MOSFET (metal-oxide-semiconductor field effect transistor)-based inverter type welding equipment by sdie inlet air

Abstract

The invention discloses inverter type welding equipment by using side inlet air. The inverter type welding equipment comprises a front panel, a rear panel, a rectifier and filter circuit, a control module, a driver module, MOSFET (metal-oxide-semiconductor field effect transistor) devices, an inverter module, a rectifier module, a high-frequency transformer, a current regulating device, an input power line, an output port, a fan, a rack and the like. The inverter type welding equipment is chracterized in that the fan is installed at the side of the rack, air outlets are arranged on the front panel and the rear panel, heat-transfer surfaces of the MOSFET devices are arranged on an identical plane which keeps close thermal contact with one same plane of E-shaped heat sinks and forms the inverter module by being installed together with a driver plate, a rectification module and the heat sinks are installed together to form the rectifier module, the fan is arranged above fins of the E-shaped heat sinks of the inverter module, airstream flows vertically to the fins of the heat sinks and flows along a flow channel formed by the fins of the heat sinks so as to continue to cool the rectification module and a main transformer; the airstream is discharged out of the rack from the air outlets on the front panel and the rear panel, so as to form the inverter type welding equipment which has high heat dissipation efficiency, high load rate and simple structure, and is stable and reliable.

Description

technical field [0001] The invention relates to an inverter welding equipment using MOSFET (field effect transistor) as a driving device. This welding equipment can be used for welding metal materials. Weight, increased load duration, and reduced manufacturing costs. The welding equipment formed by adopting the technology of the invention has the characteristics of portability, energy saving, multiple functions, safety and reliability, and low cost. Background technique [0002] The existing inverter welding equipment is divided into IGBT module type and MOSFET discrete component type. The advantages of the former are simple structure, uniform and convenient heat dissipation, but due to low operating frequency, large volume and high cost; the advantage of the latter is high operating frequency , Low cost of materials, small size, light weight, and light weight, but the circuit and structure are more complicated. [0003] Existing MOSFET welding equipment usually adopts the...

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Problems solved by technology

[0007] 3. The secondary rectification circuit adopts multiple associations of fast recovery diodes. Due to the poor consistency of the multi-tube associations, it is necessary to strictly select the electrical parameters, and it is easy to be damaged when the matching is not good.

[0008] 4. Poor heat dissipation results in low load duration, short allowable working cycle and low working efficiency

[0009] 5. Due to the large number of MOSFET devices, which are distributed in a large range, the frontal air intake is generally used for cooling. The air flow path is long and the heat transfer capacity is poor, which may easily cause uneven heat dissipation of MOSFETs, high-frequency transformers, rectifiers and other components. bad

[0010] 6. Usually, it is necessary to use a large-volume radiator and hardware structure, which has a single structure, heavy weight, and high manufacturing cost

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