Three-phase motor with overlapping coils and fan
AssigneeDelta Electronics, Inc.
InventorsChin-Chun Lai, Kun-Fu Chuang, Shin-Ming Huang
Life of this patent
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Abstract
A three-phase motor includes a bearing structure, a rotor structure and a stator structure. The bearing structure has a bushing. The rotor structure has a shaft disposed in the bushing. The stator structure is disposed corresponding to the rotor structure and includes a first coil assembly and a second coil assembly overlapped on the first coil assembly. A fan with the motor is also disclosed. The present invention can increase the ratio of the effective coils of the stator structure, and further promote the operation efficiency of the three-phase motor and the fan with the three-phase motor.
Claims17
A three-phase motor comprising:
- a bearing structure comprising a bushing;
- a rotor structure comprising a shaft and a magnetic body, wherein the shaft is disposed in the bushing;
- and
- a stator structure disposed corresponding to the rotor structure and comprising a first coil assembly and a second coil assembly overlapped on the first coil assembly,
- wherein the first coil assembly comprises a plurality of first coils and the second coil assembly comprises a plurality of second coils, the magnetic body is disposed corresponding to the stator structure,
- wherein one of the first coils of the first coil assembly and one of the second coils of the second coil assembly having the same phase are disposed relative to each other with an included angle,
- wherein the included angle and the pole pair number of the magnetic body comply with the equation:
- θm=2×180°/P, wherein θm is the included angle, and P is the pole pair number of the magnetic body.
A fan comprising:
- a three-phase motor comprising:
- a bearing structure comprising a bushing,
- a rotor structure comprising a shaft and a magnetic body, wherein the shaft is disposed in the bushing, and
- a stator structure disposed corresponding to the rotor structure and comprising a first coil assembly and a second coil assembly overlapped on the first coil assembly, wherein the magnetic body is disposed corresponding to the stator structure;
- an impeller structure connected to the rotor structure of the three-phase motor;
- and
- an upper cover connected to the three-phase motor and covering the impeller structure,
- wherein the first coil assembly comprises a plurality of first coils and the second coil assembly comprises a plurality of second coils,
- wherein one of the first coils of the first coil assembly and one of the second coils of the second coil assembly having the same phase are disposed relative to each other with an included angle,
- wherein the included angle and the pole pair number of the magnetic body comply with the equation:
- θm=2×180°/P, wherein θm is the included angle, and P is the pole pair number of the magnetic body.
Dependencies are inferred from the claim text.