Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1977-05-16
1978-09-12
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 12, H02K 1914
Patent
active
041140605
ABSTRACT:
An electric motor, particularly for driving a gramophone, a tape recorder or an electric instrument at a low rotational speed whereby an induction effect is utilized to achieve good starting torque and a reluctance effect to give good torque when the motor is locked in and running synchronously. The motor includes a stator assembly with a first plurality of pairs of primary pole pieces each pair constituted by a first metal part for the energization by an in-phase current and a second plurality of pairs of primary pole pieces each pair constituted by a second metal part for energization by an out of phase current. The respective parts also define slots constituting secondary pole pieces. A rotor assembly defines a plurality of further pole pieces having a pitch corresponding to the pitch of the secondary pieces, so that when the secondary pieces associated with the first plurality are opposite to the respective ones of the further pole pieces the secondary pole pieces associated with the second plurality of pieces are displaced with respect to respective ones of the further pole pieces by the phase angle between in-phase and out-of-phase currents.
REFERENCES:
patent: 1495827 (1924-05-01), Warren
patent: 1708334 (1929-04-01), Spencer
Holt David
McLean Graham Wilson
Duggan Donovan F.
Strathearn Audio Limited
LandOfFree
Electric motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2385954