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A multi-mode soft-switching lossless absorber

A non-destructive absorption and soft switching technology, which is applied in the direction of output power conversion device, climate sustainability, high-efficiency power electronic conversion, etc., can solve the inconsistency of switching energy absorption effect, the deterioration of switching energy absorption effect, and the output of component parameters Voltage instability and other problems, to achieve the effect of improving power utilization efficiency, reducing environmental electromagnetic interference, and improving service life

Active Publication Date: 2018-11-20
KUNSHAN SHUOTONG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. RCD absorption, that is, resistance-capacitance-diode combination, has the problem of incomplete energy absorption during switch switching, and according to Joule's law, device energy absorption and heat generation are serious during switch switching, resulting in component parameters and The output voltage is unstable
[0004] 2. LCD absorption, that is, the combination of inductor-capacitor-diode, its problem is that the energy absorption effect of switching switching under different loads is inconsistent, and when the input voltage fluctuates, the absorption effect of switching switching energy deteriorates

Method used

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  • A multi-mode soft-switching lossless absorber
  • A multi-mode soft-switching lossless absorber

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A multi-mode soft-switching lossless absorber, such as figure 1 As shown, it includes primary winding T1A, auxiliary winding T1B and secondary winding T1C of the single-ended converter, switching tube Q1, capacitors C1, C2, C3, diodes D1, D2 and inductor L1, wherein: T1A and T1C form a single-ended positive Exciting or single-ended flyback converter, T1B is an auxiliary winding with the same number of turns as T1A, the function is to make the voltage across C2 equal to VIN, C3, D3, L1, C1, Q1 form a resonant circuit, composed of Q1, C2, D2, C3 constitutes the switch tube clamp absorption circuit, and Q1, C1, D1 form another switch tube clamp absorption circuit.

[0023] The connection relationship of each component is: point A connects single-ended transformer primary winding T1A, switch tube Q1, capacitor C1 and capacitor C2, point B connects the anode of diode D1, capacitor C1 and inductor L1, and point C connects capacitor C2 and diode D2 Positive pole and unilatera...

Embodiment 2

[0036] Another embodiment of the multi-mode soft-switching lossless absorption device is, as figure 2 As shown, one end of the capacitor C3 is connected to the cathode of the diode D2, and the other end is connected to the power supply terminal VIN. In this connection mode, the voltage conditions on H, I, J, and K are the same as those on A, B, C, and D above, except that the voltage at both ends of C3 changes accordingly due to different reference points.

[0037] In a word, the present invention has following effect:

[0038] 1. When the switch tube Q1 is turned on and off, it is clamped by the capacitor and diode circuit connected to it, which strongly suppresses the peak voltage, thereby achieving a smooth switching close to zero voltage, and reducing the environmental electromagnetic caused by the switch tube being turned on and off. interference.

[0039] 2. Reduce the voltage and current that the switching tube bears when it is turned on and off, and improve the serv...

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PUM

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Abstract

The invention discloses a multi-mode soft-switching non-destructive absorption device, which comprises primary winding T1A, auxiliary winding T1B and secondary winding T1C of a single-ended converter, switching tube Q1, capacitors C1, C2, C3, diodes D1, D2 and Inductor L1, where: T1A and T1C form a single-ended forward or single-ended flyback converter, T1B is an auxiliary winding with the same number of turns as T1A, and its function is to make the voltage across C2 equal to VIN, C3, D3, L1, C1, Q1 A resonant circuit is formed, Q1, C2, D2, and C3 form a switching tube clamping absorption circuit, and Q1, C1, and D1 form another switching tube clamping absorption circuit. The non-destructive absorbing device of the multi-mode soft switch of the present invention achieves the purpose of smooth switching close to zero voltage and more thorough absorption of switching energy.

Description

technical field [0001] The invention relates to the technical field of power electronic control switches, in particular to a soft-switching lossless absorption device for a multi-mode switching power supply. Background technique [0002] The current single-tube switching power supply control technology mainly has the following two types: [0003] 1. RCD absorption, that is, resistance-capacitance-diode combination, has the problem of incomplete energy absorption during switch switching, and according to Joule's law, device energy absorption and heat generation are serious during switch switching, resulting in component parameters and The output voltage is unstable. [0004] 2. LCD absorption, that is, the combination of inductor-capacitor-diode, has the problem that the energy absorption effect of switching switching under different loads is inconsistent, and when the input voltage fluctuates, the absorption effect of switching switching energy deteriorates. Contents of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M1/44
CPCH02M1/32H02M1/44H02M1/0058Y02B70/10
Inventor 朱理贤
Owner KUNSHAN SHUOTONG ELECTRONICS CO LTD
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