High-power-factor hybrid-structure multi-output switch converter
A high power factor, switching converter technology, applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, and output power conversion devices, etc., can solve the complex and unstable drive of the converter. problems, to achieve the effect of simplifying the circuit structure and control loop, improving efficiency and low efficiency
Active Publication Date: 2019-10-29
SICHUAN UNIV
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However, due to the use of multiple switching tubes and the floating reference ground, the converter still has the problem of complex driving and instability
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[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The invention proposes a novel high power factor hybrid structure multi-channel constant current output switching converter. The converter adopts the integration method of Buck-Boost and Buck PFC converters, and only uses one active switch. Through the proposed passive current sharing network, automatic current sharing and function factor correction functions of multiple outputs are realized. Through a series resonant network, the converter realizes the common ground of the switching tube and the output branch, which is convenient for sampling and driving control, simplifies the control, and reduces the volume of the converter. And without using a transformer, the step-down conversion function is realized, which further reduces the volume of the converter. In addition, due to the structure of single-stage power conversion and inductive...
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The invention discloses a high-power-factor hybrid-structure multi-output switch converter. The high-power-factor hybrid-structure multi-output switch converter adopts a mode of integrating a Buck-Boost converter and a Buck PFC converter, only uses one active switch, and achieves the automatic current sharing and functional factor correction functions of multi-path output through a proposed passive current sharing network; through a series resonance network, the common grounding of a switching tube and an output branch is achieved, the sampling and the driving control are convenient, the control is simplified, and the size of the converter is reduced; under the condition of not using a transformer, the voltage reduction and conversion function is achieved, and the volume of the converter is further reduced; in addition, due to the structure of single-stage power conversion and the control of an inductance critical conduction mode, the high efficiency and the high power factor are achieved; and moreover, the converter can also achieve a wide input voltage, a wide output load and the low voltage stress.
Description
technical field [0001] The invention relates to the technical field of switching converters, in particular to a multi-output switching converter with a high power factor hybrid structure. Background technique [0002] In recent years, with the vigorous development of medium and small power switching converters, switching converters have become an indispensable part of modern electronic equipment and are ubiquitously integrated into people's daily production and life. With the continuous development of corresponding switching converter design technology, modeling methods and emerging semiconductor switching devices, switching converters are becoming more and more compact, reliable and relatively cheap, and are widely used in various fields such as aerospace, military defense, commercial and civil applications. Has been widely used. [0003] However, with the large-scale connection of power electronic equipment to the grid, a large number of harmonics are generated, which ser...
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IPC IPC(8): H02M7/217H02M3/156H02M1/42H05B33/08H05B44/00
CPCH02M7/217H02M3/156H02M1/42H02M1/009H05B45/37Y02B20/30Y02B70/10
Inventor 刘雪山万宇阳贺明智周群梁斌涂国强张福高蒋奥博杨建平
Owner SICHUAN UNIV