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US 2012/0069460 A1Published application
Permanent magnet electric motor
AssigneeJohnson Electric S.A.
InventorsYue LI, Mao Xiong JIANG, Jian ZHAO, Yong LI, Hai Jun HUA
Life of this patent
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Abstract
A permanent magnet electric motor includes a rotor and a stator magnetically coupled to the rotor. The rotor includes a shaft, a rotor core fixed to the shaft and having n teeth, n being an integer, a commutator fixed to the shaft adjacent the rotor core and having m segments, m being an even number less than n. Rotor windings are wound about the teeth and connected to the segments. The stator includes a plurality of permanent magnets surrounding the rotor core and brushes in sliding electrical contact with the commutator.
Claims9
A permanent magnet electric motor comprising:
- a rotor having a shaft, a rotor core fixed to the shaft and having n teeth, a commutator fixed to the shaft adjacent the rotor core and having m segments, and rotor windings wound about the teeth and connected to the segments;
- a stator magnetically coupled to the rotor, the stator having a plurality of permanent magnets surrounding the rotor core;
- and
- brushes in sliding electrical contact with the commutator;
- wherein m and n are integers, m being an even number less than n.
2 more elements
Dependencies are inferred from the claim text.