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Main circuit of IGBT full bridge inverse conversion power

A full-bridge inverter and main circuit technology, which is applied to electrical components, output power conversion devices, and AC power input to DC power output. problem, to achieve the effect of improving reliability

Inactive Publication Date: 2008-01-09
袁忠杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the IGBT inverter power supply circuit is complex, and if the parameter design of each component is unreasonable, it will cause the IGBT to be easily triggered by mistake and be damaged.

Method used

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  • Main circuit of IGBT full bridge inverse conversion power
  • Main circuit of IGBT full bridge inverse conversion power

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] See attached Figure 1.

[0017] The main circuit of the IGBT full-bridge inverter power supply includes four bridge arms composed of four IGBT tubes T1, T2, T3, T4, low-resistance drive sources q1, q2, q3, q4, output main transformer, and IGBT tubes T1, T2 The gates of, T3, T4 are respectively connected in series with driving resistors R1, R2, R3, R4, and two IGBT source-drain bypass capacitors C.

[0018] Namely R1=R3=a; R2=R4=b; parameter selection a=1.2~5b, a=1.2Ω~500Ω, b=1Ω~100Ω, the source and drain of the two IGBT transistors T1 and T3 bypass capacitors respectively C, capacitance C=200pF~10000pF.

example 2

[0020] See Figure 2.

[0021] That is, R1=R3=a; R2=R4=b; parameter selection b=1.2~5a, a=1Ω~100Ω, b=1.2Ω~500Ω, the source and drain of 2 IGBT transistors T2 and T4 bypass capacitors respectively C, capacitance C=200pF~10000pF.

example 3

[0023] See Figure 3.

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Abstract

The invention is concerned with a kind of IGBT full bridge invert power source, relating to four bridge arms made of four IGBT tubes, drive power with low resistance and main output transformer. The grids of T1,T2,T3,T4 to IGBT tubes have drive resistances of R1,R2,R3,R4 in series, and the IGBT drive resistance of the said closed or diagonal bridge arms is different, there are equal capacitances C on both bypasses of the two IGBT tube source and leak pole with larger value of drive resistance, the R1 and R3 are equal to a, R2 and R4 are equal to b or R1 and R2 are equal to a, R3 and R4 are equal to b, while a is equal to (1+beta)b or b is equal to (1+beta)a, betais 20 to 400 percent, and the capacitances C is 200 pF to 10000 pF. The main circuit structure uses full bridge invert power source and unique parameter to perfectly cooperate with main output and main transformer and enhance the reliability of IGBT switch.

Description

Technical field [0001] The invention belongs to an inverter power supply, in particular to a main circuit for improving IGBT full bridge driving and related conversion power supply. Background technique [0002] As a high-power industrial power supply, IGBT inverter power supply can be widely used in various industries, such as electroplating, electrolysis industry, welding and cutting industry, etc., and has become the foundation of our social development. Traditional industrial power supplies are mostly silicon controlled rectifiers or autotransformers to adjust the output. In contrast, IGBT inverter power supply has the advantages of small size, light weight, high output efficiency and energy saving and material saving, which has brought revolutionary changes to the traditional industrial power supply industry, which is called "tomorrow's power supply". However, the IGBT inverter power supply circuit is complicated, and if the parameter design of each component is not reasonab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387
Inventor 袁忠杰
Owner 袁忠杰
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