US6469401B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine driven welding power supply with inverter auxiliary power
Assignee: Illinois Tool Works Inc
•
Filing: 2001-09-24
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Granted: 2002-10-22
•
Expires: 2021-09-24
Abstract
Abstract A method and apparatus for welding with an engine driven inverter power supply includes generating an ac output with an engine and generator. The output is rectified and inverted to provide an ac inverter output. The engine is controlled using feedback indicative of a welding output operating parameter. The feedback may also be taken from the inverter or generator, and the generator may be controlled instead of or in addition to the engine. Engine parameters that may be controlled include engine speed, selecting between an idle speed and a run speed, a throttle position, a fuel pump, an injection timer, a fuel to air ratio, fuel consumption and ignition timing. Another aspect of the invention is having the feedback be responsive to one or more of the welding current, welding voltage, welding power, or functions thereof. The feedback may be responsive to the current, voltage, power, ripple and functions thereof. An aux power output is derived directly from the generator and feedback from the aux load is used to determine if the engine should be idling or running at high speed.
Inventors
- 👤 Richard Beeson
- 👤 Stephen Li
- 👤 Alan Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:46
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/095; B23K9/0956; B23K9/10; B23K9/1006
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
105 words
A stand alone welding power supply comprising; a primary mover mechanically coupled to a rotating shaft; a generator having a rotor mechanically coupled to the shaft, and further having a stator magnetically coupled to the rotor, whereby the generator provides a generator output; a welding power converter having a converter input in electrical communication with the generator output, wherein the converter converts power from the converter input to provide a welding output; and an auxiliary power inverter having an auxiliary input in electrical communication with the generator output, wherein the auxiliary inverter inverts power from the auxiliary inverter input to provide an auxiliary power output.
Claim 2
Dependent Claim
105 words
A stand alone welding power supply comprising; a primary mover mechanically coupled to a rotating shaft; a generator having a rotor mechanically coupled to the shaft, and further having a stator magnetically coupled to the rotor, whereby the generator provides a generator output; a welding power converter having a converter input in electrical communication with the generator output, wherein the converter converts power from the converter input to provide a welding output; and an auxiliary power inverter having an auxiliary input in electrical communication with the generator output, wherein the auxiliary inverter inverts power from the auxiliary inverter input to provide an auxiliary power output.
Claim 3
Dependent Claim
57 words
The stand alone welding power supply of claim 1 , further comprising; a controller coupled to the primary mover and having a feedback input; and a feedback circuit coupled to the auxiliary output and the feedback input wherein a feedback signal responsive to at least one auxiliary power output operating parameter is provided to the feedback input.
Claim 4
Dependent Claim
40 words
The power supply of claim 2 wherein the primary mover includes a speed control and the controller includes an output coupled to the speed control, wherein the speed of the primary mover is controlled in response to the feedback signal.
Claim 5
Dependent Claim
16 words
The power supply of claim 1 wherein the auxiliary power inverter is a 60 Hz inverter.
Claim 6
Dependent Claim
14 words
The power supply of claim 1 wherein the generator is a three phase generator.
Claim 7
Dependent Claim
14 words
The power supply of claim 1 wherein the generator is a single phase generator.
Claim 8
Dependent Claim
27 words
A stand alone welding power supply comprising; an engine-driven generator; a welding power converter connected to the generator; and an auxiliary power inverter connected to the generator.
Claim 9
Dependent Claim
27 words
A stand alone welding power supply comprising; an engine-driven generator; a welding power converter connected to the generator; and an auxiliary power inverter connected to the generator.
Claim 10
Dependent Claim
22 words
The stand alone welding power supply of claim 1 , further comprising a controller coupled an output of the auxiliary power inverter.
Claim 11
Dependent Claim
25 words
The power supply of claim 2 wherein the controller includes an engine speed control output coupled responsive to the output of the auxiliary power inverter.
Claim 12
Dependent Claim
87 words
A stand alone welding power supply comprising; primary mover means for turning a rotating shaft; generator means for generating a generator electrical output, wherein the generator means is coupled to the primary mover means; welding power means for receiving the generator electrical output and providing a welding power output, wherein the welding power means is connected to the generator means; and auxiliary power means for inverting the generator electrical output and providing an auxiliary power output, wherein the auxiliary power means is connected to the generator means.
Claim 13
Dependent Claim
87 words
A stand alone welding power supply comprising; primary mover means for turning a rotating shaft; generator means for generating a generator electrical output, wherein the generator means is coupled to the primary mover means; welding power means for receiving the generator electrical output and providing a welding power output, wherein the welding power means is connected to the generator means; and auxiliary power means for inverting the generator electrical output and providing an auxiliary power output, wherein the auxiliary power means is connected to the generator means.
Claim 14
Dependent Claim
41 words
The stand alone welding power supply of claim 10 , further comprising control means for controlling the primary mover in response to the auxiliary power output, wherein the control means is coupled to the primary mover and the auxiliary power means.
Claim 15
Independent Claim
35 words
A method of providing welding power comprising; generating an electrical output with an engine and generator; converting the electrical input to provide a welding output; and inverting the electrical input to provide an auxiliary output.
Claim 16
Independent Claim
35 words
A method of providing welding power comprising; generating an electrical output with an engine and generator; converting the electrical input to provide a welding output; and inverting the electrical input to provide an auxiliary output.
Claim 17
Dependent Claim
22 words
The method of claim 12 , further comprising controlling the engine using feedback indicative of an operating parameter of the auxiliary output.
Claim 18
Dependent Claim
15 words
The method of claim 13 wherein engine speed is controlled in response to the feedback.
Claim 19
Dependent Claim
23 words
The method of claim 14 wherein controlling includes the selecting between an idle speed and a run speed in response to the feedback.
Claim 20
Dependent Claim
32 words
The method of claim 15 wherein controlling includes controlling at least one of a throttle position, a fuel pump, an injection timer, a fuel to air ratio, fuel consumption and ignition timing.
Claim 21
Dependent Claim
15 words
The method supply of claim 16 wherein the inverting includes providing 60 Hz auxiliary power.
Claim 22
Dependent Claim
12 words
The method of claim 17 wherein generating includes generating three phase power.
Claim 23
Dependent Claim
12 words
The method of claim 17 wherein generating includes generating single phase power.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-10-21 | 2006-04-22 | 2006-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-10-21 | 2010-04-22 | 2010-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-10-21 | 2014-04-22 | 2014-10-22 | $7700.00 | Window Closed / Lapsed |