Advanced Energy Industries, Inc.
Method and apparatus for changing the apparent source impedance of a generator

Abstract:

A method for controlling a generator connected to a load involving obtaining a first measured value (M1) related to a forward power calculated with respect to reference impedance (Z.sub.c). The method involves adjusting an output of the generator in order that M1 tends to a first setpoint. The method further involves adjusting the first setpoint in order to adjust a second measured value (M2) of a conventional measure of generator output towards a second setpoint, where wherein the forward power calculated with respect to the reference impedance (Z.sub.c) is equal to: .times..times..times..times. ##EQU00001## where v is a voltage at a reference point, which may be between the generator and load input, and i is a current flowing relative to the load (e.g., current toward the load or a negative value of current toward the generator) at the reference point.