Title:
【発明の名称】被制御鉄共振変圧器回路を用いた無停電電源システム、電圧レギュレータ及び動作方法
Document Type and Number:
Japanese Patent JP2002528023
Kind Code:
A
Abstract:
An uninterruptable power supply system for producing an AC voltage from at least one of a DC power source or an AC power source includes an input terminal configured to receive an AC voltage from an AC power source, and an inverter operative to produce an AC voltage at an output thereof from a DC power source. A ferroresonant transformer circuit includes a transformer having an input winding, a output winding, and a third winding that forms part of a resonant circuit that produces saturation in the output winding when an AC voltage on the input winding exceeds a predetermined amplitude. A transformer input control circuit is coupled to the input terminal and to the inverter output and is operative to couple at least one of the input terminal and the inverter output to the input winding. The transformer input control circuit variably couples the input terminal to the input winding responsive to at least one of a voltage at the input terminal, a current in the output winding, a voltage on the output winding and a current at the input terminal. Related voltage regulators and methods are also described.
Inventors:
Owton, George W, Junior
Earl, John Kyle
Earl, John Kyle
Application Number:
JP2000575203A
Publication Date:
August 27, 2002
Filing Date:
August 26, 1999
Export Citation:
Assignee:
Powerware Corporation
International Classes:
H02J9/06; (IPC1-7): H02J9/06
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)