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Power supply converter

A technology of power converters and transformers, applied in the direction of adjusting electrical variables, instruments, electrical components, etc., can solve the problems of output capacitor short circuit, high turn-on loss, etc., and achieve the effect of reducing turn-off loss, reducing loss, and improving efficiency

Inactive Publication Date: 2015-11-25
TEN PAO ELECTRONICS HUIZHOU +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There is an output capacitor between the two terminals of the switch tube in the power converter that flows through the large current, and the larger the rated current specification of the switch tube, the larger the output capacitance. During the off period of the switch tube, the stored output capacitor The more charges there are, when the switch is turned on, the output capacitor will be short-circuited by the switch, and the charge stored in the output capacitor will be released quickly, resulting in excessive turn-on loss

Method used

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Embodiment Construction

[0021] In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below with reference to the drawings and embodiments.

[0022] It should be understood that although the terms first, second, etc. are used herein to describe various components or units, these components or units may not be limited by these terms. These terms are only used to distinguish one component or unit from another component or unit. For example, a first component or unit could be termed a second component or unit, and, similarly, a second component or unit could be termed a first component or unit without departing from the scope of example embodiments. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] It will be understood that when a component or unit is referred to as being “connected” or “coupled” to another component or unit, it can be directly connected or...

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Abstract

The invention provides a power supply converter. The power supply converter comprises a transformer connected between a power supply input terminal and a power supply output terminal, a first switch is arranged between a primary winding of the transformer and a power supply input negative terminal, the on-off of the first switch is controlled via output signals of a first control circuit, and a branch circuit formed by the series connection of a capacitor and a diode is also connected between the primary winding of the transformer and the power supply input negative terminal. According to the power supply converter, high reverse voltage spike generated at two terminals of a switch tube during the turn-off of the switch tube can be reduced, and the switch loss is reduced.

Description

technical field [0001] The invention relates to the technical field of control of electronic circuits, in particular to a power conversion device. Background technique [0002] A power converter is a control device involving power conversion, in which an AC sine wave reference signal in phase with the input voltage is obtained from the measured phase. At present, in the single-ended power converter, due to the leakage inductance of the transformer, a high reverse voltage peak will be generated at both ends of the switch tube when the switch tube in the power converter is turned off, which may exceed the withstand voltage of the switch tube and cause The switch tube is damaged, and in order to improve the conversion efficiency of the single-ended power converter, the switch tube must be soft-switched to reduce the switching loss. [0003] There is an output capacitor between the two terminals of the switch tube in the power converter that flows through the large current, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
Inventor 朱昌亚汤能文洪光岱
Owner TEN PAO ELECTRONICS HUIZHOU
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