Back to results
US 8,274,189 B2Granted
Motor and window lift
AssigneeJohnson Electric S.A.
InventorsRui Feng Qin, Ji Yu Liang, Di Wang, Yuan Jiang, Cheng Shun Du
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeJohnson Electric S.A.
InventorsRui Feng Qin, Ji Yu Liang, Di Wang, Yuan Jiang, Cheng Shun Du
Estimating the term…
A window lift has a motor and a gearbox. The motor is a permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator. The stator or the rotor comprises a housing and magnets fixed to inner surface of the housing. The radial cross section of the housing comprises n side portions and n connecting portions, where n is an integer greater than 2. Adjacent side portions are connected together by one corresponding connecting portion and the magnets are fixed at portions corresponding to the connecting portions. The radial cross section of each side portion is like a convex curve line, which is curved outwardly relative to a straight line passing through the two ends of the convex curve line.
A permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator, one of the stator and the rotor comprising a housing and at least one magnet providing magnetic poles fixed to an inner surface of the housing, a radial cross section of the housing comprising n side portions and n connecting portions, where n is an integer greater than 2, adjacent side portions being connected together by one corresponding connecting portion, and the magnetic poles being located at locations corresponding to the connecting portions, wherein each of two circumferential ends of the radial cross section of each side portion has a curvature different from that of the radial cross section of each connection portion, and the radial cross section of each side portion is like a convex curve line, which is curved outwardly with respect to a straight line passing through the two circumferential ends of the convex curve line.
A permanent magnet motor, comprising a stator and a rotor rotatably mounted to the stator, one of the stator and the rotor comprising a housing and at least one magnet providing magnetic poles fixed to an inner surface of the housing, a radial cross section of the housing comprising n side portions and n connecting portions, where n is an integer greater than 2, adjacent side portions being connected together by one corresponding connecting portion, and the magnetic poles being located at locations corresponding to the connecting portions, wherein each of the connecting portions has a constant curvature, and each of two circumferential ends of the side portion has a curvature different from that of the connecting portion, each side portion is like a convex curve line, which is curved outwardly with respect to a straight line passing through the two ends of the convex curve line.
Dependencies are inferred from the claim text.