Operation of an electrical machine

Details Operation of an electrical machine Operation of an electrical machine

2006-06-06

2006-06-06

Duda, Rina (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S434000, C318S453000, C318S811000

Reexamination Certificate

active

07057362

ABSTRACT:
An electrical machine is controlled without using a physical rotor position detector. When the demanded torque output is low, a control method causes the machine to operate on fewer than all the phases, thus increasing the phase current and improving the resolution of the position detection algorithm. The method can include sampling the phase current of the machine, determining whether the phase current is above a predetermined threshold, reducing the number of active phases, and then deriving the value of rotor position from the increased phase current in the remaining phases.

REFERENCES:
patent: 4434389 (1984-02-01), Langley et al.
patent: 4868478 (1989-09-01), Hedlund et al.
patent: 5467025 (1995-11-01), Ray
patent: 5923141 (1999-07-01), McHugh
patent: 6051942 (2000-04-01), French
patent: 6351094 (2002-02-01), Green
patent: 6366865 (2002-04-01), Chalupa et al.
patent: 6396237 (2002-05-01), Mayes
patent: 6448736 (2002-09-01), Lajsner et al.
patent: 6456031 (2002-09-01), Gallegos-Lopez et al.
patent: 6472842 (2002-10-01), Ehsani
patent: 6498447 (2002-12-01), Mann et al.
patent: 6623245 (2003-09-01), Meza et al.
patent: 6646407 (2003-11-01), Rahman et al.
patent: 6653811 (2003-11-01), Branecky
patent: 6674260 (2004-01-01), Harriman et al.
patent: 6586903 (2004-05-01), Moriarty
patent: 6731083 (2004-05-01), Marcinkiewicz
patent: 6801012 (2004-10-01), Mir et al.
patent: 6853163 (2005-02-01), Slater
patent: 6897591 (2005-05-01), Peachee et al.
patent: 30 42 927 (1982-06-01), None
patent: 1 109 309 (2001-06-01), None
patent: WO 91/02401 (1991-02-01), None
Matsuo, T., et al., “Rotor Position Detection Scheme for Synchronous Reluctance Motor based on Current Measurements,” IEEE 1994, pp. 627-634.
Mvungi, N.M., et al., “Accurate Sensorless Rotor Position Detection in a SR Motor,” EPE Firenze, vol. 1, 1991, pp. 390-393.
Ray, W.F., et al., “Sensorless Methods for Determining the Rotor Position of Switched Reluctance Motors,” EPE Brighton, 1993, vol. 6, pp. 7-13.
Stephenson, et al., “The Characteristics, Design and Applications of Switched Reluctance Motors and Drives,” PCIM '93, Nürnberg, Germany, Conference & Exhibition, Jun. 21-24, 1993, pp. 1-68.
Search Report for European Patent Application No. 04256902.

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