Abstract: A motor includes a fixed portion, a rotor, a balancing plate, and at least one sensor mounted on the fixed portion. The fixed portion includes a stator having at least one winding and a plurality of pole faces. The rotor includes an annular magnet facing the pole faces of the stator and a shaft rotatably extending through the fixed portion. The balancing plate is mounted on the fixed portion and includes at least two magnetically conductive faces that face at least one face of the annular magnet. The balancing plate presses against and thus precisely positions a body of the sensor so that the sensor and the annular magnet have a certain distance therebetween while providing a magnetically attracting balancing effect between the at least two magnetically conductive faces and the annular magnet.

Abstract: A motor includes a fixed portion, a rotor, a balancing plate, and at least one sensor mounted on the fixed portion. The fixed portion includes a stator having at least one winding and a plurality of pole faces. The rotor includes an annular magnet facing the pole faces of the stator and a shaft rotatably extending through the fixed portion. The balancing plate is mounted on the fixed portion and includes at least two magnetically conductive faces that face at least one face of the annular magnet. The balancing plate presses against and thus precisely positions a body of the sensor so that the sensor and the annular magnet have a certain distance therebetween while providing a magnetically attracting balancing effect between the at least two magnetically conductive faces and the annular magnet.

Abstract: A motor includes a fixed portion, a rotor, and at least one balancing plate fixed on the fixed portion. The fixed portion includes a stator having at least one pole plate that extends to form a plurality of pole faces, with a gap being defined between a pair of the pole faces adjacent to each other. The rotor includes a shaft and an annular magnet facing the pole faces. The balancing plate includes at least two magnetically conductive faces respectively aligned with the gaps. Each magnetically conductive face includes a length not smaller than that of an associated gap. The pole faces face at least one face of the annular magnet. When the rotor turns, the annular magnet of the rotor induces the alternating magnetic fields created by the stator and attracts the magnetically conductive faces to thereby maintain rotational balance of the rotor.

Abstract: A motor includes a fixed portion, a rotor, a balancing plate, and at least one sensor mounted on the fixed portion. The fixed portion includes a stator having at least one winding and a plurality of pole faces. The rotor includes an annular magnet facing the pole faces of the stator and a shaft rotatably extending through the fixed portion. The balancing plate is mounted on the fixed portion and includes at least two magnetically conductive faces that face at least one face of the annular magnet. The balancing plate presses against and thus precisely positions a body of the sensor so that the sensor and the annular magnet have a certain distance therebetween while providing a magnetically attracting balancing effect between the at least two magnetically conductive faces and the annular magnet.

Abstract: A motor includes a fixed portion, a rotor, and at least one balancing plate fixed on the fixed portion. The fixed portion includes a stator having at least one pole plate that extends to form a plurality of pole faces, with a gap being defined between a pair of the pole faces adjacent to each other. The rotor includes a shaft and an annular magnet facing the pole faces. The balancing plate includes at least two magnetically conductive faces respectively aligned with the gaps. Each magnetically conductive face includes a length not smaller than that of an associated gap. The pole faces face at least one face of the annular magnet. When the rotor turns, the annular magnet of the rotor induces the alternating magnetic fields created by the stator and attracts the magnetically conductive faces to thereby maintain rotational balance of the rotor.