Method and apparatus for controlling the number of revolutions o

Details Method and apparatus for controlling the number of revolutions o Method and apparatus for controlling the number of revolutions o

1988-05-31

1989-08-29

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318138, H02K 2910

Patent

active

048620459

ABSTRACT:
A method of controlling the number of revolutions of a motor using the output of a tachogenerator, which determines the number of revolutions of the rotor, to regulate the motor. To improve the accuracy of such prior art regulating methods, which are limited by the mechanical tolerances of the tachogenerator elements, the actual time differences between pulses corresponding to respective fixed points on the rotor circumference during a revolution of the rotor are measured. The sequence of the pulses constituting the actual time differences is compared with a desired time difference sequence and a signal to control the driving motor is derived from this comparison.

REFERENCES:
patent: 3683248 (1972-08-01), Kobayashi et al.
patent: 4348585 (1982-09-01), Hoffman
patent: 4366399 (1982-12-01), Furuhata
patent: 4409530 (1983-10-01), Neeper et al.
patent: 4506202 (1985-03-01), Tajima et al.
patent: 4570110 (1986-02-01), Bloom et al.
patent: 4600866 (1986-07-01), Seto

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