Patent ID: 7847664
Filing Date: 2010-12-07
Classification: H01F,H02J

Abstract:
1. An electromagnetic circuit comprising: a primary coil wound on a primary core of magnetically permeable material, the primary core energized by an AC voltage; at least two secondary circuits, each having a secondary coil assembly wound on a secondary core of magnetically permeable material, the primary and secondary cores arranged as a parallel magnetic circuit; each of the coil assemblies comprising a secondary coil wound in series, on a common said secondary core with a pair of control coils, the control coils positioned on opposing sides of the secondary coil, wherein the control coils are wound in a reverse sense with respect to each other, and each of the control coils shunted by a resistor; the secondary circuits each further providing a diode positioned between the coil assembly and an electrically parallel arrangement of a battery and a load.