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Small power spot welding power

A low-power, spot-welding technology, applied in output power conversion devices, electrical components, and AC power input to AC power output, etc. The circuit is complex and other problems, to achieve the effect of safe and reliable working state, light weight and small size of the power supply

Inactive Publication Date: 2007-12-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the prior art spot welding inverter power supply must first be rectified from AC to DC through a full-wave rectifier circuit, and then convert the DC to AC at the required frequency through an inverter circuit, and the spot welding inverter power supply does not have current increment and decrement Function, can only output medium frequency AC, complex circuit, high cost, power supply weight, large volume and other disadvantages, the invention provides a low-power spot welding power supply, directly converts the input power frequency AC into medium and high frequency AC, and has Current increasing and decreasing function, simple circuit, light weight, small size and low manufacturing cost

Method used

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  • Small power spot welding power

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Embodiment Construction

[0010] 1, the present invention uses a high-power insulated gate bipolar transistor (hereinafter referred to as IGBT tube) as a switching device, adopts AC / AC conversion technology to chop the input AC power at a certain frequency, so as to directly obtain the AC power of the required frequency. welding.

[0011] The circuit consists of IGBT tube VT1, IGBT tube VT2, capacitor C1, resistor R3, resistor R4, diode VD1, diode VD2, Zener diode VDz1, Zener diode VDz2, Zener diode VDz3, Zener diode VDz4, Varistor RY1 It is composed of varistor RY2 and welding transformer T100. After the IGBT tube VT1 is electrically connected to the emitter of the IGBT tube VT2, the collector of the IGBT tube VT1 is connected to the circuit input terminal A, the collector of the IGBT tube VT2 is electrically connected to the input terminal of the filter, and the output terminal of the filter is connected to the welding transformer T100. When connected electrically, the filter is a common RC filter; the d...

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Abstract

This invention relates low-power spot-welding power-source. It is characterised by: VT1 of IGBT (insulated gate bipolar transistor) being connected to the emitting electrode of VT2 of IGBT, the lumped electrode being connected to output end A of the circuit, the lumped electrode of VT2, by the wave-filter, being connected to T100 of welded transformer, diode VD1 parallel connected with piezo-resistance RY2, then being connected between the lumped electrode and emitting electrode of VT2; voltage-regulator diode VDz4 and voltage-regulator VDZ3 being connected by the negative electrodes, then being connected between the emitting electrode and lumped electrode of VT2. The use of insulated gate bipolar transistor makes the power source reliable, high frequency and adjustable.

Description

Technical field [0001] The invention relates to a low-power spot welding power source. Background technique [0002] At present, in the production of batteries, electron guns and other products, it is often necessary to perform spatter-free spot welding on certain micro-components, and spatter-free spot welding generally uses AC-DC-AC spot welding inverter power, that is, the 50Hz alternating current is rectified Then it becomes direct current, and then through the inverter circuit into alternating current of the required frequency for welding. This kind of inverter power supply mainly has the following shortcomings: it does not have the function of increasing and decreasing the current, so the welding current waveform is poor in manufacturability, and the welding quality is not stable enough; the working conditions of the inverter device are relatively bad and easy to damage, so the power supply is reliable The performance is not high, especially when it is converted to high fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/293H02M5/297B23K9/09
Inventor 马铁军杨思乾
Owner NORTHWESTERN POLYTECHNICAL UNIV
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