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Dual switch flyback switch circuit for inverter welding machine

A technology of inverter welding machine and switching circuit, which is applied in the direction of conversion equipment, welding equipment, arc welding equipment, etc. with intermediate conversion to AC, which can solve the problems of large output changes, waste of power supply volume and weight, and achieve volume reduction by half Effect

Inactive Publication Date: 2007-08-29
SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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Problems solved by technology

But its disadvantage is that the output changes greatly (±10%) when the grid voltage fluctuates, and when the output power increases, the waste of power supply and the increase of volume and weight

Method used

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  • Dual switch flyback switch circuit for inverter welding machine

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0011] Visible by Fig. 2: the present invention comprises: control circuit, auxiliary circuit, rectification circuit, filter circuit, isolation and transformer circuit, drive circuit, frequency conversion circuit, feedback sampling circuit, modulation circuit; Described alternating current passes rectification circuit, filter circuit It is connected with the drive circuit and the frequency conversion circuit; the drive circuit is connected with the frequency conversion circuit; the frequency conversion circuit is isolated and connected with the first high-frequency rectifier to output to the auxiliary circuit, and the other is connected to the second high-frequency rectifier to output to the control circuit. loop; one end of the feedback sampling circuit is connected to the control loop, and the other end is connected to the drive circuit through...

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Abstract

The switch circuit includes control loop, secondary circuit, rectification circuit, filter circuit, insulation and transformation circuit (ITC), drive circuit, frequency-changing circuit (FCC), feedback sampling circuit, and modulation circuit. Through rectification circuit, filter circuit, AC current is connected to the drive circuit and FCC. The drive circuit is connected to FCC. Through one route of ITC, FCC connected to first high frequency rectification (HFR) is output to the secondary circuit; the other route connected to second HFR is output to the control loop. One end of the feedback sampling circuit is connected to the control loop; and the other end through the modulation circuit is output to the control loop. Comparing with prior art, the invention provides advantages of normal operation under large range (+-20%) of voltage fluctuation of power net, 75% input power from power supply, 1 / 3 weight, and half size. The invention is applicable to welder in WS(M) series.

Description

technical field [0001] The invention relates to a welding machine, in particular to a control circuit and an auxiliary circuit in an inverter welding machine. Background technique [0002] With the continuous development of the welding field, it has also attracted people's attention to welding energy. Since the first inverter welding machine developed in the United States in 1972, the inverter technology has achieved rapid development, from the original thyristor-based main circuit structure to the intelligent (IPM) main circuit mode integrating the drive and the main module. The frequency of the inverter has grown from a few kilohertz in the past to hundreds of kilohertz today. The development of inverter technology has made a huge contribution to energy saving. So far, the high efficiency and energy saving of the main circuit of the welding machine is still the focus of research in the field of welding. . However, with the improvement of the power supply of the control c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28B23K9/09B23K9/10
Inventor 邹罗院程文华
Owner SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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