Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1989-06-13
1991-01-08
Roskoski, Bernard
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02P 602
Patent
active
049838954
ABSTRACT:
Method and apparatus for operating a vacuum cleaner in which by detecting a rotational speed of a variable speed fan motor adapted to give a suction force to the cleaner and its change range, the choking state of the filter and the state of the cleaner surface are discriminated, and a speed command of the fan motor is corrected on the basis of the result of the discrimination, and the comfortable cleaning can be performed by the optimum suction force.
REFERENCES:
patent: 4415844 (1983-11-01), Mendenhall et al.
patent: 4675583 (1987-06-01), Berghammer
patent: 4748386 (1988-05-01), Nakanishi et al.
patent: 4749923 (1988-06-01), Cheing
patent: 4751438 (1988-06-01), Markunas
patent: 4797600 (1989-01-01), Savage et al.
Endo Tsunehiro
Hishi Wakichiro
Ishii Yoshitaro
Jyoraku Fumio
Koharagi Haruo
Hitachi , Ltd.
Roskoski Bernard
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