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Invert plasma cutter

A plasma cutting machine, cutting machine technology, applied in the direction of plasma welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as grid pollution, achieve the effect of improving service life, reducing weight and volume, and reducing effective current

Inactive Publication Date: 2009-12-16
SHANGHAI GUANGWEI ELECTRIC & TOOLS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, due to the existence of harmonics, it will also cause a certain degree of pollution to the power grid

Method used

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Experimental program
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Embodiment approach

[0032] Such as figure 1 As shown, the internal components of an inverter plasma cutting machine provided by the present invention have a special arrangement structure, and the fan, main power components and radiators are arranged crosswise in the internal structure of the whole machine. The main power components are fixed on the radiator, the rear fan 3 is fixed on the back cover, and the outside air is pumped through the louvers on the back cover to the fourth radiator 4, the fifth radiator 5, the sixth radiator 6 and the inductor 2 for heat dissipation, the middle fan 7 is fixed on the printed circuit board 1 to dissipate heat for the eighth radiator 8, main transformer 9 and output inductor 10, and pass the heat generated by the radiator, transformer and inductor through the mesh on the front cover The cooling holes and the louvers on the side of the upper cover blow to the outside of the machine. The rear fan 3, the middle fan 7, the fourth radiator 4, the fifth radiator ...

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Abstract

The invention provides an invert plasma cutter. The cutter is to add a power correcting device based on the conventional plasma cutter to ensure that input voltage of the invert plasma cutter is synchronized with current phase position, aberrance of the current wave shape is improved, meanwhile, harmonization can be inhibited, peak current and effective current are reduced to improve power efficiency finally. In the invert plasma cutter, a major power element is fixed on a radiator; a rear cover is provided with a rear fan; a printed circuit board is arranged in the middle of the cutter; the printed circuit board is provided with a middle fan; the rear fan, the middle fan and the major heat element are positioned on the same horizontal line; the rear fan pumps outside air through a louver of the rear cover; and the middle fan blows internal heat outside the cutter through the reticular radiation pores on the front cover and the louver on the side surface, thereby forming an excellent horizontal tunnel. The cutter improves the radiation performance, improves service life of the device, and ensures stability and reliability of the whole device.

Description

technical field [0001] The invention relates to an inverter plasma cutting machine. Background technique [0002] Inverter plasma cutting machines all have the problem of low power utilization efficiency, and the efficiency generally does not exceed 70%. The reason is that the AC / DC converters in inverter plasma cutting machines are composed of bridge rectifiers and capacitor filters. of. Due to the existence of a large number of filter capacitors, the conduction angle of the rectifier diode becomes very narrow, and it can only be turned on near the peak of the AC voltage, resulting in severe distortion and phase shift of the AC current, which becomes a spike. This current waveform contains a large number of harmonic components, and the effective power output after filtering will be significantly reduced. Furthermore, due to the existence of harmonics, it will also cause a certain degree of pollution to the power grid. Contents of the invention [0003] The invention pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K10/00
Inventor 范晔平刘记周沈静胡成绰徐德进
Owner SHANGHAI GUANGWEI ELECTRIC & TOOLS
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