Abstract: A fan includes a frame, a motor base, an impeller, an airflow guiding component, and at least one outwardly expanded part. The motor base is disposed in the frame, and the impeller is disposed on the motor base. The outwardly expanded part, connected with the frame, is disposed at an airflow inlet or an airflow outlet, for increasing areas of intake airflow or discharge airflow. One end of the airflow guiding component is connected with the motor base, and the other end is connected with an inner surface of the frame, instead of being connected with the outwardly expanded part, to prevent the fan from forming blocks on the frame during molding process.

Abstract: A main body of a motor stator. The main body includes a cylindrical waist post, a plurality of first salients and a plurality of second salients. The waist post has a first end and a second end. The first salients, spaced at intervals, are connected to the first end and located on a first plane. The second salients, spaced at intervals, are connected to the second end and located on a second plane. When the first salients project onto the second plane along the axial direction of the cylindrical waist post, each projected first salient is located between two adjacent second salients.

Abstract: A motor includes a stator, a rotor, a top magnetic structure, and a bottom magnetic structure. The stator is disposed in a frame. The rotor is also disposed in the frame, corresponding to the stator. The rotor includes a shaft extending axially from the rotor. The bottom magnetic structure is at the bottom of the frame. The top magnetic structure is on the top of the frame. The top and bottom magnetic structures are opposite to each other in an axial direction. Magnetic attraction generated between the first magnetic structure and the shaft, and the second magnetic structure and the shaft positions the shaft therebetween such that the first magnetic structure, the second magnetic structure, and the shaft are coaxially aligned.

Abstract: A fan is disclosed for use in a system, and the system has at least one connection structure. The fan is mainly composed of an impeller and a base, and the impeller is connected to the base. The impeller at least has a hub, a plurality of blades and a driver. The base has at least one engaging member, and the engaging member is corresponding to the connection structure. Further, the fan is fixed on the system by connecting the engaging member and the connection structure together.

Abstract: A fan includes a fan frame and an impeller. The fan frame has a housing, a base and at least one supporting element. The inner wall of the housing has at least one guiding portion in the form of a curved cavity for increasing an airflow intake of the fan, and the base is disposed within the housing and has a bottom portion and a pressurizing portion. The pressurizing portion is disposed around the bottom portion for increasing an air pressure of the fan. The supporting elements are connected to the housing and the pressurized portion of the base. The impeller is disposed within the housing and supported by the base.

Abstract: A heat dissipation module is disclosed. A first heat dissipation apparatus and a second heat dissipation apparatus are symmetrically disposed. A flow direction controlling structure has a rotatable element disposed between the first and second heat dissipation apparatuses and formed an isolation wall thereof, so that the first and second heat dissipation apparatuses respectively have a tunnel. Each of the rotatable elements has a fixed end and a correspondingly movable end for guiding air flow. When outlet pressures of the first and second heat dissipation apparatuses are different, the movable end deflects to the first heat dissipation apparatus or the second heat dissipation apparatus to change outlet areas thereof. The heat dissipation module and the flow direction controlling structure control air flow and prevent backflow, so as to maintain overall outlet area and improve heat dissipation effect of the module.

Abstract: A heat dissipation apparatus. A fan frame includes an air inlet, an air outlet, a passage, and a curved expansion portion. The air inlet is opposite the air outlet. The passage is between the air inlet and the air outlet, guiding airflow from the air inlet to the air outlet. The curved expansion portion is radially and outwardly extended from an inner peripheral wall of the passage at the air inlet or air outlet. An impeller is disposed in the fan frame and includes a plurality of blades. Each blade is disposed in the passage and includes an extension end extending to the curved expansion portion.

Abstract: A motor. The motor includes a stator, a rotor, a top magnetic structure, and a bottom magnetic structure. The stator is disposed in a frame. The rotor is also disposed in the frame, corresponding to the stator. The rotor comprises a shaft, extended axially from the rotor. The shaft does not contact the stator or the frame. The bottom magnetic structure is at the bottom of the frame. The top magnetic structure is on the top of the frame. The top and bottom magnetic structures are opposite to each other in an axial direction. Magnetic attraction generated between the first magnetic structure and the second magnetic structure attracts and positions the shaft therebetween such that the first magnetic structure, the second magnetic structure, and the shaft are coaxially aligned.

Abstract: A heat-dissipating device and its manufacturing process are provided for significantly increasing the number and size of blades so as to enhance the heat-dissipating performance. The heat-dissipating device has a plurality of blades arranged around the hub of the heat-dissipating device and there is an overlapped region formed between every two adjacent blades. A single mold is used to manufacture such a heat-dissipating device so that not only can the manufacturing cost be reduced but it can significantly increase the number and size of blades so as to increase the heat-dissipating efficiency.

Abstract: A centrifugal fan includes a hub and an impeller. The impeller is composed of a plurality of blades mounted around an outer circumference of the hub. The paraxial side of the blade forms a backward leaning structure, while the non-paraxial side thereof forms a forward leaning structure. A chamfer structure also can be formed at a paraxial side of each blade to enlarge the air inlet of the fan. Each blade further includes a protrusion, which is located at a side opposite to the inlet and extends toward a center of the hub, to increase the airflow rate through the fan motor. The centrifugal fan further includes an anti-decompression cap connected to an inlet side of the impeller to prevent an axial flow of the intake air from decompression.

Abstract: A permanent magnet motor is provided. The permanent magnet motor includes a stator having a stator shaft having an outer surface, K salient teeth formed upon the outer surface, and K winding slots formed among the K salient teeth, and a rotor having a first inner surface facing the outer surface, and P pairs of permanent magnets formed on the first inner surface, each of which has a second inner surface facing the outer surface and at least a groove formed on the second inner surface to reduce a cogging torque.

Abstract: A motor includes a first housing, a second housing, a rotor and a stator. The second housing is assembled with the first housing to form an accommodating space. The second housing has a flange adjacent to the connection between the first and second housings. The rotor has a shaft extended outwardly from the second housing and disposed in the accommodating space. The stator is disposed corresponding to the rotor and in the accommodating space. The flange has at least one protruding portion. When the second housing is assembled with the first housing, the protruding portion presses against the stator and is deformed so that the first and second housings are sealed.

Abstract: A rotary structure of a permanent magnet electric machine including a stator and a rotor is provided. The stator has K salient teeth peripherally spaced with equal intervals for forming K winding slots, wherein K is a natural number greater than 1. The rotor has an annular inner surface and has P pairs of permanent magnets peripherally spaced with equal intervals along the inner surface for rotating around the stator, wherein P is a natural number. Each permanent magnet having two sides along a peripheral direction of the rotor includes a pair of inclined surfaces on the two sides, the pair of inclined surfaces is symmetric with respect to a radial plane of the each permanent magnet, and an inclined angle ? between the inclined surface and the radial plane is selected from a range of 90(1?1/(4P))<?<90(1+1/(4P)).

Abstract: A fan assembly and impeller thereof. The fan assembly includes a plurality of blades and a hub. The hub includes an upper surface and a center point. The blades have bottom portions arranged in a circle on the upper surface with respect to the center point.

Abstract: Embodiments in accordance with the present invention relate to structures and methods allowing stress-induced electromigration to be tested in multiple interconnect metallization layers. An embodiment of a testing structure in accordance with the present invention comprises at least two segments of a different metal layer through via structures. Each segment includes nodes configured to receive force and sense voltages. Selective application of force and sense voltages to these nodes allows rapid and precise detection of stress-induced immigration in each of the metal layers.

Abstract: A test structure in accordance with the present invention allows for testing of both Vbd TDDB, and leakage current between adjacent gate features. The test structure comprises a plurality of parallel polysilicon gate structures overlying a substrate. Traces placing alternate gates in electrical communication with a polysilicon edge are connected by a fuse. In one embodiment, a potential difference is applied across all gates to trigger Vbd, and then the fuse is broken to allow individual probing of breakdown of the alternate groups of gates. In another embodiment, the fuse is broken and then force and sense voltages are applied to the edge polysilicon in communication with the alternate gate groupings, allowing detection of leakage current between the alternate groupings of gates that reveals the existence of an unwanted polysilicon extrusion or bridge.

Abstract: A fan assembly. The fan assembly is applicable to a light source that produces heat. The fan assembly comprises a frame and an impeller. The frame comprises an opening, and a periphery of the opening has a curved surface. The impeller is disposed in the frame. When light emitted from the light source enters the opening, the light is blocked from penetrating the opening by the curved surface.

Abstract: A moisture-proof device is provided to be used in a fan having a stator for isolating the stator from moisture. The moisture-proof device includes a first covering part for covering a circuit board of the stator of the motor, and a second covering part connected to the first covering part for covering a coil and a core of the stator of the motor, thereby isolating the stator of the motor from moisture, wherein the first covering part and the second covering part are integrally formed as a single piece, wherein the moisture-proof device is disposed in a hub of the fan.

Abstract: A driving control device of a motor includes a temperature sensing circuit, a comparing circuit, a rotation speed control circuit and a driving circuit. The temperature sensing circuit detects an environmental temperature for generating a sensing signal. The comparing circuit is electrically connected to the temperature sensing circuit, and compares the sensing signal with a reference voltage signal for outputting a comparing signal. The rotation speed control circuit is electrically connected to the comparing circuit and has a first threshold voltage and a second threshold voltage, both of which are compared with the comparing signal for outputting a rotation speed control signal. The driving circuit is electrically connected to the rotation speed control circuit, and generates a driving signal to drive the motor in accordance with the rotation speed control signal.

Abstract: A heat dissipation module is disclosed. The heat dissipation module includes fan and at least a heat sink. The fan includes a frame and an impeller. The frame includes a body and at least an extension. The extension protrudes from at least a side of the body. The extension or the body is connected with the circuit board. The impeller is disposed in the body. The heat sink is connected with the extension for dissipating heat produced from the electronic element.