D.C. motor

Details D.C. motor D.C. motor

1988-07-18

1990-08-14

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 46, 310 90, 310 68R, 310156, 310216, 310254, 29596, 318254, H02K 100

Patent

active

049490001

ABSTRACT:
A P.M. d.c. motor in which the permanent magnets thereof are provided as thin arcuate segments of predetermined length which rotate about a circular locus of core component defining poles. The paired permanent magnets are configured to slightly straddle the end surfaces of the core components as they pass thereover to effect a shear form of magnetic interaction with flux interaction regions or surfaces of the laminar core components. This serves to substantially minimize axially directed magnetic attractive forces including any time varying axial force terms which may be developed in consequence of commutation. Further a localize rotor balancing is achieved. A highly efficient core structure formed as a core base having outwardly extending legs which are bent perpendicularly upward to form upstanding core components is provided. Additionally, an aerodynamic seal is developed at the periphery of the rotor stator combination to provide for the isolation of any contaminants.

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patent: 4731554 (1988-03-01), Hall et al.
patent: 4745345 (1988-05-01), Petersen
patent: 4763050 (1988-08-01), Ruppert

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