Design method and circuit for suppressing diode rectification voltage peaks

A technology for suppressing diodes and rectifying voltage, applied to electrical components, adjusting electrical variables, control/regulation systems, etc., can solve the problems of high energy consumption, high heat generation, low efficiency, etc., to improve conversion efficiency, have obvious advantages, and avoid violent Fever effect

Pending Publication Date: 2020-10-16
SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
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  • Abstract
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  • Application Information

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[0005] However, these methods are restricted by various conditions, or the effici

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  • Design method and circuit for suppressing diode rectification voltage peaks
  • Design method and circuit for suppressing diode rectification voltage peaks
  • Design method and circuit for suppressing diode rectification voltage peaks

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[0028] The technical solutions of the present invention will be further specifically described below through embodiments and in conjunction with the drawings.

[0029] The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention (the specific embodiments here only take half-bridge topology as an example. Those skilled in the art can understand that any topology of filter inductors is required for output rectification. The solutions of the present invention are applicable).

[0030] A design method for suppressing diode rectification voltage spikes of the present invention figure 1 In the circuit shown, in order to suppress figure 2 As shown in the voltage spike, the present invention is image 3 Shown in figure 1 The voltage suppression circuit shown in the box is added to the original circuit of the voltage suppression circuit. The present invention refeeds the voltage of the absorption capacitor to the diode ...

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Abstract

The invention discloses a design method and circuit for suppressing diode rectification voltage peaks. The method comprises the steps of enabling the voltage peak energy to be recovered through an active feedback effect by means of a voltage suppression circuit, transferring the transient voltage peak energy of the diode to a voltage platform period after the peak, and adaptively adjusting a clamping voltage according to an output voltage. Diode transient voltage peak energy is transferred to a post-peak voltage platform period; the output voltage range of the whole power converter is realized; the clamping voltage can be adaptively adjusted along with the output voltage, and the voltage peak energy is recovered through the active feedback effect in the voltage clamping process, thereby avoiding the severe heating of a part of elements of a conventional energy consumption type absorption circuit, improving the overall conversion efficiency, and enabling the advantages of a high-power capacity converter to be more obvious.

Description

technical field [0001] The invention relates to the field of power conversion, in particular to a design method and circuit for suppressing diode rectification voltage spikes. Background technique [0002] When the power capacity of the power conversion device is large and the peak rectified current of the diode is high, when the diode is reversely cut off, an overshoot voltage peak will be formed on the parasitic inductance of the line due to its reverse recovery current. This effect may cause the peak voltage of the diode to be the operating voltage 1.5 times or even higher, making it exceed the limit withstand voltage of the diode, or severely reducing the derating level used by the diode, reducing product reliability. [0003] Such as figure 1 As shown, it is a typical half-bridge power converter topology. For the secondary rectifier diode, its working voltage is as follows figure 2 As shown in , it is obvious that the rising edge of the diode is accompanied by signif...

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Application Information

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IPC IPC(8): H02M1/15H02M3/335
CPCH02M1/15H02M3/33592
Inventor 李维旭张现民陈超飞徐艳超李金洁赵耀峰吴飞飞
Owner SHIJIAZHUANG TONHE ELECTRONICS TECH CO LTD
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