Polyphase electric motor

Details Polyphase electric motor Polyphase electric motor

2006-08-15

2006-08-15

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

07091643

ABSTRACT:
An electric motor has a stator (28) and a rotor (36′) separated therefrom by an air gap (39). The rotor has a plurality of salient poles with pole shoes (260A) facing toward the air gap, and a yoke (200). The pole shoes serve to generate a sinusoidal counter-EMF. Located between the yoke (200) and a pole shoe (260A) is a recess (266A) in which a permanent magnet (262A) is arranged. Adjacent to this recess (266A) on each side in the circumferential direction is a low-magnetic-conductivity region (266A′,266A″) that is bounded by a retaining segment (270′) made of ferromagnetic material. The latter serves to connect the pole shoe mechanically to the yoke (200). A magnetic shunt (274′, 274″) extends from a source segment (264A′,264A″) to a target region (270′″) of one of the retaining segments.

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