Motors and control methods thereof
AssigneeDelta Electronics, Inc.
InventorsMagellan Chiu, Venson Kuo, Wen-Shi Huang, Ming-Shi Tsai
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Abstract
Motors comprising stators and rotors having a plurality of north poles and south poles and methods of controlling the same. A first sensor and a second sensor are provided. The first and second sensors are disposed on the stator in a manner that the first and second sensors never simultaneously detect boundaries between the north and south poles during rotation of the rotor. If any one of the first and second sensors continuously detects a north pole or a south pole for a predetermined duration, the motor is shut off.
Claims16
A control method for preventing shake of a motor, the motor comprising a stator and a rotor, the rotor having a plurality of north poles and south poles, the control method comprising the steps of:
- providing a first sensor and a second sensor on the stator in a manner that the first and second sensors are disposed in such a manner that the first and second sensors never simultaneously detect boundaries between the north and south poles during rotation of the rotor, wherein only the first and second sensors are disposed on the stator;
- outputting first signal when the first sensor detects any one of the north poles during the rotation of the rotor and a second signal when the first sensor detects any one of the south poles;
- outputting a third signal when the second sensor detects any one of the north poles during rotation of the rotor, and a fourth signal when the second sensor detects any one of the south poles;
- and
- shutting off the motor when the first signal and the second signal are alternately output by the first sensor, and the third signal or the fourth signal is continuously sent out longer than a predetermined duration.
A motor comprising
- a rotor having a plurality of north poles and south poles;
- a stator;
- a first sensor disposed on the stator;
- a second sensor disposed on the stator in such a manner that the first and second sensors never simultaneously detect boundaries between the north and south poles during rotation of the rotor;
- and
- a processor receiving signals from the first and second sensors and generating an enable signal according to the received signal so that the motor is shut off when a first signal and a second signal are alternately output by the first sensor, and a third signal or a fourth signal is continuously sent out by the second sensor and longer than a predetermined duration.
A motor comprising:
- a rotor having a plurality of north poles and south poles;
- a stator;
- a first sensor disposed on the stator and outputting a first signal when the first sensor detects any one of the north poles during the rotation of the rotor and a second signal when the first sensor detects any one of the south poles;
- and
- a second sensor disposed on the stator in such a manner that the first and second sensors never simultaneously detect boundaries between the north and south poles during rotation of the rotor and outputting a third signal when the second sensor detects any one of the north poles during rotation of the rotor, and a fourth signal when the second sensor detects any one of the south poles, wherein the motor is shut off when the first signal and the second signal are alternately output by the first sensor, and the third signal or the fourth signal is continuously sent out longer than a predetermined duration.
Dependencies are inferred from the claim text.