Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2005-06-28
2005-06-28
Nguyen, Matthew V. (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
Reexamination Certificate
active
06912142
ABSTRACT:
An alternator system having an alternating current (ac) voltage source includes a switched-mode rectifier (SMR) coupled to the ac voltage source and having an output port coupled to an output of the alternator system, and a controller coupled to said switched-mode rectifier so as to provide a controlled pulse sequence synchronized with an angular rotor position of the (ac) voltage source to activate and deactivate the switched-mode rectifier. The controller further includes a PWM generator having a first input to receive a total duty ratio signal synchronized with an angular rotor position of the (ac) voltage source. The switched mode rectifiers are controlled to increase power output levels at lower speeds near idle. The controller combines improved idle speed power output levels with load matching improvements from PWM control for more efficient operation when compared to circuits using conventional control or PWM load matching control alone.
REFERENCES:
patent: 4507724 (1985-03-01), Glennon
patent: 4701692 (1987-10-01), Takeuchi et al.
patent: 4825139 (1989-04-01), Hamelin et al.
patent: 5151641 (1992-09-01), Shamoto
patent: 5170310 (1992-12-01), Studtmann et al.
patent: 5177677 (1993-01-01), Nakata et al.
patent: 5248935 (1993-09-01), Fukuda
patent: 5256959 (1993-10-01), Nagano et al.
patent: 5319299 (1994-06-01), Maehara
patent: 5495162 (1996-02-01), Rozman et al.
patent: 5663631 (1997-09-01), Kajiura et al.
patent: 5696430 (1997-12-01), Erdman et al.
patent: 5705917 (1998-01-01), Scott et al.
patent: 5726557 (1998-03-01), Umeda et al.
patent: 5731693 (1998-03-01), Furmanczyk
patent: 5793625 (1998-08-01), Balogh
patent: 5801516 (1998-09-01), Rice et al.
patent: 5942818 (1999-08-01), Satoh et al.
patent: 5946202 (1999-08-01), Balogh
patent: 5946203 (1999-08-01), Jiang et al.
patent: 5966001 (1999-10-01), Maehara et al.
patent: 6031739 (2000-02-01), He et al.
patent: 6140803 (2000-10-01), Hurley et al.
patent: 6236183 (2001-05-01), Schroeder
patent: 6249101 (2001-06-01), Viti et al.
patent: 6317346 (2001-11-01), Early
patent: 6650083 (2003-11-01), Jung
patent: 195 19 298 (1996-11-01), None
patent: 0 493 848 (1992-07-01), None
patent: 0 693 816 (1996-01-01), None
patent: 0 778 662 (1997-06-01), None
patent: 0 849 112 (1998-06-01), None
patent: WO 98/28832 (1998-07-01), None
Search Report for PCT/US01/01669.
Esam Hamid Ismail et al. “Single-Switch 3Ø PWM Low Harmonic Rectifers”, IEEE Transactions On Power Electronics. vol. 11 No. 2, Mar. 1996, pp.338-346.
Vahe Caliskan et al. “Analysis of Three-Phase Rectifiers with Constant-Voltage Loads”, this paper appears in Power Electronics Specialists Conference, PESC 99. 30thAnnual IEEE on pp. 715-720, vol, 2.27 Jun. 27-Jul. 1, 1999.
G. Venkataramanan et al. “Variable Speed Operation of Permanent Magnet Alternator Wind Turbines Using a Single Switch Power Convertor”, Journal of Solar Energy-Transactions of the Asme vol. 118 No. 4, Nov. 1996, pp. 235-238.
A.R. Prasad et al. “An Active Power Factor Correction Technique for Three-Phase Diode Rectifiers” IEEE Transaction Power Electronics, vol. 6 No. 1 Jan. 1991, pp. 83-92.
Keim Thomas A.
Perreault David J.
Daly, Crowley & Mofford & Durkee, LLP
Massachusetts Institute of Technology
Nguyen Matthew V.
LandOfFree
Alternator control circuit and related techniques does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Alternator control circuit and related techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alternator control circuit and related techniques will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3486307