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Power converter and control circuit thereof

一种电源转换器、转换电压的技术，应用在高效电力电子转换、控制/调节系统、输出功率的转换装置等方向，达到提升转换效率的效果

Active Publication Date: 2020-10-30
SPI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the main objectives of the present invention is to provide a power converter and control circuit and method that can operate in continuous / discontinuous conduction mode and realize zero-voltage switching, so as to solve the problems encountered by traditional technologies

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  • Power converter and control circuit thereof
  • Power converter and control circuit thereof
  • Power converter and control circuit thereof

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Embodiment Construction

[0030] In order to describe the technical content and structural features of the present invention in detail, further description will be given below in conjunction with the implementation and accompanying drawings.

[0031] The purpose of the present invention is to provide a power converter such as a flyback converter with frequency modulation and partial voltage clamping capability, for example, it can operate in a discontinuous current mode / discontinuous conduction mode (Discontinuous Conduction Mode, DCM) at light load ) and heavy load can operate in a continuous current mode / continuous conduction mode (Continuous Conduction Mode, CCM) and can achieve the effect of zero voltage switching.

[0032] Please refer to figure 1 , figure 1It is a functional block diagram of a generalized power converter 100 according to an embodiment of the present invention. The power converter 100 (such as a flyback converter) includes an output unit 105, a first transformer TX1, a first swi...

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Abstract

A power converter including: an output unit that outputs a converted voltage; a transformer that includes a first primary wiring, a second primary wiring, and a secondary wiring; a first switch unit is coupled between first primary wiring and a second node; a first control unit that generates a first control signal according to the converted voltage to control ON / OFF state of the first switch unitvia the delay unit; the processing unit that receives, stores induced power of first induced voltage and releases the stored energy; and the second control unit that generates a second control signalto control the processing unit to control receiving or releasing the energy according to the input voltage and induced power of first primary wiring.

Description

technical field [0001] The present invention relates to a circuit structure of a power converter, in particular to a power converter capable of operating in continuous / discontinuous conduction mode and realizing zero-voltage switching and its control circuit and method. Background technique [0002] Generally speaking, traditional power converters such as active-clamp flyback converters use an active clamp circuit to absorb the leakage inductance energy of the transformer when a main switch of the flyback converter is turned off, reducing the main However, this traditional flyback converter still has problems such as excessive circulating current of the active clamping circuit and phase shift of the secondary side current, and excessive circulating current will cause excessive conduction loss. However, the phase shift of the secondary side current will cause the switching element on the secondary side to generate high surge voltage, resulting in a large switching loss, thus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523H02M1/0038H02M1/0032H02M1/0058H02M3/01H02M3/33569Y02B70/10H02M1/0025H02M1/342H02M3/33507
Inventor 林国藩
Owner SPI ELECTRONICS