wide range of soft switching of each switch tube device can also be realized. In addition, the half-cycle volt-second area balance control can realize real-time control of bidirectional power flow while reducing the complexity of the control unit.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353H02M1/0058Y02B70/10
Inventor 沙德尚许国徐雅雄焉禹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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