Stabilizing power supply apparatus

Patent 4460955 Issued on July 17, 1984. Estimated Expiration Date:

December 22, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3200328

3246170

3624405

Regulated power supply system including saturable reactor means
Patent #: 4217632
Issued on: 08/12/1980
Inventor: Bardos , et al.

Power supply regulator circuit employing a transformer having a control winding Patent #: 4375077
Issued on: 02/22/1983
Inventor: Williams

Inventors

Assignee

Fanuc Ltd.

Application

No. 06/452139 filed on 12/22/1982

US Classes:

363/91, Saturable reactor (e.g., magnetic amplifier)323/254With electronic tube or a three or more terminal semiconductive device in control circuit

Examiners

Primary: Shoop, William M.

Attorney, Agent or Firm

Staas & Halsey

International Classes

G05F 1/10 (20060101)
G05F 1/38 (20060101)
G05F 1/44 (20060101)

Foreign Application Priority Data

1981-12-25 JP

Abstract

A stabilizing power supply apparatus including, as a switching element, a magnetic amplifier supplied with a rectangular wave voltage produced by an inverter and controlled by a reset current. An error sensing circuit senses a difference between the output voltage of the magnetic amplifier and a reference voltage to produce an error signal corresponding to the sensed difference. An amplifier circuit amplifies the error signal into the reset current for the magnetic amplifier. The amplifier circuit includes a NPN-type transistor for amplifying the control current into the reset current and first and second diodes. The first diode has an anode terminal connected to a negative power supply line and a cathode terminal connected to the collector of the transistor in order that charge will not accumulate on the transistor base. The second diode has an anode terminal connected to the emitter of the transistor and a cathode terminal connected to the magnetic amplifier. The reset current is applied to the magnetic amplifier through the second diode to hold the output voltage of the apparatus constant by regulating the on/off timing of the magnetic amplifier in accordance with the difference between the magnitude of the output voltage and the magnitude of the reference voltage.