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Bidirectional DC-DC converter and control method thereof

A technology of DC-DC and converter, applied in the field of bidirectional DC-DC converter and its control, which can solve the problems of large number of components and high cost, and achieve the effect of small number of components and low cost

Active Publication Date: 2016-10-19
SANTAK ELECTRONICS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the bidirectional DC-DC converter composed of the DC-DC converter and the charger 15 has a large number of components and high cost.

Method used

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  • Bidirectional DC-DC converter and control method thereof
  • Bidirectional DC-DC converter and control method thereof
  • Bidirectional DC-DC converter and control method thereof

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Embodiment Construction

[0074] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0075] Figure 4 is a circuit diagram of a bidirectional DC-DC converter according to the first embodiment of the present invention. its with figure 1 The DC-DC converter is similar to the DC-DC converter, the difference is that the bidirectional DC-DC converter 10 also includes metal oxide semiconductor field effect transistors T1, T2, a controllable unidirectional conductive device 14, windings W11, W12, and a switch S12.

[0076] The primary side of the transformer Tr in the push-pull circuit 11 includes a terminal 1 , a terminal 2 and a center tap 3 .

[0077] The controllable unidirectional conduction device 14 includes diodes D11, D12 and a charging switch S11. One end of the charging switch S11 is electrically connected to th...

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PUM

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Abstract

The invention provides a bidirectional DC-DC converter and a control method thereof. The bidirectional DC-DC converter comprises a full-bridge converter or a push-pull converter including a rechargeable battery and a transformer, a first winding, a second winding, a controllable one-way conductive device, a rectification filter circuit, a first capacitor, a second capacitor, a first switch tube, a second switch tube and a switch device, wherein the first capacitor and the second capacitor are connected; and the first switch tube and the second switch tube are connected. The switch device is used for making the rectification filter circuit, the first capacitor and the second capacitor form a discharging path in a discharging mode and making the first capacitor, the second capacitor, the first switch tube and the second switch tube form a half-bridge inverter capable of charging the rechargeable battery in a charging mode. Cost of the bidirectional DC-DC converter is low.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a bidirectional DC-DC converter and a control method thereof. Background technique [0002] A bidirectional DC-DC converter is a DC converter that can adjust bidirectional transmission of energy according to actual needs. It has been widely used in uninterruptible power supply systems, aviation power supply systems, battery energy storage, electric vehicles and hybrid energy vehicles. [0003] Existing Technology Adoption figure 1 , figure 2 or image 3 The shown DC-DC converter and charger 15 (in Figure 1-3 Only shown in the box) in the uninterruptible power supply system to realize the rechargeable battery B and the DC bus ( Figure 1-3 Bi-directional transmission of electrical energy in (not shown in). Figure 1-3 The DC-DC converters in all include a rectification filter circuit 12, a capacitor C1 and a capacitor C2 connected in series. The difference is that figure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 郑东文
Owner SANTAK ELECTRONICS SHENZHEN
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