Patent ID: 6710314
Filing Date: 2004-03-23
Classification: B23K

Abstract:
An induction heating apparatus, comprising:(a) an induction work coil; (b) an oscillator circuit that supplies a first alternating current to said work coil; (c) an inverter circuit that supplies a second alternating current to said oscillator circuit; (d) an input power circuit that supplies a third electrical current to said inverter circuit; and (e) a controller circuit; wherein said inverter circuit exhibits an output side that is in electrical communication with said oscillator circuit and an input side that is in electrical communication with said input power circuit; and wherein said controller circuit is configured to control a power magnitude provided by said oscillator circuit to said work coil by monitoring an electrical power magnitude at a location on the input side of said inverter circuit, thereby operating said heating apparatus in a feed-forward configuration.