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LLC series resonant converter and its synchronous rectifying power switch driving method

A power switch and series resonance technology, which is applied to the conversion equipment with intermediate conversion to AC, DC power input to DC power output, and output power conversion devices, etc., can solve problems such as inconvenience and lack of structure, and achieve widespread effect of value

Active Publication Date: 2006-08-30
DELTA ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0019] It can be seen that the above-mentioned existing LLC series resonant converter and its synchronous rectification power switch drive method obviously still have inconvenience and defects in structure, method and use, and need to be further improved urgently
In order to solve the problems existing in the LLC series resonant converter and its synchronous rectification power switch driving method, relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and general products have not been suitable. The structure can solve the above problems, which is obviously a problem that the relevant industry is eager to solve

Method used

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  • LLC series resonant converter and its synchronous rectifying power switch driving method
  • LLC series resonant converter and its synchronous rectifying power switch driving method
  • LLC series resonant converter and its synchronous rectifying power switch driving method

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Embodiment Construction

[0089] In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, the specific implementation of the LLC series resonant converter and its synchronous rectification power switch driving method according to the present invention will be implemented below in conjunction with the accompanying drawings and preferred embodiments The manner, structure, method, steps, features and effects thereof are described in detail below.

[0090] An embodiment is given below to illustrate the LLC series resonant converter (SRC for short) proposed by the present invention.

[0091] see figure 2 The working waveform of the LLC series resonant converter in can be known: at the output rectified current i rec When there is a dead zone, the turn-on time of each rectifier diode D1 or D2 is half a cycle 1 / (2fs) of the LLC series resonance frequency, which is only determined by the parameter values ​​of Ls and Cs. Wh...

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Abstract

This invention relates to a LLC serial resonance converter and its synchronous commutation power switch drive method, in which, said converter includes a bridge circuit, a resonating network, a transformer, a commutation circuit and a frequency adjustment controller, in which, said bridge circuit contains at least a pair of power switches driving the resonant network, the commutation circuit includes at least a pair of synchronous power switches corresponding to the power switch, in which, the frequency adjustment controller provides driving signals of the power switch based on the working frequency of the LLC serial resonant converter and the serial resonant frequency of the resonant network so as to realize the synchronous commutate function.

Description

technical field [0001] The invention relates to an LLC series resonant converter and its synchronous rectification power switch driving method, in particular to an LLC series resonant converter and its synchronous rectification power switch driving method using a frequency adjustment controller to provide a driving signal. Background technique [0002] For prior art, see figure 1 shown. The LLC series resonant converter (SRC for short) shown in the figure adopts a half bridge (half bridge) structure. It includes a half-bridge circuit 110 composed of a pair of power switches S1 and S2 to drive a resonant network 120, the resonant network consists of a series resonant inductor Ls, a series resonant capacitor Cs and the excitation inductance Lm of the transformer TX (not shown shown in the figure) form. The series resonant inductance Ls may also be formed by the leakage inductance of the transformer TX. These three resonance parameters constitute the two characteristic reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/337H02M3/338
CPCY02B70/1433Y02B70/10Y02P80/10
Inventor 孙超群甘鸿坚应建平
Owner DELTA ELECTRONICS INC
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