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Half-bridge logical link control (LLC) resonant converter with self-driven synchronous rectifier

A technology of synchronous rectifier and resonant converter, which is used in output power conversion devices, conversion equipment with intermediate conversion to AC, and high-efficiency power electronic conversion, which can solve the problems of high rectifier conduction loss and low switching loss of converters.

Inactive Publication Date: 2011-09-28
GLACIALTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This existing converter has low switching losses since the switching transistor and the rectifying diode can be switched by zero voltage or by zero current
However, this existing converter uses a diode as a rectifier, which results in a higher conduction loss of the rectifier.

Method used

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  • Half-bridge logical link control (LLC) resonant converter with self-driven synchronous rectifier
  • Half-bridge logical link control (LLC) resonant converter with self-driven synchronous rectifier
  • Half-bridge logical link control (LLC) resonant converter with self-driven synchronous rectifier

Examples

Experimental program
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Embodiment Construction

[0039] first with Figure 2a Figure to Figure 2c The analysis of the figure illustrates the influence of the relationship between the switching frequency and the resonant frequency on the operation of the converter.

[0040] in f s ≤f r In the case of t r ≤t≤t s During the period, M 1 open but M 2 closure. because di L m ( t ) dt V or L m ⇒ v s ( t ) = L m n di L m ( t ) dt V ...

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PUM

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Abstract

The invention discloses a half-bridge logical link control (LLC) resonant converter with a self-driven synchronous rectifier. A direct-current shifter and a direct-current repositor and / or a differential transformer are used for driving the synchronous rectifier in a secondary side power circuit. The driving voltage of the synchronous rectifier can be bipolar or unipolar. In a correct operation mode, the half-bridge LLC resonant converter with the self-driven synchronous rectifier can reduce the conduction loss of the rectifier so as to improve the efficiency of the converter.

Description

technical field [0001] The invention discloses a half-bridge LLC resonant converter with a self-driven synchronous rectifier. Background technique [0002] A circuit diagram of the prior art is shown in figure 1 , where the first switching transistor M 1 with the second switching transistor M 2 Connect to the input voltage source V in a half-bridge configuration in Between the resonant tank and the resonant tank; the LLC resonant circuit contains the magnetizing inductance L m , Resonant inductance L r with the resonant capacitor C r ;Transformer T 1 Contains a set of primary side coils N p and two sets of secondary side coils N s ; The first rectifier diode D 1 with the second rectifier diode D 2 Connected to the secondary coil N with a center-tapped full-wave rectifier configuration s with output capacitor C o between. [0003] For the sake of illustration, the following circuit parameters are defined: f s for M 1 with M 2 switching frequency; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M3/335H02M7/217
CPCY02B70/1475Y02B70/1441Y02B70/1433Y02B70/10Y02P80/10
Inventor 王志良余金生
Owner GLACIALTECH