| 摘要 |
PROBLEM TO BE SOLVED: To obtain a welding power which provides little switching loss but high power factor. SOLUTION: This invention relates to a method and a device for welding having a power supply, a wire supplier, and a controller. The controller transfers control signals to the wire supplier and the power supply. Also, the controller has an adjustable arc control input, and controls at least three parameters in response to the arc control input. The arc control input may be an arc welding width input, and the controller simultaneously controls at least three welding parameters for obtaining a given arc width. The welding parameters include at least three of peak welding current, background current, pulse width and frequency, and the arc control input can be selected by users.
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