Method and apparatus for providing welding and auxiliary power

Patent metadata

Field	Value
Publication number	US-9808881-B2
Application number	US-201514636315-A
Country	US
Kind code	B2
Filing date	Mar 3, 2015
Priority date	Mar 3, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A method and apparatus for providing welding-type power and auxiliary power includes an input circuit, a welding-type output power circuit, an auxiliary power circuit, and a controller. The input circuit receives input power and provides power to a common bus. The welding-type output power circuit receives power from the common bus and provides welding-type output power. The auxiliary power circuit receives power from the common bus and provides non-isolated auxiliary output power. The controller controls the auxiliary power circuit and the welding-type output power circuit.

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A welding-type power supply, comprising:
an input circuit, disposed to receive input power and provide bus power to a common bus;
a welding-type output power circuit disposed to receive power from the common bus and provide power to a welding-type output;
an auxiliary power circuit, disposed to receive power from the common bus and to provide non-isolated auxiliary output power; and
a controller connected to control the auxiliary power circuit and the welding-type output power circuit.

2. The welding-type power supply of claim 1 , wherein the input circuit includes a rectifier and a preregulator.

3. The welding-type power supply of claim 1 , further comprising an engine that provides motive power, and a generator that receives the motive power and provides the input power.

4. The welding-type power supply of claim 3 , wherein the engine is a variable speed engine.

5. The welding-type power supply of claim 4 , wherein the controller is connected to control the speed of the variable speed engine.

6. The welding-type power supply of claim 5 , wherein the generator is a variable frequency generator.

7. The welding-type power supply of claim 6 , wherein the controller is connected to control the frequency of the variable frequency generator.

8. The welding-type power supply of claim 1 , wherein the auxiliary power circuit provides a split-phase output.

9. A method of providing welding-type power, comprising:
receiving input power;
providing intermediate power to a common bus;
deriving welding-type output power from the common bus;
providing the welding-type power on a welding-type output;
deriving non-isolated auxiliary power from the common bus;
providing non-isolated auxiliary output power on an auxiliary power output;
controlling the deriving of non-isolated auxiliary power in response to an auxiliary demand for the non-isolated auxiliary power; and
controlling the deriving of welding-type output power in response to a welding demand for the welding-type output power.

10. The method of claim 9 , wherein providing intermediate power includes rectifying and preregulating the input power.

11. The method of claim 10 , further comprising providing motive power to a generator and generating the input power with the generator.

12. The method of claim 11 , wherein providing motive power includes controlling the speed of a variable speed engine in response to at least one of a the demand for the non-isolated auxiliary power and the demand for the welding-type power.

13. The method of claim 12 , wherein generating the input power includes generating the input power at a variable frequency in response to at least one of a the demand for the non-isolated auxiliary power and the demand for the welding-type power.

14. The method of claim 13 , wherein providing the non-isolated auxiliary output power includes providing a split-phase output.

15. A system of providing welding-type power, comprising:
means for receiving input power;
means for providing intermediate power to a common bus, connected to receive the input power;
means for deriving welding-type output power from the common bus, connected to the common bus;
means for providing the welding-type power on a welding-type output, connected to the means for deriving welding-type;
means for deriving non-isolated auxiliary power from the common bus, connected to the common bus;
means for providing the non-isolated auxiliary output power on an auxiliary power output, connected to the means for deriving non-isolated auxiliary power;
controlling the deriving of non-isolated auxiliary power in response to an auxiliary demand for the non-isolated auxiliary power; and
controlling the deriving of welding-type output power in response to a welding demand for the welding-type output power.

16. The system of claim 15 , wherein providing intermediate power includes rectifying and preregulating the input power.

17. The system of claim 15 , further comprising providing motive power to a generator and generating the input power with the generator.

18. The system of claim 15 , wherein providing motive power includes controlling the speed of a variable speed engine in response to at least one of the auxiliary demand for the non-isolated auxiliary power and the welding demand for the welding-type power.

19. The system of claim 15 , wherein the means for providing the non-isolated auxiliary output power provides a split-phase output.

Assignees

• Illinois Tool Works

Inventors

• Madsen Michael D

Classifications

• B23K13/08

  Electric supply or control circuits therefor · CPC title

• B23K9/095

  Monitoring or automatic control of welding parameters · CPC title

• B23K9/1043

  characterised by the electric circuit (B23K9/1012 takes precedence) · CPC title

• B23K9/32

  Accessories · CPC title

• B23K10/006

  Control circuits therefor · CPC title