Abstract: A brushless DC motor fan is provided. The brushless DC motor fan includes a rotor and a stator module. The rotor has a shaft disposed on an inner side of the stator module and rotating relative to the stator module. The stator module has a coreless coil and a lead frame, wherein the lead frame includes six pins electrically connected to the coreless coil.

Abstract: An insulation seat of a slim reel-type brushless motor includes a ring-shaped bottom plate, an inner plate and an outer plate. The ring-shaped bottom plate has an opening. The inner plate is arranged around the opening. At least one upper locking element is protruded upwardly from the inner plate. At least one lower locking element is protruded downwardly from the inner plate. The upper locking element and the lower locking element are staggered. The outer plate is arranged around an outer periphery of the ring-shaped bottom plate. An accommodation space is defined by the ring-shaped bottom plate, the inner plate and the outer plate. A coil is disposed within the accommodation space. The at least one upper locking element of the inner plate is engaged with a first magnetic seat. The at least one lower locking element of the inner plate is engaged with a second magnetic seat.

Abstract: A micro fan is provided. The micro fan includes a rotor and a stator. The stator includes a plurality of axial induced coil units and a circuit board. The axial induced coil units are respectively preformed as a plurality of stator magnetic pole units, and are coupled to the circuit board. At least one of the coil units includes a coil and insulation material. The insulation material is block-shaped and covers at least a portion of the coil, and the central axis of the coil is parallel to the shaft of the rotor.

Abstract: A brushless DC motor fan is provided. The brushless DC motor fan includes a rotor and a stator module. The rotor has a shaft disposed on an inner side of the stator module and rotating relative to the stator module. The stator module has a coreless coil and a lead frame, wherein the lead frame includes six pins electrically connected to the coreless coil.

Abstract: An insulation seat of a slim reel-type brushless motor includes a ring-shaped bottom plate, an inner plate and an outer plate. The ring-shaped bottom plate has an opening. The inner plate is arranged around the opening. At least one upper locking element is protruded upwardly from the inner plate. At least one lower locking element is protruded downwardly from the inner plate. The upper locking element and the lower locking element are staggered. The outer plate is arranged around an outer periphery of the ring-shaped bottom plate. An accommodation space is defined by the ring-shaped bottom plate, the inner plate and the outer plate. A coil is disposed within the accommodation space. The at least one upper locking element of the inner plate is engaged with a first magnetic seat. The at least one lower locking element of the inner plate is engaged with a second magnetic seat.

Abstract: A micro fan is provided. The micro fan includes a rotor and a stator. The stator includes a plurality of axial induced coil units and a circuit board. The axial induced coil units are respectively preformed as a plurality of stator magnetic pole units, and are coupled to the circuit board. At least one of the coil units includes a coil and insulation material. The insulation material is block-shaped and covers at least a portion of the coil, and the central axis of the coil is parallel to the shaft of the rotor.

Abstract: A recirculation fan includes a casing, a covering member, a wind-guiding device, a passive impeller, and an active impeller. The covering member is coupled with the casing to define an accommodation space. The wind-guiding device is disposed on the covering member, and includes a wind-guiding cover and a magnetoresistive structure. The magnetoresistive structure is disposed on the covering member and the wind-guiding cover. The passive impeller is disposed within the accommodation space. The active impeller is disposed within the accommodation space and located beside the passive impeller for generating a wind to drive rotation of the passive impeller and the wind-guiding cover. In response to a magnetic torque resulted from a magnetic vortex of the magnetoresistive structure, a rotating speed of the wind-guiding cover is slowed down.

Abstract: A passive drive motor is disclosed. A stator assembly is connected to a base. A rotating shaft is rotatably connected to the base. A rotor assembly is connected to the rotating shaft. The rotor assembly interacts with the stator assembly to rotate the rotating shaft. A first metal disk is rotated by the rotating shaft. At least one first magnet pair is disposed on the first metal disk. A second metal disk opposes the first magnet pair. When the rotating shaft rotates to drive the first metal disk to rotate, the first magnet pair disposed on the first metal disk magnetically interacts with the second metal disk, driving the second metal disk to rotate with respect to the first metal disk.

Abstract: A motor includes a rotor, a sensor unit, an offset unit, a rectification unit and a modulating unit. The sensor unit outputs a first signal in accordance with a magnetic field variation of the rotor. The offset unit is coupled to the sensor unit, and outputs a second signal in accordance with the first signal. The rectification unit is coupled to the offset unit, and outputs a third signal in accordance with the second signal. The modulating unit is coupled to the rectification unit, and outputs a control signal in accordance with a result by comparing the third signal with a periodic signal. The modulating unit controls a reverse rotation of the rotor smoothly in accordance with the control signal. A control method of the motor is also disclosed.

Abstract: A motor includes a rotor, a sensor unit, an offset unit, a rectification unit and a modulating unit. The sensor unit outputs a first signal in accordance with a magnetic field variation of the rotor. The offset unit is coupled to the sensor unit, and outputs a second signal in accordance with the first signal. The rectification unit is coupled to the offset unit, and outputs a third signal in accordance with the second signal. The modulating unit is coupled to the rectification unit, and outputs a control signal in accordance with a result by comparing the third signal with a periodic signal. The modulating unit controls a reverse rotation of the rotor smoothly in accordance with the control signal. A control method of the motor is also disclosed.

Abstract: A fan includes an impeller and an inner rotor motor. The inner rotor motor connects to the impeller and drives it to rotate. The inner rotor motor includes a bushing, a shaft, a magnetic conducting shell, a magnetic element and a stator. The shaft passes through the bushing and is coupled to the impeller. The magnetic conducting shell is coupled to the shaft and telescoped to the bushing. The magnetic element is disposed around outside of the magnetic conducting shell. The stator is disposed around outside of the magnetic element.

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.

Abstract: A recirculation fan includes a casing, a covering member, a wind-guiding device, a passive impeller, and an active impeller. The covering member is coupled with the casing to define an accommodation space. The wind-guiding device is disposed on the covering member, and includes a wind-guiding cover and a magnetoresistive structure. The magnetoresistive structure is disposed on the covering member and the wind-guiding cover. The passive impeller is disposed within the accommodation space. The active impeller is disposed within the accommodation space and located beside the passive impeller for generating a wind to drive rotation of the passive impeller and the wind-guiding cover. In response to a magnetic torque resulted from a magnetic vortex of the magnetoresistive structure, a rotating speed of the wind-guiding cover is slowed down.

Abstract: A passive drive motor is disclosed. A stator assembly is connected to a base. A rotating shaft is rotatably connected to the base. A rotor assembly is connected to the rotating shaft. The rotor assembly interacts with the stator assembly to rotate the rotating shaft. A first metal disk is rotated by the rotating shaft. At least one first magnet pair is disposed on the first metal disk. A second metal disk opposes the first magnet pair. When the rotating shaft rotates to drive the first metal disk to rotate, the first magnet pair disposed on the first metal disk magnetically interacts with the second metal disk, driving the second metal disk to rotate with respect to the first metal disk.

Abstract: The present invention provides fan with an inrunner motor. The fan includes a fan frame, a rotor and a stator. The fan frame includes a base. The rotor includes a hub, a bushing and a magnetic member, wherein the magnetic member sleeves on the bushing. The stator is disposed on the base and coupled with the rotor, and the stator includes a shaft through the bushing, wherein an end of the shaft is fixed on the base.

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.

Abstract: The present invention provides fan with an inrunner motor. The fan includes a fan frame, a rotor and a stator. The fan frame includes a base. The rotor includes a hub, a bushing and a magnetic member, wherein the magnetic member sleeves on the bushing. The stator is disposed on the base and coupled with the rotor, and the stator includes a shaft through the bushing, wherein an end of the shaft is fixed on the base.

Abstract: A fan includes an impeller and an inner rotor motor. The inner rotor motor connects to the impeller and drives it to rotate. The inner rotor motor includes a bushing, a shaft, a magnetic conducting shell, a magnetic element and a stator. The shaft passes through the bushing and is coupled to the impeller. The magnetic conducting shell is coupled to the shaft and telescoped to the bushing. The magnetic element is disposed around outside of the magnetic conducting shell. The stator is disposed around outside of the magnetic element.

Abstract: A three-phase opposite rotating motor of a fan comprises a stator having a three-phase coil set without a core, a first rotor and a second rotor. The number of the poles of the first rotor is unequal to the number of the poles of the second rotor. The ratio of the number of solenoids of the three-phase coil set and the number of the first poles of the first rotor is 3:4, and the ratio of the number of solenoids of the three-phase coil set and the number of the second poles of the second rotor is 3:2, to ensure the motor works normally in an opposite rotating operation.

Abstract: A magnetic bearing system for a rotating machine is disclosed. The magnetic bearing system provides a non-contacting radial rigid support for the rotating machine by employing two magnetic assemblies each being formed by stacked annular magnets. The magnetic assemblies are mounted separately on a shaft of the rotating machine and a shaft hole provided on the stator seat of the rotating machine for containing the shaft.