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US 2003/0111920 A1Published application
Electric motor
AssigneeJohnson Electric S.A.
InventorJames Ching Sik Lau
Life of this patent
Estimating the term…
Abstract
A PMDC motor 10 with a speed sensor 20 has a cup-like deep drawn rear housing 18. The speed sensor 20 is located at the bottom of the housing 18 and has an annular base plate 21 supporting a coil 22 with a steel pin core 27. The coil 22 is connected to two terminals of a connector 23 mounted on the base plate 21. The connector 23 is aligned with a window 26 in the rear housing 18.
Claims12
A PMDC motor comprising:
- an armature including a shaft;
- a housing having an open end and a closed end;
- an end cap fitted to the open end of the housing and supporting motor terminals and brush gear;
- at least one permanent magnet fitted inside the housing and forming the stator;
- a speed sensor having a base plate, a sensor coil fixed to the base plate and sensor terminals connected to the sensor coil for connecting the sensor coil to external lead wires;
- wherein
- the speed sensor is located within the housing with the base plate adjacent the closed end of the housing.
4 more elements
Dependencies are inferred from the claim text.