Multi-pole permanent magnet rotor

Details Multi-pole permanent magnet rotor Multi-pole permanent magnet rotor

1978-09-18

1981-04-07

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 49R, 310268, 310 68R, H02K 2112

Patent

active

042609208

ABSTRACT:
A disk-shaped magnet attached to a rotary shaft is circumferentially segmented into a plurality of segments which are magnetized to form driving magnetic poles. A plurality of velocity detecting magnetic poles are also arranged on the disk-shaped magnet concentrically to the driving magnetic poles. The number of the velocity detecting magnetic poles is larger than the number of the driving magnetic poles to increase the frequency of an output signal of a velocity detecting coil which interlinks with the velocity detecting magnetic poles so that a response speed of a velocity control circuit is increased.

REFERENCES:
patent: 4093897 (1978-06-01), Fujita et al.
patent: 4109170 (1978-08-01), Fujita et al.

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