Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1998-02-13
1999-08-17
Ip, Paul
Electricity: motive power systems
Switched reluctance motor commutation control
318798, 318560, 318561, 369 50, 369 59, H02P 528, G11B 509
Patent
active
059398493
ABSTRACT:
In a motor speed controller (which, in accordance with rotations of a rotor having a drive magnet, detects an induced voltage in each of drive coils in m phases less than the number of drive magnets wound around a stator, generates speed signals which includes m square wave pulses at every 360.degree. in electrical angle, based on the induced voltage, and controls motor driving voltage applied to each of the drive magnets according to the speed signals), the present invention employs a configuration comprised of: period detecting circuit for detecting periods between rising edges or falling edges of a pulse that occurs every (P-1) pulse of the pulses included in the speed signals; speed deviation signal generating circuit for generating speed deviation signals, comparing detected periods to a predetermined reference period; and drive control circuit for correcting the motor drive voltage, which is applied to said drive coils, based on the speed deviation signals so that the rotating speed of the rotor meets a targeted rotating speed.
REFERENCES:
patent: 4445087 (1984-04-01), Mehnert
patent: 4449191 (1984-05-01), Mehnert
patent: 5175479 (1992-12-01), Tajima et al.
patent: 5473239 (1995-12-01), Kobayashi et al.
patent: 5796691 (1998-08-01), Furukawa et al.
Ip Paul
Sankyo Seiki Mfg. Co. Ltd.
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