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A DC-DC boost converter circuit

A conversion circuit, DC boost technology, applied in the direction of converting DC power input to DC power output, electrical components, adjusting electrical variables, etc., can solve the problems of inability to achieve high gain, low converter efficiency, etc. The effect of improving work efficiency

Active Publication Date: 2018-06-01
MOSO POWER SUPPLY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, in order to solve the technical problems of the inability to achieve high gain and low converter efficiency in the DC-DC boost converter in the traditional technology, the present invention provides a DC-DC boost converter circuit

Method used

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  • A DC-DC boost converter circuit
  • A DC-DC boost converter circuit
  • A DC-DC boost converter circuit

Examples

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Effect test

Embodiment 1

[0039] In the above figure 1 Based on the DC-DC boost conversion circuit shown, such as figure 2 As shown, the above DC-DC boost conversion circuit further includes a first absorption diode Ds1 and a second absorption diode Ds2 connected in series, and the cathode of the first absorption diode Ds1 is connected to the anode of the input power source Vin, and the first absorption diode Ds1 and the second absorption diode Ds2 are connected in series. The anode of the two absorption diode Ds2 is connected to the cathode of the input power source Vin;

[0040] The DC-DC boost conversion circuit further includes a first absorption capacitor Cs1, one end of the first absorption capacitor Cs1 is connected to the anode of the first absorption diode Ds1, and the other end of the first absorption capacitor Cs1 is connected to the anode of the first absorption diode Ds1. The drain of the power switch S1 is connected.

[0041] It should be noted that in this embodiment, the first absorbing di...

Embodiment 2

[0048] In the above figure 1 Based on the DC-DC boost conversion circuit shown, such as image 3 As shown, the above DC-DC boost conversion circuit further includes a third absorption diode Ds3 and a fourth absorption diode Ds4 connected in series, and the cathode of the third absorption diode Ds3 is connected to the drain of the power switch S1, so The anode of the fourth absorption diode Ds4 is connected to the source of the power switch S1; the DC-DC boost conversion circuit further includes a second absorption capacitor Cs2, one end of the second absorption capacitor Cs2 is connected to the first The anode of the three absorption diode Ds3 is connected, and the other end of the second absorption capacitor Cs2 is connected to the anode of the rectifier diode D2.

[0049] It should be noted that in this embodiment, the third absorbing diode Ds3, the fourth absorbing diode Ds4, and the second absorbing capacitor Cs2 constitute a passive lossless absorbing circuit.

[0050] Specif...

Embodiment 3

[0055] In the above figure 1 Based on the DC-DC boost conversion circuit shown, such as Figure 4 As shown, the aforementioned DC-DC boost conversion circuit further includes a fifth absorption diode Ds5 and a sixth absorption diode Ds6 connected in series, and the anode of the fifth absorption diode Ds5 is connected to the anode of the rectifier diode D2, and the first The cathode of the six absorption diode Ds6 is connected to the cathode of the rectifier diode D2; the DC-DC boost conversion circuit further includes a third absorption capacitor Cs3, one end of the third absorption capacitor Cs3 and the fifth absorption diode Ds5 The cathode of the third absorption capacitor Cs3 is connected to the anode of the input power source Vin.

[0056] It should be noted that in this embodiment, the fifth absorbing diode Ds5, the sixth absorbing diode Ds6, and the third absorbing capacitor Cs3 constitute a passive lossless absorbing circuit.

[0057] Specifically, at the moment when the p...

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PUM

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Abstract

An embodiment of the invention discloses a DC-DC boost converter circuit which comprises an input power supply Vin, an input filter capacitor C1, a power transistor S1, a body diode D1 of the power transistor, an output filter capacitor C2 and an output load R1, wherein the input power supply Vin, the input filter capacitor C1, the power transistor S1, the body diode D1 of the power transistor, the output filter capacitor C2 and the output load R1 are connected in parallel. The source electrode of the power transistor S1 is connected with the cathode of the input power supply Vin. The anode and the cathode of the body diode D1 are respectively connected with the source electrode and the drain electrode of the power transistor S1. The DC-DC boost converter circuit further comprises a first Boost power inductor L1 and a rectifier diode D2. The first Boost power inductor L1 is connected with the anode of the input power supply Vin and the drain electrode of the power transistor S1. The rectifier diode D2 is connected with the drain electrode of the power transistor S1 and output voltage. The DC-DC boost converter circuit is characterized in that the DC-DC boost converter circuit further comprises a second Boost power inductor L2; and the second Boost power inductor L2 is connected with the drain electrode of the power transistor S1 and the anode of the rectifier diode D2. The DC-DC boost converter circuit can realize high voltage gain and improves operation efficiency.

Description

Technical field [0001] The invention relates to the technical field of power electronics, and in particular to a DC-DC boost conversion circuit. Background technique [0002] The traditional DC-DC boost converter includes a power switch, a Boost power inductor, and a rectifier diode; the drain of the power switch is connected to one end of the Boost power inductor and the anode of the rectifier diode, and the other end of the Boost power inductor is connected To the positive terminal of the input power supply. [0003] This traditional DC-DC boost converter can achieve the boost function, but the output voltage gain is small, and the ratio of the output voltage to the input voltage is: V out :V in =1: (1-D), where D is the duty cycle. Although a higher output voltage can be obtained by setting a larger duty cycle, the Boost power inductor and other factors in the circuit show a further increase in the output voltage, and when the duty cycle is increased to a certain extent, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33561
Inventor 胡炎申
Owner MOSO POWER SUPPLY TECH