Patent ID: 6782513
Filing Date: 2004-08-24
Classification: G06F,H01F

Abstract:
A method of designing a high power factor integrated ferroresonant constant current source comprising the steps of:providing an input coil disposed about a ferromagnetic core and to be coupled to an AC voltage source; providing an output coil disposed about the core and to be coupled to a load; providing a control coil disposed about the core and coupled to a switch for regulating current output of the constant current source; providing a first capacitor coil disposed about the core and inductively coupled to the output coil and coupled to a capacitor to provide a first resonant sub-circuit having maximum gain, and a second capacitor coil disposed about the core and inductively coupled to the control coil and coupled to a capacitor to provide a second resonant sub-circuit to control resonant gain; and selecting a flux density (BPRI) of a portion of the core around the input coil that is substantially lower than flux density BCAP of a portion of the core around the capacitor coils.