Brushless DC drive motor for signal recording means

Details Brushless DC drive motor for signal recording means Brushless DC drive motor for signal recording means

1983-05-26

1985-07-23

Shoop, William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 310 68R, H02K 2902

Patent

active

045310793

ABSTRACT:
A brushless DC motor is provided having at least four stator poles and a rotor. The rotor has a permanent magnet system that includes at least two pair of poles and a device for the detection of the rotor position. A commutation circuit is mounted on the stator and is controlled by the rotor position detection device. To generate an exact position signal of the rotor, a first detection pulse per mechanical revolution and a second detection pulse, displaced with respect to the first by 180 mechanical degrees and differentiatable from the first, are provided.

REFERENCES:
patent: 3840761 (1974-10-01), Muller
patent: 3873897 (1975-03-01), Muller
patent: 3883633 (1975-05-01), Kohler
patent: 4125792 (1978-11-01), Schmider
patent: 4125796 (1978-11-01), Nagase et al.
patent: 4174484 (1979-11-01), Schmider
patent: 4211963 (1980-07-01), Muller
patent: 4366405 (1982-12-01), Schmider
patent: 4371817 (1983-02-01), Muller

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