A bidirectional isolated dcdc converter for suppressing peak voltage and its control method

A bidirectional isolation and peak voltage technology, applied in the direction of adjusting electrical variables, control/regulation systems, high-efficiency power electronics conversion, etc., can solve the problems of poor device performance, high device prices, and difficult to meet, so as to reduce margin and cost , Increase the switching frequency, reduce the effect of system loss

Active Publication Date: 2019-10-29
XIAN HIGH VOLTAGE APP RES INST CO LTD
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  • Abstract
  • Description
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Problems solved by technology

As a result, devices that meet the two working conditions have high prices, large losses, and slow response
Make the performance of the whole device worse, and it is difficult to meet the requirements of users such as electric power and industry

Method used

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  • A bidirectional isolated dcdc converter for suppressing peak voltage and its control method
  • A bidirectional isolated dcdc converter for suppressing peak voltage and its control method
  • A bidirectional isolated dcdc converter for suppressing peak voltage and its control method

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0040] The present invention is a bidirectional isolated DCDC converter for suppressing peak voltage, such as figure 1 As shown, it is arranged between the first DC voltage source V1 and the second DC voltage source V2, and bidirectionally supplies DC power to the first DC voltage source V1 or the second DC voltage source V2, including the first capacitor C1 and the third capacitor C1. The bus capacitance composed of capacitor C3 connected in parallel, the first half-bridge topology composed of the first switching tube Q1 and the second switching tube Q2 in series, the second half-bridge topology composed of the third switching tube Q3 and the fourth switching tube Q4 in series, the fifth The third half-bridge topology composed of the switching tube Q5 and the sixth switching tube Q6 connected ...

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Abstract

The present invention is a bidirectional isolated DCDC converter for suppressing peak voltage and its control method, the converter includes a high-frequency transformer T1, a bus capacitor connected to the high-voltage side of the high-frequency transformer T1, a first half-bridge topology and a second Half-bridge topology, and the third half-bridge topology, the fourth half-bridge topology, the switched capacitor topology and the LC filter topology connected to the low-voltage side of the high-frequency transformer T1; the switched capacitor topology consists of the ninth switching tube M1 and the fifth capacitor C5 Composed in series; by incorporating a capacitor and a switch tube in series next to the full bridge on the low-voltage side. The control signal of the integrated switching tube is obtained through logical operation from the driving signal of the full bridge switching tube. In this way, the device can reduce the margin and cost of semiconductor device selection during boost operation, reduce system loss, increase the switching frequency, and reduce the volume of the device, and can increase the switching frequency to reduce duty ratio loss during step-down operation.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to a bidirectional isolated DC-DC converter for suppressing peak voltage and a control method thereof. Background technique [0002] Bidirectional isolated DC to DC converter (bidirectional isolated DC / DC) is a widely used power electronic device, which can bidirectionally convert one form of DC power into another form of DC power. Widely used in micro-grid, power system, distributed power generation, energy storage system, rail transit, motor traction, aerospace, ships, industrial control and other fields. [0003] For example, a microgrid system with an energy storage battery pack, on the one hand, can store temporarily excess energy in batteries, supercapacitors through bidirectional DC / DC converters On the other hand, when the power supply of the microgrid is tight, in order to ensure the continuous and stable operation of important loads, the energy of the ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523H02M3/33584H02M1/0038H02M1/0048Y02B70/10
Inventor 贺俊王弋飞李侠
Owner XIAN HIGH VOLTAGE APP RES INST CO LTD
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