초록 ▼

A plasma arc cutting power supply, and method of providing plasma cutting power, is disclosed. It includes a source of power having, preferably an engine or transformer based power source, that provides a main power output and an auxiliary power output. A two-state configuration circuit is in electr

A plasma arc cutting power supply, and method of providing plasma cutting power, is disclosed. It includes a source of power having, preferably an engine or transformer based power source, that provides a main power output and an auxiliary power output. A two-state configuration circuit is in electrical communication with the auxiliary power output. The auxiliary power output receives voltage of a first magnitude with a non-floating ground when the configuration circuit is in its first state. The auxiliary power output receives voltage of a second magnitude, preferably different than the first magnitude, with a floating ground, when the configuration circuit is in its second state. When a plasma cutting circuit is connected to the auxiliary power output the configuration circuit is set in its second state. The plasma cutting circuit includes at least one chopper. A safety circuit that disables the plasma output includes a GFI or optical isolator.

대표청구항 ▼

[ What is claimed is:] [1.]1. A plasma cutter for providing a plasma cutting output to a work terminal and a cutting terminal, comprising:a power input circuit;a plasma cutting circuit in electrical communication with the power input circuit; anda configuration circuit in electrical communication wi

[ What is claimed is:] [1.]1. A plasma cutter for providing a plasma cutting output to a work terminal and a cutting terminal, comprising:a power input circuit;a plasma cutting circuit in electrical communication with the power input circuit; anda configuration circuit in electrical communication with the power input circuit, wherein the configuration circuit provides a configuration control signal when a predetermined power is applied to the power input circuit, and further wherein the configuration circuit has a first state in which the power input circuit provides a voltage of a first magnitude and has a non floating ground in response to the plasma cutting circuit not being connected to the power input circuit, and wherein the configuration circuit has a second state in which the power input circuit provides a voltage of a second magnitude and has a floating ground in response to the plasma cutting circuit being connected to the input power circuit.