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Dual-transformer structure-based bidirectional DC-DC converter and power control method therefor

A dual-transformer, DC-DC technology, applied in the direction of DC power input conversion to DC power output, control/regulation system, output power conversion device, etc., can solve the complex design of the controller and the inability of the converter to achieve large-scale soft switching and wide voltage gain to achieve the effect of increasing the input voltage range, reducing on-state loss and circulation loss, and simplifying the circuit structure

Active Publication Date: 2017-12-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] In order to overcome the problems that the above-mentioned converter cannot realize wide-range soft switching and wide voltage gain under bidirectional power flow, and the controller design is complicated, the present invention discloses a bidirectional DC-DC converter based on a double-transformer structure and its power control method

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  • Dual-transformer structure-based bidirectional DC-DC converter and power control method therefor

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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 DC-DC converter based on a double transformer structure and its power control method are characterized in that it is mainly composed of a main circuit and a control circuit. Such as figure 1 As shown, the main circuit is mainly composed of the input side bridge arm, two high frequency transformers (T 1 , T 2 ) and the bridge arm on the output side, the input side is used for high-frequency inverter of the input voltage, the high-frequency transformer is used to achieve electrical isolation and gain adjustment; the output side is used to sha...

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Abstract

The invention discloses a dual-transformer structure-based bidirectional DC-DC converter and a power control method therefor, and belongs to the field of power electronics. The converter consists of a main circuit and a control circuit; the main circuit consists of an input side, an output side and two transformers; and the control circuit comprises a controller and a driving circuit. By adoption of the converter, large-range soft switching of the converter under wide-range voltage input can be realized by means of controlling the input side voltage vAC of the transformer T1, the input side voltage vAB and the output side voltage vFG of the transformer T2, and the phase-shifting angle between vAC and vAB; meanwhile, the loss of the converter can be lowered and the efficiency of the converter can be improved; and at the same time, the proposed power control method is simple in calculation, real-time and reliable, and capable of improving reliability and feasibility of the system.

Description

technical field [0001] A bidirectional DC-DC converter based on a double transformer structure and a power control method thereof disclosed in the present invention relate to a bidirectional DC-DC converter, in particular to a high-frequency isolated DC-DC converter and a power control method thereof, It 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; considering the safet...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/3353H02M1/0058Y02B70/10
Inventor 沙德尚许国徐亚雄
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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