High power factor rectifier/filter for three phase input welder or plasma cutter
AssigneeThermal Dynamics Corporation
InventorsStephen W. Norris, Roger M. Chamberlin
Life of this patent
Estimating the term…
Abstract
A power supply is provided. The power supply in one form includes a rectifier circuit, a capacitor and an RC circuit. The rectifier circuit is configured to receive a three phase AC signal. The rectifier circuit has a positive output connected to a positive node and a negative output connected to a negative node. The capacitor is connected in parallel with the rectifier circuit between the positive node and the negative node. The RC circuit includes a resistor and capacitor connected in electrical series connection where the resistor and capacitor are connected between the positive node and the negative node in parallel with the first capacitor and the rectifier circuit.
Claims19
A power supply for a welder or cutter comprising:
- a rectifier circuit configured to receive a three phase AC signal, a rectification circuit having a positive output connected to a positive node and the rectifier circuit having a negative output connected to a negative node;
- a first capacitor connected in parallel with the rectifier circuit between the positive node and the negative node;
- and
- a first RC circuit including a first resistor and second capacitor connected in electrical series connection where the first resistor and second capacitor are connected between the positive node and the negative node in parallel with the first capacitor and the rectifier circuit.
A power supply comprising:
- a rectifier circuit configured to receive a three phase AC signal, a rectification circuit having a positive output connected to a positive node and the rectifier circuit having a negative output connected to a negative node;
- a first capacitor connected in parallel with the rectifier circuit between the positive node and the negative node;
- a first RC circuit including a first resistor and second capacitor connected in electrical series connection where the first resistor and second capacitor are connected between the positive node and the negative node in parallel with the first capacitor and the rectifier circuit;
- and
- a second RC circuit including a second resistor and third capacitor connected in electrical series connection where the second resistor and third capacitor are connected between the positive node and the negative node in parallel with the first capacitor and the rectifier circuit.
Dependencies are inferred from the claim text.