Brushless DC electric motor and tachogenerator assembly

Details Brushless DC electric motor and tachogenerator assembly Brushless DC electric motor and tachogenerator assembly

1984-12-13

1986-03-25

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310268, 310156, 318254, H02K 1100

Patent

active

045786062

ABSTRACT:
A brushless, self-commutating DC motor including a tachogenerator for producing speed control signals, the motor having a cup-shaped housing fixed to an output shaft and carrying a cylindrical annular permanent magnet. The motor also includes a stator assembly having six rotor drive coils paired to provide a three phase driving coil system and a tachogenerator yoke and coil assembly forming part of the stator system. The rotor magnet has two tracks of multipolarization formed of an outer track of a plurality of driving magnetic poles and an inner track of tachogenerator magnetic poles of a greater number than the driving poles.

REFERENCES:
patent: 3868521 (1978-02-01), Schlicker
patent: 4174484 (1979-11-01), Schmider
patent: 4237394 (1980-12-01), Aoki
patent: 4260920 (1981-04-01), Nakamura
patent: 4366405 (1982-12-01), Schmider
patent: 4385249 (1983-05-01), Fukushima
patent: 4394594 (1983-07-01), Schmider

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