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Bidirectional DC transformation circuit and control method thereof

A bidirectional DC conversion and conversion circuit technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, electrical components, etc., can solve the problem of low efficiency of DC conversion circuits and achieve high efficiency

Pending Publication Date: 2018-07-24
SHENZHEN BOYN ELECTRIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a bidirectional DC conversion circuit and its control method in order to solve the problem of low efficiency of the DC conversion circuit in the prior art

Method used

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  • Bidirectional DC transformation circuit and control method thereof
  • Bidirectional DC transformation circuit and control method thereof
  • Bidirectional DC transformation circuit and control method thereof

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Embodiment Construction

[0053] Embodiments of the present invention will be described in detail below. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0054] refer to figure 1 and figure 2 , the bidirectional DC conversion circuit 100' includes a primary side filter capacitor C1', a primary side full bridge conversion circuit 110', a transformer T R’ , the secondary side conversion circuit 120' and the secondary side filter capacitor C2', also includes an inductance L' and a controller 300', and the inductance L' is connected in series with the transformer T R’ and the primary full-bridge conversion circuit 110'. The inductor L' can be an external series inductor or a transformer T R’ The equivalent leakage inductance of the transformer or T R’ The leakage inductance and the equivalent inductance of the external series inductor, the present invention is not limited thereto. The primary side fil...

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Abstract

The invention provides a bidirectional DC transformation circuit and a control method thereof. The circuit comprises a primary filtering capacitor, a primary full-bridge transformation circuit, a transformer, a secondary transformation circuit, a secondary filtering capacitor, an inductor and a controller; the inductor is connected in series between the transformer and the primary full-bridge transformation circuit; both the primary full-bridge transformation circuit and the secondary transformation circuit have functions of inversion and rectification; the secondary transformation circuit realizes rectification in the manners including full-wave rectification, dual-voltage rectification and full-bridge rectification; the front end rear ends of the bidirectional DC transformation circuit are connected with the DC side with a bidirectional capability; and the controller controls the ON sequence of the primary full-bridge transformation circuit and the secondary transformation circuit inthe forward / backward direction. According to the method, the voltage of the inductor and the primary voltage are added to the secondary side of the transformer, and thus, the output voltage is higherthan an original output voltage which is obtained by transforming an original input voltage according to the turn ratio of the transformer.

Description

technical field [0001] The invention relates to the field of DC-DC conversion, in particular to a bidirectional DC-DC conversion circuit and a control method thereof. Background technique [0002] With the rapid development of energy storage products and related fields of battery equipment, DC conversion circuits are more and more widely used, but the efficiency of current DC conversion circuits is low. [0003] In addition, the existing DC conversion circuit cannot adapt to different port voltage scenarios, resulting in limited use. Contents of the invention [0004] The object of the present invention is to propose a bidirectional DC conversion circuit and its control method in order to solve the problem of low efficiency of the DC conversion circuit in the prior art. [0005] In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions: [0006] A bidirectional DC conversion circuit, comprising a pr...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/3353H02M1/0058Y02B70/10
Inventor 李伦全
Owner SHENZHEN BOYN ELECTRIC
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