Permanent magnet stator for D.C. motors

Details Permanent magnet stator for D.C. motors Permanent magnet stator for D.C. motors

1980-07-21

1982-02-16

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

H02K 2304

Patent

active

043160999

ABSTRACT:
In a high starting torque D.C. magnetic motor the back e.m.f. is greatly reduced by reducing the area of magnetic flux acting on the rotor to an arc of the rotor circumference spanning the number of the rotor segments spanned by the respective rotor brush contacting the cooperating commutator segments. At least one rotor is coaxially supported adjacent and in axial alignment with coaxial apertures in parallel spaced-apart nonmagnetic end plates. A plurality of equally spaced elongated permanent magnets, connected with the respective end plate, extend parallel with the axis of the rotor and in close spaced relation with respect to circumferential portions of its periphery.

REFERENCES:
patent: 374959 (1887-12-01), Gray
patent: 3723796 (1973-03-01), Mason
patent: 3757149 (1973-09-01), Holper
patent: 3828213 (1974-08-01), Yamashita et al.

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