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Soft-switching half-bridge inverter power supply system

An arc machining and power supply device technology, applied in positioning devices, metal machining, adjusting electrical variables, etc., can solve the problems of increased cost, complex main circuit circuit structure, complex main circuit control circuit, etc., to achieve high frequency, realize The effect of miniaturization and reduction of turn-off loss

Inactive Publication Date: 2005-09-07
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In a conventional high-voltage full-bridge type inverter circuit, the circuit structure of the main circuit becomes complicated, the overall size of the device increases, and the cost increases
Further, the main circuit becomes complicated and the control circuit also becomes complicated

Method used

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  • Soft-switching half-bridge inverter power supply system
  • Soft-switching half-bridge inverter power supply system
  • Soft-switching half-bridge inverter power supply system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0037] figure 1 It is an electrical connection diagram showing the power supply device for arc machining of the present invention corresponding to high voltage. exist figure 1 Here, the first smoothing capacitor C1 and the second smoothing capacitor C2 are series circuits provided in parallel between the output terminals of the primary rectification circuit DR7, and the capacitance values ​​of the two capacitors are set to be the same. In addition, the primary rectification circuit DR7, which rectifies and converts the output of the AC commercial power supply AC into a DC voltage, corresponds to the first smoothing capacitor C1 and the second smoothing capacitor C2, which filter the DC voltage converted by the primary rectification circuit DR7. High voltage DC power circuit.

[0038] exist figure 1 The half-bridge connected inverter circuit shown in is formed by the first switching element TR1, the second switching element TR2, the first auxiliary capacitor C3, and the s...

Embodiment approach 2

[0054] Figure 4 It is an electrical connection diagram showing the power supply device for arc machining according to Embodiment 2 corresponding to high voltage. exist Figure 4 in and in figure 1 The same reference numerals in the electrical connection diagram showing the electric power supply device for arc machining according to Embodiment 1 of the present invention denote the same operation, and therefore description thereof will be omitted, and different operations will be described.

[0055] The first primary voltage detection circuit CV1 is connected to both ends of the first auxiliary capacitor C3, detects the discharge voltage of the first auxiliary capacitor C3, and outputs it as a first primary voltage detection signal Cv1. Also, the second primary voltage detection circuit CV2 is connected to both ends of the second auxiliary capacitor C4, detects the discharge voltage of the second auxiliary capacitor C4, and outputs it as a second primary voltage detection si...

Embodiment approach 3

[0061] Figure 6 It is an electrical connection diagram showing the power supply device for arc machining according to Embodiment 3 corresponding to high voltage. exist Figure 6 in, with in figure 1 The same reference numerals in the electrical connection diagram showing the electric power supply device for arc machining according to Embodiment 1 of the present invention denote the same operation, so the description will be omitted, and the different operations will be described.

[0062] The primary current detection circuit CT is connected between the contact between the first switching element TR1 and the second switching element TR2 and the primary side of the main transformer INT, detects a primary current, and outputs it as a primary current detection signal Ct.

[0063] The inverter drive circuit SRI corresponding to the primary current is composed of Figure 7 The third OR gate OR4 shown in , the fourth OR gate OR4, the conversion drive setting time limit circuit ...

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PUM

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Abstract

An inverter power supply system includes a half-bridge inverter circuit which includes a first switching element, a second switching element, a first auxiliary capacitor and a second auxiliary capacitor for converting a DC voltage from a DC power supply circuit to an AC voltage. An output control circuit outputs a first output control signal and a second output control signal with a phase difference of a half cycle to control the inverter circuit. An inverter driving circuit turns on the first (or second) switching element when the first (or second) output control signal turns ON while turning off the first (or second) switching element upon lapse of a first (or second) delay time for allowing the first (or second) auxiliary capacitor to discharge to apredetermined level after the first (or second) output control signal turns OFF.

Description

technical field [0001] The present invention relates to a power supply device for arc processing used for arc welding, arc cutting, etc., and an inverter power supply device for supplying high-frequency power to a high-frequency power supply in a plasma processing device. A technology for the switching loss value of the inverter section that occurs when the voltage is converted to high-frequency AC voltage. Background technique [0002] Figure 10 It is an electrical connection diagram showing a power supply device for arc machining using a conventional full-bridge type inverter circuit. exist Figure 10 Among them, both the first power on-off switching element TR3 and the second power on-off switching element TR4 are alternately turned on and off alternately to control the supply of DC voltage from the DC power supply circuit. In addition, when the switching elements of the inverter circuit in the form of a full bridge are turned off, the auxiliary capacitor C5 is charged ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/073B23K9/10H02M3/335H02M7/44H02M7/48H02M7/5387
CPCB23K9/1043H02M1/34H02M2001/342H02M2001/0058H02M7/487H02M3/3376B23K9/1056Y02B70/1491H02M1/342Y02B70/10B23Q3/066B23Q7/06
Inventor 森本庆树土井敏光田中和裕五百蔵弘和真锅阳彦
Owner DAIHEN CORP
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