Universal power supply for arc welder
AssigneeLincoln Global, Inc.
InventorGeorge D. Blankenship
Life of this patent
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Abstract
A single phase power supply for electric arc welders comprising: a full wave rectifier forming the input of said power supply; a valley fill power factor correcting circuit for controlling input current flow to the rectifier and creating an high crest factor intermediate voltage; a converter forming the output of the power supply for converting the intermediate voltage into a generally ripple free DC voltage; and, switching means in the converter for controlling the output voltage of the converter to a level in the general range of 20-100 volts for welding.
Claims31
A single phase power supply for electric arc welders comprising:
- a full wave rectifier forming the input of said power supply;
- a valley fill power factor correcting circuit for controlling the input current flow to said rectifier and creating an high crest factor intermediate DC voltage;
- a switching converter forming the output of said power supply for converting said intermediate voltage into a generally ripple free DC output voltage;
- and, switching means in said converter for controlling said DC output voltage of said converter to a level in the general range of 20-110 volts for welding.
A single phase power supply for electric arc welders comprising:
- a full wave rectifier forming the input of said power supply;
- a valley fill power factor correcting circuit for controlling the input current flow to said rectifier and creating an high crest factor intermediate DC voltage;
- a switching converter forming the output of said power supply for converting said intermediate voltage into a generally ripple free DC output voltage;
- and, switching means in said converter for controlling said DC output voltage of said converter to a level of less than 113 volts.
Dependencies are inferred from the claim text.