Power reduction circuit for engine acceleration

Details Power reduction circuit for engine acceleration Power reduction circuit for engine acceleration

1999-02-26

2000-09-19

Ponomarenko, Nick

Prime-mover dynamo plants

Electric control

Engine control

322 29, 219133, B23K 9095

Patent

active

061216917

ABSTRACT:
A method and apparatus for providing welding power from an engine/generator driven welding power supply includes an engine and a generator. A welding power supply is connected to the generator output, and provides welding power. A controller controls the apparatus, and receives an RPM input signal indicative of the engine RPM, and a user selected magnitude input. The controller includes an output reduction circuit that reduces the magnitude of the welding power by a variable amount in the event the engine is likely to stall, so as to reduce the likelihood of a stall, but maintain sufficient power for a welding arc. The magnitude of the welding power is reduced by an amount responsive to the engine speed in the event that the engine RPM is less than an RPM threshold, and/or by an amount responsive to the user selectable setting in the event that the user selectable setting is greater than a threshold. The power reduction may be responsive and/or proportional to the difference between the actual value and the threshold, and continuous or done in steps. The output reduction circuit controls the generator field current or the load current command to reduce the welding power.

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