초록 ▼

A method and apparatus for providing a welding output is disclosed. The apparatus includes a an ac generator having a field winding, a welding output winding and an electronic field controller connected to the field winding. The controller receives a current feedback signal and a voltage feedback si

A method and apparatus for providing a welding output is disclosed. The apparatus includes a an ac generator having a field winding, a welding output winding and an electronic field controller connected to the field winding. The controller receives a current feedback signal and a voltage feedback signal, and shapes the output curve in response to the desired output command signals. According to one embodiment the controller also receives a field current feedback signal. The controller may shape the output curves to emulate a DC generator, for example by causing the welding output V-A curves to have multiple breakpoints, and/or a substantially preset slope over a welding range wherein the preset slope does not vary over the output current range of the power supply. Also, the slope of the V-A output curve below the welding range may be different than the slope in the welding range. An auxiliary output winding having a substantially constant voltage may be provided on the generator and the generator may be either single or three phase.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An ac generator driven welding power supply for providing a welding output comprising:a generator, including a field winding and a welding output winding; andan electronic field co

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] An ac generator driven welding power supply for providing a welding output comprising:a generator, including a field winding and a welding output winding; andan electronic field controller connected to the field winding, and having a current feedback input and a voltage feedback input;wherein the current feedback input and voltage feedback input are disposed to receive signals representative of the welding output; andfurther wherein the electronic field controller shapes the volt-ampere output curve of the welding output, for each of a plurality of selected nominal output currents, to provide at least one breakpoint for each volt ampere curve.