Brushless DC motor inner tachometer

Details Brushless DC motor inner tachometer Brushless DC motor inner tachometer

1988-04-08

1989-11-28

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310171, 310 43, H02K 1100

Patent

active

048840009

ABSTRACT:
A collectorless DC motor with a horizontal air gap, particularly a low-speed motor for a direct drive of recording and/or reproducing devices has its rotor axle supported within an axial bore of the motor housing, with the motor housing made of plastic. A tachogenerator is disposed about the inner cylinder formed by the rotating permanent magnet ring of the motor. The stator winding and the magnetic return structure are fixedly arranged on the motor housing, which is also provided with bores for attaching the motor or installing it into the device. Obviating of machining sequences, simplification of assembly and direct support of the rotor axle in the motor housing all contribute to a reduction in manufacturing cost.

REFERENCES:
patent: 4115715 (1978-09-01), Muller
patent: 4174484 (1979-11-01), Schmider
patent: 4303844 (1981-12-01), Suzuki

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