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US Patent 5502630 - Power factor corrected rectification
US Patent Issued on March 26, 1996
Estimated Patent Expiration Date:
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.
Estimated Patent Expiration Date:
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.AbstractA 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
| InventorAssigneeApplicationNo. 277500 filed on 07/19/1994US Classes:363/84, For rectifier system323/222, Using choke and switch across source363/89With transistor control means in the line circuitField of Search363/67, 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 sourceExaminersPrimary: Wong, Peter S.Assistant: Berhane, Adolf Attorney, Agent or FirmUS Patent References2999970, 3215925, 3223915, 3284692, 3746967, 3796941, 3845374, 3889176, 4224662, Power supply unit for a plasma plantIssued on: 09/23/1980 Inventor: Boniger4471855, Control device for an A.C. elevator Issued on: 09/18/1984 Inventor: Nomura4533986, Compact electrical power supply for signal processing applications Issued on: 08/06/1985 Inventor: Jones4672526, 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: Hunter4940929, AC to DC converter with unity power factor Issued on: 07/10/1990 Inventor: Williams5003454, Power supply with improved power factor correction Issued on: 03/26/1991 Inventor: Bruning5059887, 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 ClassH02M 007/21 |
