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A hybrid bi-directional DC/DC converter

A converter and hybrid technology, applied in the direction of converting DC power input to DC power output, instruments, adjusting electrical variables, etc., can solve the problems of excessive power and inability to match the loss of power devices and magnetic components, and improve transmission efficiency. , The effect of solving excessive loss and reducing stress loss

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  • Description
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Problems solved by technology

[0005] Beneficial effects: a converter provided by the present invention is based on a hybrid isolated three-level converter, which is composed of a coupled inductor, a full-bridge circuit, and a half-bridge circuit. Compared with a traditional half-bridge converter, it has the same output characteristics and transmission In addition, the converter can reduce the stress loss of the switch, greatly improve the transmission efficiency of the converter, and can solve the problem of excessive loss of power devices and magnetic components caused by the mismatch of input and output voltages, thereby improving the transmission efficiency of the converter

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  • A hybrid bi-directional DC/DC converter

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Embodiment Construction

[0007] The invention provides a hybrid bidirectional direct-to-direct converter, which is composed of a full-bridge circuit, a coupled inductor, and a half-bridge circuit. The full-bridge circuit is composed of switch tubes S5, S6, S7, and S8, and each switch tube is connected in parallel A group of diodes and capacitors are formed, the switch tube S5 is connected in parallel with the diode Ds5 and the capacitor Cs5, the switch tube S6 is connected in parallel with the diode Ds6 and the capacitor Cs6, the switch tube S7 is connected in parallel with the diode Ds7 and the capacitor Cs7, and the switch tube S8 is connected with the diode Ds8, The capacitor Cs8 is connected in parallel; the half-bridge circuit is composed of switches S1, S2, S3, and S4 in series, and each switch is connected in parallel with a group of diodes and capacitors. The switch S1 is connected in parallel with the diode Ds1 and the capacitor Cs1. Cs2 is connected in parallel, the switch tube S3 is connecte...

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Abstract

A hybrid bi-directional DC / DC converter Bi-directional DC / DC convert is commonly used in new energy vehicle, a microgrid and that like have high power density, high efficiency, etc, the converter provided by the invention is based on a hybrid isolated three-level converter, coupled inductor, full bridge circuit, Half-bridge circuit composition, which has the same output and transmission characteristics as the traditional half-bridge converter, In addition, the converter can reduce the stress loss of the switch, greatly improve the transmission efficiency of the converter, and solve the problemof excessive loss of power devices and magnetic components caused by the mismatch of input and output voltages, so as to improve the transmission efficiency of the converter.

Description

technical field [0001] The invention relates to a hybrid bidirectional direct-to-direct converter and relates to the field of electric automation. Background technique [0002] Straight-to-straight converters are widely used in many industrial fields, especially in the pursuit of high power density, high-efficiency smart grid and new energy automobile industry, but the traditional straight-to-straight converter switch tube can only withstand the general input or output voltage, At the same time, due to the use of low withstand voltage tubes, the loss of the switch is too high, and the transmission efficiency is reduced. At the same time, although the mixed modulation control scheme can increase the transmission power, the overall efficiency value will not be improved, and the control method is too complicated to be practical. Using a hybrid bidirectional direct-to-direct converter can not only reduce switching losses, but also improve efficiency and greatly reduce costs. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569
Inventor 杨飏
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