Patent ID: 8035356
Filing Date: 2011-10-11
Classification: H02J

Abstract:
1. A backup power supply, for providing energy to a coupled electrical device, said backup power supply comprising: one or more ultra capacitors, electrically coupled to a source of energy, and configured for storing said energy; a multiphase boost converter, electrically coupled to said one or more ultra capacitors and including at least one variable energy recovery time factor circuit, each said at least one variable energy recovery time factor circuit including one or more controllable electrical devices operable in one of an on condition and an off condition, wherein said on or off condition of said one or more controllable electrical devices establish a variable energy recovery time period for said at least one variable energy recovery time factor circuit, said multiphase boost converter responsive to an amount of energy presently stored by said one or more ultra capacitors in the form of a voltage level, for increasing said variable energy recovery time period as said voltage level of said energy stored by said one or more ultra capacitors decreases, for providing a relatively constant voltage from the stored energy of the one or more ultra capacitors.