U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Power factor corrected rectification

Patent 5502630 Issued on March 26, 1996. Estimated Expiration Date: Icon_subject July 19, 2014. 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.

Patent References

2999970

3215925

3223915

3284692

3746967

3796941

3845374

3889176

Power supply unit for a plasma plant
Patent #: 4224662
Issued on: 09/23/1980
Inventor: Boniger

Control device for an A.C. elevator
Patent #: 4471855
Issued on: 09/18/1984
Inventor: Nomura

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Inventor

Assignee

Application

No. 277500 filed on 07/19/1994

US Classes:

363/84, For rectifier system323/222, Using choke and switch across source363/89With transistor control means in the line circuit

Examiners

Primary: Wong, Peter S.
Assistant: Berhane, Adolf

Attorney, Agent or Firm

International Class

H02M 007/21

Abstract

A power supply is adapted to be connected to single or multiple phase power lines providing alternating current, for delivering power to a load. The supply has an energy storage device for storing and then delivering electrical energy to the load. An inductive system is adapted to be coupled to the power lines for inductively storing and discharging energy. A switching system is coupled to the inductive system for switching a flow of bidirectional current through the inductive system to alternately (a) store energy in the inductive system from the power lines and (b) convey energy from the inductive system and the power main to the energy storage device. Also included is a controller coupled to the switching system for operating it at a repetition rate exceeding that of half cycles of the power lines. The supply also includes a unidirectional conducting system having a pair of unidirectional conducting paths coupled between the inductive system and the energy storage device for steering bidirectional current from the inductive system to provide a unipolar potential at the energy storage device. The preferred embodiment shapes the line current waveform from the power lines into a sinusoid that is in phase with the voltage of the power lines to improve the power factor and reduce harmonic distortion. The preferred supply can produce a D.C. output that is regulated to be independent of line or load variations.

Other References

  • A New Zero-Voltage Transistion, Three Phase PWM Rectifier/Inverter Circuit, V. Vlatkovic, D. Borojevic, F. C. Lee, C. Cuadros, and S. Gataric, Virginia Power Electronics Center, T-1-T-6
  • A New Control Algorithm for Three-Phase PWM Buck Rectifier with Input Displacement Factor Compensation, S. Hiti, V. Vlatkovic, D. Borojevic and F. C. Lee, Virginia Power Electronics Center, pp. 19-25
  • A conceptually new high frequency switched mode power amplifier technique eliminates current ripple. Cuk et al. pp. G3-1 to G3-22 May 1978 Fifth National Solid State Power Convrsion Conference, San Francisco, C
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