Abstract: A stator for a DC brushless motor includes an annular insulating ring integrally formed from an insulating material. The annular insulating ring includes an outer peripheral face and an inner peripheral face. A plurality of winding portions extends from at least one of the outer and inner peripheral faces. A coil unit is wound around each of the plurality of winding portions. The stator can be utilized in various DC brushless motors. Since the stator does not include conventional silicon steel plates and is comprised of an annular insulating ring and a coil unit, advantages including low manufacturing costs, assembling convenience, possible reduction in the axial height, and high rotational stability are obtained.

Abstract: An inner-rotor-type motor includes a housing, a stator, a rotor, a permanent magnet and a cover plate. The housing has a compartment. The stator is received in the compartment. There is an assembling hole arranged at the axial center of the stator and passing through the stator from the top to the bottom thereof. The rotor has a shaft with one end thereof rotatably extending through the assembling hole, with a bearing being mounted around the shaft. The permanent magnet is fixed to an outer periphery of the shaft and beside the bearing, with the permanent magnet facing the stator. The cover plate is arranged between the permanent magnet and the bearing. Consequently, impurities are prevented from entering an undesired interstice between the bearing and the shaft or from entering the inside of the bearing, such that smooth rotation of the rotor is provided and such that life of the inner-rotor-type motor is extended.

Abstract: An inner-rotor-type motor comprises a casing, a shaft and a claw-pole member. The shaft is rotatably coupled to the casing, and coupled to a permanent magnet having a magnetism-inducing surface. The claw-pole member is coupled within the casing and has an annual portion and a plurality of salient-poles. The annual portion has an inner circumferential wall. Each salient-pole is disposed between the annual portion and a respective pole plate. Each pole plate has a first side and a second side. The first side and the second side are opposing to each other. A magnetic pole surface is formed between the first side and the second side and faces the magnetism-inducing surface of the permanent magnet. An air gap is formed between the magnetic pole surface and the magnetism-inducing surface. Each pole plate has an extension portion and a shrinking portion. The coil unit is coupled to the plurality of salient-poles.

Abstract: An inner-rotor-type heat dissipating fan includes a fan housing, a seal casing, an inner-rotor-type motor, an impeller and a circuit board. The fan housing includes an outer frame portion and a motor casing. The seal casing is a hollow housing made of magnetically conductive material. One end of the seal casing forms a connecting portion coupling to the motor casing. The inner-rotor-type motor is mounted inside the seal casing. The impeller is coupled to the inner-rotor-type motor and outside the seal casing. The circuit board is electrically connected to the stator. By this configuration, rotation stability of the impeller is enhanced by the inner-rotor-type motor, airflow generated by rotation of the impeller is effectively concentrated and guided by the fan housing, and a sealing effect for avoiding magnetic flux leakage is provided by the seal casing. Consequently, heat dissipating efficiency is enhanced.

Abstract: A heat dissipating device includes a casing having a compartment. At least one heat conducting board is mounted in the compartment and divides the compartment into first and second chambers. The first chamber includes a plurality of openings. At least one fan unit is mounted in the first chamber and includes at least one air inlet and at least one air outlet. The air inlet is in communication with a first one of the plurality of openings. The air outlet is in communication with a second one of the plurality of openings. By utilizing the heat conducting board to absorb the heat generated by electronic elements in the second chamber and by creating airflow in the first chamber with the fan unit, the temperature of the second chamber and the electronic elements is lowered while preventing moisture or dust from entering the first chamber.

Abstract: A heat dissipating fan includes a housing having an air inlet and air outlet between which an air passageway is formed. A fixed seat is provided in the air passageway and includes first positioning holes. A magnetically conductive first casing includes a first outer wall, an extended wall extending radially outward from an end of the first outer wall and having second positioning holes aligned with the first positioning holes, and a first support on the other end of the first outer wall. A second casing is coupled to an inner peripheral of the extended wall of the first casing. A motor mounted in the first and second casings includes a stator and a circuit board electrically connected to the stator.

Abstract: A heat dissipating fan includes a housing having an air inlet and air outlet between which an air passageway is formed. A fixed seat is provided in the air passageway and includes first positioning holes. A magnetically conductive first casing includes a first outer wall, a first annular lip extending radially outward from an end of the first outer wall and having second positioning holes aligned with the first positioning holes, and a first support on the other end of the first outer wall. A second casing includes a second outer wall, a second annular lip extending radially outward from an end of the second outer wall and having third positioning holes aligned with the first positioning holes, and a second support on the other end of the second outer wall. Fasteners extend through the first, second and third positioning holes. A motor is mounted in the first and second casings.

Abstract: A rotor structure for a motor includes a shaft, a single magnet, and two fixing seats. The shaft passes through the single magnet and the two fixing seats, with the two fixing seats being adjacent to and abutting against two end faces of the single magnet, respectively. The single magnet fits with a small clearance or loosely fits the shaft, and the two fixing seats tightly fit the shaft, such that the single magnet is positioned at a predetermined position relative to the shaft without rupture. Furthermore, each of the two end faces and two abutting faces are formed with rough surfaces and/or with corresponding grooves and protrusions, so as to achieve a stable-engaging effect between the single magnet and fixing seats.

Abstract: A coil unit for a motor stator includes a plurality of layout layers. At least one coil and a conductive portion electrically connected to the at least one coil are formed on a surface of each layout layer. The conductive portions of two adjacent layout layers are electrically connected to each other. An insulting layer is provided between two adjacent layout layers. The coil unit can be coupled to a face of a substrate to form a motor stator with reduced axial height and reduced volume.

Abstract: The present invention relates to a fixing structure for printed circuit board (PCB) of micro motor, including a base and a PCB. The base has a shaft tube disposed centrally therein; at least a circuit board fixing pin is protruded beyond the base peripheral to the shaft tube; the PCB has a center hole for the shaft tube to be inserted in, and the diameter of the center hole shall be close to but not less than the outer diameter of the shaft tube; each circuit board fixing pin corresponds to a through hole disposed on the center of the PCB. Sensing plates are prevented from dropping to secure the motor to stably rotate; the circuit board fixing pin, after passing through the through hole, is fixed by an adhesive or a soldering means to make the PCB and the base perfectly fit and free from warp and vibration.

Abstract: A brushless DC motor includes a base, a stator, a rotor, and a leak flux absorber. The base couples with the rotor. The stator has a coil module and is mounted on the base. The rotor has a shaft and a permanent magnet, with the rotor coupling with the base through the shaft. A gap is axially formed between the permanent magnet and the coil module. Also, the leak flux absorber is disposed around the coil module and is adjacent to, partially in, or totally in the gap. Consequently, a leak flux generated by the permanent magnet, which does not pass through the coil module, is absorbed by the leak flux absorber and forms close magnetic flux paths, so that high-frequency noise in operation is thus lowered.

Abstract: A stator for a DC brushless motor includes an annular insulating ring integrally formed from an insulating material. The annular insulating ring includes an outer peripheral face and an inner peripheral face. A plurality of winding portions extends from at least one of the outer and inner peripheral faces. A coil unit is wound around each of the plurality of winding portions. The stator can be utilized in various DC brushless motors. Since the stator does not include conventional silicon steel plates and is comprised of an annular insulating ring and a coil unit, advantages including low manufacturing costs, assembling convenience, possible reduction in the axial height, and high rotational stability are obtained.

Abstract: A stator for a radial gap motor is formed by winding a plurality of metal wires to form a hollow cylinder having a plurality of poles and a plurality of turns. Two ends of each metal wire are located on the same end of the cylinder and form a plurality of conductive members for electric connection with a circuit board. The stator is simple in structure and easy to manufacture. The stator can be utilized in various radial gap motors, so that the radial gap motors benefit from the advantages of the stator.

Abstract: A miniature motor includes a base having a layout layer with two faces spaced along an axis. The layout layer includes a coil unit. The base further includes an outer layer provided on one of the faces of the layout layer. A shaft seat is provided on the base. A rotor includes a shaft and a permanent magnet. The shaft is coupled to the shaft seat and rotatable about the axis. The permanent magnet is aligned with the coil unit. An air gap is formed between the permanent magnet and the outer layer of the base. The coil unit is integrated into the base such that the coil unit is outside of the air gap. The axial height of the miniature motor is reduced, and the structure of the miniature motor is simplified.

Abstract: A miniature fan includes a housing having a mounting portion with a shaft seat. A base is mounted to the mounting portion of the housing. The base includes first and second faces spaced along an axis. An outer layer is provided on the first face of the base. A bottom layer is provided on the second face of the base. The base further includes a coil unit intermediate the outer layer and the bottom layer. The coil unit is electrically connected to a drive circuit. An impeller includes a shaft and a permanent magnet. The shaft is coupled to the shaft seat of the housing and rotatable about the axis. The permanent magnet is aligned with the coil unit. The axial height of the miniature fan is reduced, and the structure of the miniature fan is simplified.

Abstract: A motor with detachable winding assemblies includes a motor base, a shaft tube, a driving circuit board, a shaft, a plurality of winding assemblies and a rotor. Each winding assembly includes a base, a winding, a packaging body and two electrical connection members. The base includes a supporting face. The winding includes two ends and a plane, wherein the plane is in intimate contact with the support face of the base. The packaging body encloses the base and the winding. The two electrical connection members are respectively connected with the driving circuit board and the two ends of the winding, wherein each of the electrical connection members is partially exposed outside the packaging body. The rotor is rotatably coupled to the shaft.

Abstract: A stator manufacturing method for a motor comprises a preliminary step configured to provide a strip plate having at least one wound portion on a surface thereof; a winding step configured to provide a coil unit and wind the coil unit around the at least one wound portion of the strip plate; a rolling step configured to roll up the strip plate into an unshaped sleeve having a central hole, wherein the at least one wound portion and the coil unit are located inside the central hole; and a shaping step configured to shape the unshaped sleeve into a shaped sleeve.

Abstract: A stator for a brushless DC motor includes a cylindrical member and a positioning member. The cylindrical member is formed by a plurality of metal wires. Each metal wire includes two ends each forming a terminal. The cylindrical member includes first and second ends separated along a longitudinal axis. The positioning member includes an annular body received in the first end of the cylindrical member and separated from the second end of the cylindrical member along the longitudinal axis. The positioning member maintains a shape of the cylindrical member. The stator can be mounted in a space defined by a housing and a base engaged with the housing, forming a brushless DC motor. A bearing and a circuit board are mounted in the space. The bearing rotatably supports a shaft. A permanent magnet is mounted to the shaft and aligned with the stator.

Abstract: A stator core includes a magnetically conductive member coated with an insulating layer. The magnetically conductive member is integrally formed as a single continuous monolithic piece. The magnetically conductive member includes a ring, a plurality of pole teeth, and a plurality of magnetic pole portions. The ring has an inner periphery defining a compartment. Each pole tooth includes a first end contiguous to the inner periphery of the ring and a second end extending in the compartment. Each magnetic pole portion is contiguous to the second end of one of the pole teeth. The stator core can be utilized to form a stator for an inner rotor motor. Each pole tooth can include arcuate guide portions to allow easy winding of coils.

Abstract: A heat-dissipating fan includes a housing, a stator, a rotor and at least one retaining member. The stator and rotor are received inside the housing. The rotor includes an impeller having a plurality of blades. The at least one retaining member is removably mounted to the housing and includes a retaining plate. In an axial direction of the rotor, the retaining plate extends to be above and within a rotational area of the blades to retain the rotor to avoid departure of the rotor from the housing, even if the heat-dissipating fan is hit hard while it is packed, moved, transported or operating. Besides, the arrangement of the retaining member won't result in reduction of air input. Consequently, the retaining member can be quickly mounted to the housing at a predetermined position to enhance convenience of assembly.