Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1976-01-28
1978-02-14
Rubinson, Gene Z.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318254, 318439, H02K 2900
Patent
active
040741737
ABSTRACT:
The invention relates to a collectorless d.c. machine which is provided with a disc which rotates with the rotor, in which disc magnetically coded tracks are provided which co-operate with magneto-sensitive elements for selectively energizing the stator coils depending on the rotor position. The invention in particular relates to a three-phase motor, while on a disc on the rotor shaft two magnetic codes are provided which are shifted through 120.degree. relative to each other. The magnetic codes are separately detected by a magneto-sensitive element. The two elements together with the associated electronic circuitry which amplifies the two signals and produces a third signal which has a 120.degree. phase shift relative to the two other signals, take the form of one integrated circuit. The invention relates to an electric machine comprising an electronic commutator and a rotor which at least partly consists of a magnetic material and co-operates with stationary stator coils. This machine is provided with a number of magneto-sensitive elements, in particular Hall elements, for selectively applying electric current to the stator coils depending on the rotor position.
REFERENCES:
patent: 3681669 (1972-08-01), Ayers
patent: 3720865 (1973-03-01), Bregeault
patent: 3831071 (1974-08-01), Mitsui
patent: 3898544 (1975-08-01), Tanikoshi
patent: 3900780 (1975-08-01), Tanikoshi
patent: 3903463 (1975-09-01), Kanamori
Franzblau Bernard
Rubinson Gene Z.
Trifari Frank R.
U.S. Philips Corporation
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