Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1999-01-21
2000-05-02
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310155, 310168, 310257, 310268, 310214, 310156, 310261, 310180, 310179, H02K 100
Patent
active
060576227
ABSTRACT:
A method and apparatus for field weakening in PM machines uses field weakening coils (35, 44, 45, 71, 72) to produce flux in one or more stators (34, 49, 63, 64), including a flux which counters flux normally produced in air gaps between the stator(s) (34, 49, 63, 64) and the rotor (20, 21, 41, 61) which carries the PM poles. Several modes of operation are introduced depending on the magnitude and polarity of current in the field weakening coils (35, 44, 45, 71, 72). The invention is particularly useful for, but not limited to, the electric vehicle drives and PM generators.
REFERENCES:
patent: 3613532 (1971-10-01), Wildhaber
patent: 3702965 (1972-11-01), Drexler et al.
patent: 3761847 (1973-09-01), Strubin
patent: 4338557 (1982-07-01), Wanlass
patent: 4639626 (1987-01-01), McGee
patent: 4654551 (1987-03-01), Farr
patent: 5808392 (1998-09-01), Sakai et al.
patent: 5818139 (1998-10-01), Yamagiwa et al.
patent: 5825113 (1998-10-01), Lipo et al.
S. Morimoto, Y. Takeda, T. Hirasa, and K. Taniguchi, "Expansion of Operating Limits for Permanent Magnet by Current Vector Control Considering Inverter Capacity," IEEE Transactions on Industry Applications, vol. 26, No. 5, Sep./Oct. 1990, pp. 866-871.
W.L. Soong and T.J.E. Miller, "Field-Weakening Performance of Brushless Synchronous AC Motor Drives," pp. 331-340, IEEE Proc.-Electr. Power Appl., vol. 141, No. 6, Nov. 1994.
Chandra S. Namuduri, Bslarama V. Murty, "High Power Density Electric Drive for an Hybrid Electric Vehicle," Conference Proceedings, APEC'98, vol. 1, pp. 34-40, 98CH36154, Feb. 15-19, 1998, The Disneyland Hotel, Anaheim, California.
Y. Sozer, D.A. Torrey, "Adaptive Flux Weakening Control of Permanent Magnet Synchronous Motors," pp. 475-482, Conference Record, 1998 IEEE Industry Applications Conference, vol. 1, Oct. 12-15, 1998, St. Louis, Missouri.
T. Sebastian, G.R. Slemon, "Operating Limits of Inverter-Driven Permanent Magnet Motor Drives," pp. 800-805, CH2272-3/86, IEEE.
Lam Thanh
Lockhead Martin Energy Research Corporation
Ramirez Nestor
LandOfFree
Direct control of air gap flux in permanent magnet machines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direct control of air gap flux in permanent magnet machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct control of air gap flux in permanent magnet machines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1596036