Inventors:
Thomas W. Gow - Elkton SD, US
Edward L. Schwarz - Minneapolis MN, US
International Classification:
H01F 1/00, H01F 3/00, H02J 1/16, H02J 3/30
US Classification:
307 68, 307 43, 307 66, 307 72, 322 28, 322 29, 322 44, 322 46, 322 71, 363 32, 363 73, 363164, 363178
Abstract:
An emergency power system for operation during loss of power on power mains comprises a spring-driven energy storage unit (ESU) and a generator. The ESU enters a generator mode responsive to a power outage state of a power sensor, during which mode unwinding of the spring drive powers the generator. After power is restored to the mains, a preferred embodiment automatically rewinds the spring using the generator as a motor.