Abstract: A cooling fan module includes a fan and a PMDC motor. The PMDC motor includes a stator and a rotor. The stator has 2P magnetic poles. The rotor includes a rotary shaft, a rotary core, a commutator, and a winding. The rotor core includes m×P pole teeth. The commutator includes k×m×P commutator segments. Adjacent pole teeth define therebetween winding slots for receiving the winding. The winding includes winding units each having P coils. Each of two ends of each winding unit includes a lead-out line connected to the commutator segment. Any two lead-out lines extending out of different winding slots are spaced from each other at locations outside the commutator segments.

Abstract: A magnetic core for an electric motor has a ring-shaped yoke, teeth extending outwardly from the yoke, and a tooth tip extending from a distal end of each tooth. The core is formed from curved or coils strip laminations having teeth arranged in tooth groups. Each group has four tooth types arranged sequentially. Each tooth has left and right half tooth tips. The length of the half tooth tips vary according to tooth type. When assembled, first type tooth overlap with third type teeth and second type teeth overlap with fourth type teeth, whereby the opening of the winding slot is narrowed compared to laminations having all identical teeth.

Abstract: A rotor, which includes a rotor main body and a fan. The rotor main body includes a rotor core, a rotary shaft extending through the rotor core, and a permanent magnet mounted in the rotor core. The fan includes a plurality of fixing portions embedded in the rotor main body and configured to fix the permanent magnet. The rotor has a simple structure, can be easily assembled, and has a low cost.

Abstract: An actuator for a cooling fan module includes a controller, a first motor and a second motor. The controller includes a controlling unit configured to receive control commands, and a motor driving unit electrically connected to the controlling unit and powered by a DC power supply. The first motor is electrically connected to the motor driving unit. The second motor is connected in parallel to the first motor. The first motor and the second motor are synchronously driven and controlled by the controller.

Abstract: The invention relates to an electric switch for electric appliances. The electric switch include a switch housing, an actuating element, and a plug socket. The actuating element is configured to switch a contact system accommodated in the switch housing by movement between a switch-off position and a switch-on position. The plug socket is non-detachably connected to the switch housing. Electrical connections of the contact system are held in the plug socket such that ends of the electrical connections are in predetermined positions.

Abstract: A motor shaft includes a main body and a chamfered end formed at an end of the main body. The chamfered end has a chamfer formed at a peripheral surface thereof, and a groove defined in an end surface thereof. An axial length of the chamfer is greater than a depth of the groove in the axial direction of the motor shaft. An electric motor including the motor shaft is also provided.

Abstract: An electrical connector for connecting a motor and a cable connector, includes an electrically insulating main body and a plurality of electrical terminals. The main body includes a front side and a rear side configured to be engaged with a corresponding cable connector. The front side of the main body includes a mounting portion, which is configured to be stably mounted on the seat, so that the electrical terminals can be placed in a stable connection with corresponding motor terminals.

Abstract: A fan device includes a driving device, a fan wheel, and a locking fastener. The driving device includes a shaft. The fan wheel defines a shaft hole to receive the shaft. The locking fastener has a thermal expansion coefficient same as a thermal expansion coefficient of the shaft.

Abstract: An electrical connector for an electric motor, includes an insulating main body with a front side configured to be coupled with the motor and a rear side configured to be coupled with a corresponding wiring harness, a plurality of electrical terminals fixed by the main body, and at least one current protection element. The at least one current protection element is positioned in the main body.

Abstract: A actuator and a pump using the actuator are provided. The actuator is used to drive a pump body. The actuator includes a base, a transmission assembly and a motor received in the base. The motor includes a stator, a rotor, and a driving shaft. The driving shaft is connected to the transmission assembly. The base includes a mounting bracket. The mounting bracket is partly embedded in the motor. The actuator has good integrality and a compact structure.

Abstract: An electric power steering system and its brush motor are disclosed. The brush motor includes a stator and a rotor rotatably mounted to the stator. The rotor includes a rotary shaft, a commutator and a rotor core fixed to the rotary shaft, and a rotor winding wound around the rotor core. The commutator includes a plurality of commutator segments. The rotor core includes a plurality of teeth. The rotor winding includes a plurality of winding elements. Adjacent teeth define therebetween wire slots for receiving the winding elements. The winding elements include a plurality of first winding elements and a plurality of second winding elements. The first winding elements are connected in series through the commutator segments. The second winding elements are connected in series through the commutator segments. The first winding elements and the second winding elements are received in different wire slots. Implementation of the present invention can improve the reliability of the product.

Abstract: A closure system for a seat of an electric motor adapted for housing a rotor of the electric motor, which is allowed to provide a perfect and resistant sealing of the seat, without the need to apply a resin near the lid. when the lid is at least partially inserted into the seat of the rotor, an annular gasket is disposed in contact between the lid and the seat, one end of the main body of a retaining element, which faces the opening, elastically presses against the central portion of the lid, and an opposite radially protruding end of the tabs of the retaining element, elastically presses against the seat, to prevent the removal of the lid from the seat.

Abstract: The present invention relates to a ring gear and a gear reduction device. The ring gear includes an annular body with a plurality of mounting portions, and a plurality of teeth arranged on an inner circumferential surface of the annular body. The annular body and the teeth are integrally formed from powder metal, and the mounting portions and the teeth are at least partly overlapped in an axial direction of the annular body. The mounting portions are integrally formed with the annular body and the teeth, which results in concentricity between the mounting portion and the teeth being improved and cost of the ring gear being reduced. Furthermore, the mounting portions are overlapped with the teeth, which reduces the axial size of the ring gear.

Abstract: A motor, a rotor and a sleeve are provided. The motor includes a stator and a rotor which includes a shaft, a rotor core, a sleeve, a commutator, and a rotor winding wound on the rotor core. The sleeve is arranged between the rotor core and the commutator. The sleeve includes a first end portion close to the commutator, a second end portion close to the rotor core, and a middle portion therebetween. An outer diameter of the first end portion is smaller than an outer diameter of the middle portion, and the outer diameter of the middle portion is smaller than an outer diameter of the second end portion. An end of the commutator close to the sleeve has a groove, and the first end portion of the sleeve is placed in the groove. The rotor has a good seismic performance.

Abstract: A muffling device applied to a ventilating fan having a scroll casing that has a bottom plate and a top plate includes a first annular muffling panel and a second annular muffling panel. The first muffling panel includes a first wall extending from an edge of the through hole in a direction away from the bottom plate and a second wall extending inward from a top end of the first wall and extending toward the bottom plate. The second muffling panel includes a third wall extending from the top plate in a direction away from the bottom plate and a fourth wall extending from a top end of the third wall. The first muffling panel, the second muffling panel, and the top plate corporately define a first noise reduction chamber. A distance from the second muffling panel to the first muffling panel is gradually increased in a radially outward direction.

Abstract: An actuator includes a controller, a motor and a sensor device. The controller includes a housing, and the motor includes a rotor, and the rotor includes a rotating shaft. The motor is mounted on the outside of the housing, and the sensor device includes a magnet and a sensor, the magnet is mounted on the rotating shaft of the motor, and the sensor is mounted inside the housing. The actuator has a good waterproof performance and anti-interference ability. This disclosure also relates to an electronic clutch system having the actuator.

Abstract: A brush assembly includes a brush holder, a brush, an elastic element, and a conductive terminal. The brush slidably is accommodated in the brush holder. The elastic element is resisted between the brush and the brush holder. And the conductive terminal is formed by bending from the brush holder.

Abstract: The present teaching relates to a magnetic sensor residing in a housing. The magnetic sensor includes an input port and an output port, both extending from the housing, wherein the input port is to be connected to an external alternating current (AC) power supply. The magnetic sensor also includes an electric circuit which comprises an output control circuit coupled with the output port and configured to be at least responsive to a magnetic induction signal and the external AC power supply to control the magnetic sensor to operate in a state in which a load current flows through the output port. The magnetic induction signal is indicative of at least one characteristic of an external magnetic field detected by the electrical circuit and the operating frequency of the magnetic sensor is positively proportional to the frequency of the external AC power supply.

Abstract: A cooling fan module for a heat exchanger or the like, has a motor, a fan driven by the motor and a speed controller connected between the motor and a power supply. The speed controller is configured to operate the motor in a high speed mode and a low speed mode. The speed controller includes a high speed branch and a low speed branch connected in parallel. The low speed branch includes a pulse width modulation circuit configured to reduce an average voltage by a fixed duty ratio to achieve a low speed operation of the motor. By eliminating the conventional voltage dropping resistor, the speed controller reduces the power consumption, thus increasing the efficiency of the module, in the low speed mode of operation.

Abstract: An electronic parking lock actuator includes a driving motor configured to generate a driving force, an output mechanism including an emergency unlocking feature, a reduction transmission mechanism connected between the driving motor and the output mechanism to transfer a driving force generated by the driving motor to output mechanism, a control device electrically connected to the power mechanism for controlling the power mechanism, and a casing receiving all of the driving motor, the output mechanism, the reduction transmission, the controller therein. The casing defines an opening configured to expose the emergency unlocking feature.