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DC-DC power converter

A power converter, DC-DC technology, applied in the direction of high-efficiency power electronic conversion, no intermediate conversion to AC conversion equipment, electrical components, etc., can solve problems such as unfavorable circuit work efficiency, and achieve the effect of improving work efficiency

Pending Publication Date: 2018-10-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since it can only realize the switching tube S 2 ZVS is turned on, which is not conducive to improving the efficiency of the entire circuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] attached by image 3 It can be seen that the secondary topology structure diagram of a DC-DC power converter of the present invention, the converter includes a switch tube S 1 , switch tube S 2 , inductance L 1 , L 2 , L 3 , Diode D 1 、D 2 , capacitance C 1 、C 2 、C 3 、C 4 .

[0045] Switch tube S 1 collector and inductor L 1 One end of both is connected to the positive input end of the power supply; the switch tube S 1 The emitter and switch S 2 The collector is connected to the capacitor C 1 Negative pole; switch tube S 2 The emitter stage and capacitor C 2 The negative pole of the power supply is connected to the negative input terminal of the input power supply; the inductance L 1 The other end of the diode is connected to D 1 the anode of the diode D 1 The negative pole and the capacitor C 1 The anode of the common connection to the inductor L 2 One end of the inductance L 2 the other end of the capacitor C 2 The anode of the diode D is connec...

Embodiment 2

[0056]In the electric vehicle charging system, the secondary circuit of a DC-DC power converter of the present invention is used as a DC boost module, and the attached Figure 11 It can be seen that the electric vehicle charging system mainly includes a rectifier module and a secondary circuit of a DC-DC power converter of the present invention, the rectifier module rectifies the 220V AC input power, and the output DC power is used as a DC-DC power converter of the present invention The input power supply of the secondary circuit of the converter V i . , the secondary circuit of a DC-DC power converter of the present invention includes a switch tube S 1 , switch tube S 2 , inductance L 1 , L 2 , L 3 , Diode D 1 、D 2 , capacitance C 1 、C 2 、C 3 、C 4 .

[0057] Switch tube S 1 collector and inductor L 1 One end of both is connected to the positive input end of the power supply; the switch tube S 1 The emitter and switch S 2 The collector is connected to the capac...

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PUM

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Abstract

The invention discloses a DC-DC power converter. The DC-DC power converter comprises a switch tube S1, a switch tube S2, an inductor L1, a diode D1, a capacitor C1 and an inductor L2, wherein the diode D1, the capacitor C1, the inductor L2 and a capacitor C2 form a basic boosted circuit. The converter has the characteristics of a quasi-resonant DC-DC power converter such as high work efficiency, low magnetization and PWM voltage regulating capacity; moreover, the converter realizes the ZVS switching-on of all switch tubes by switching in a resonant inductor, and the problem that a traditionalquasi-resonant DC-DC power converter can realize the ZVS switching-on of only one switch tube is solved, so that the work efficiency of the circuit is further improved.

Description

technical field [0001] The invention belongs to the field of power conversion equipment, and in particular relates to a DC-DC power converter. technical background [0002] The traditional quasi-resonant DC-DC power converter is as attached figure 1 As shown, its working principle can be divided into four stages. When the switch tube S 2 Turn off, switch tube S 1 When closed, the supply V i and capacitance C r1 Series pair inductance L r1 and load power. When this phase ends and all switches are turned off, the capacitor C r1 continuous discharge and its current flows through the switch tube S 2 The freewheeling diode switch S 2 The drain-source voltage is clamped to zero, the capacitor C r1 The potential across the terminals remains constant at a minimum. When the switch tube S 2 Closed, switching tube S 1 When turned off, the switch tube S 2 To achieve ZVS turn-on, the power supply V i For capacitance C r1 Charging, inductance L r1 and capacitance C o1 su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
CPCH02M3/07H02M1/0058Y02B70/10
Inventor 付青赖日培胡泽主蒋臻
Owner SUN YAT SEN UNIV