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US Patent 5502630 - Power factor corrected rectification

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

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

Field of Search

363/67, Plural rectifiers363/68, In series (e.g., series SCR's, bridge circuits, etc.)363/69, In parallel363/84, For rectifier system363/87, For plural phase to D.C. rectifier363/89, With transistor control means in the line circuit363/44, In rectifier systems323/207, Using converter323/220, IN SHUNT WITH SOURCE OR LOAD323/222Using choke and switch across source

Examiners

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

Attorney, Agent or Firm

US Patent References

2999970, 3215925, 3223915, 3284692, 3746967, 3796941, 3845374, 3889176, 4224662, Power supply unit for a plasma plant
Issued on: 09/23/1980
Inventor: Boniger
4471855, Control device for an A.C. elevator
Issued on: 09/18/1984
Inventor: Nomura
4533986, Compact electrical power supply for signal processing applications
Issued on: 08/06/1985
Inventor: Jones
4672526, Rectifying circuit arrangement for generating at least one controllable direct voltage from at least one alternating voltage
Issued on: 06/09/1987
Inventor: Mehnert ,   et al.
4677366, Unity power factor power supply
Issued on: 06/30/1987
Inventor: Wilkinson ,   et al.
4831508, Power supply system having improved input power factor
Issued on: 05/16/1989
Inventor: Hunter
4940929, AC to DC converter with unity power factor
Issued on: 07/10/1990
Inventor: Williams
5003454, Power supply with improved power factor correction
Issued on: 03/26/1991
Inventor: Bruning
5059887, Step-up and step-down chopper device
Issued on: 10/22/1991
Inventor: Iida, et al.
5119283, High power factor, voltage-doubler rectifier
Issued on: 06/02/1992
Inventor: Steigerwald, et al.
5181159, AC to DC converter having an enhanced power factor
Issued on: 01/19/1993
Inventor: Peterson, et al.
5224025, Forward converter with two active switches and unity power factor capability
Issued on: 06/29/1993
Inventor: Divan, et al.
5373195, Technique for decoupling the energy storage system voltage from the DC link voltage in AC electric drive systems
Issued on: 12/13/1994
Inventor: De Doncker, et al.
5383109High power factor boost rectifier apparatus
Issued on: 01/17/1995
Inventor: Maksimovic, et al.

International Class

H02M 007/21

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