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US 2012/0274170 A1Published application
Electric motor
AssigneeJohnson Electric S.A.
InventorsYue Li, Li Sheng Liu, Yong Qing Qi, Hong Jian Zhang
Life of this patent
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Abstract
A brush direct current motor has a stator with a plurality of coils that correspond to a number of stator windings, a rotor with a number of poles, and a commutator. The commutator is connected to a first terminal of a direct current power source to convert the power into N phase alternating current. One end of each stator winding is connected to a respective phase of the alternating current via a brush and the other ends of the stator windings are connected to the second terminal of the direct current power source.
Claims12
A brush direct current motor, comprising:
- a stator comprising a plurality of teeth and a plurality of coils wound around the teeth and corresponding to N phases;
- a rotor coupling the stator, the rotor comprising a shaft, a rotor core fixed to the shaft and P salient poles made of magnetically conductive material and protruding from the shaft toward the teeth;
- a first brush;
- N second brushes;
- and
- a commutator fixed to the shaft;
- wherein the commutator comprises a first conductive ring, P first bars extending from the first conductive ring;
- wherein the first brush is arranged to be electrically connected to a first terminal of a direct current power source and is arranged to make continuous sliding electrical contact with the first conductive ring, and the second brushes are arranged to make sliding electrical contact with the first bars;
- and
- wherein one end of each phase is respectively connected to one of the N second brushes, and the other ends of each phase are arranged to be electrically connected to a second terminal of the direct current power source.
7 more elements
Dependencies are inferred from the claim text.