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 driving device and a seat adjusting mechanism for vehicle are provided. The driving device includes a motor and a gearbox. The gearbox includes a worm and a worm gear. The worm is fixedly connected to an output shaft of the motor. The gearbox further includes first and second driving gears, and first and second driven gears. The first and second driving gears are coaxially fixed to the worm gear and located at two sides of the worm gear, respectively. The first and second driven gears are fixed coaxially with each other and engaged with the first and second driving gears, respectively. Two driving gears are arranged at the two sides of the worm gear symmetrically, and two driven gears are also arranged at the two sides of the worm gear symmetrically, which results in a compact structure and reduced volume of the driving device.

Abstract: A microwave filter includes a strip transmission line and a filtering assembly connected to the strip transmission line. The transmission line has an input terminal and an output terminal. The filtering assembly includes a strip first primary branch connected directly to a first connection point of the transmission line. The first primary branch includes a first body portion and a first bent portion at a first end of the first body portion, where the first bent portion is connected directly to the first connection point, and the first body portion is substantially parallel to a body portion of the transmission line. With the microwave filter incorporated in an electric motor, the impedance curve of the transmission line can be matched with a high-frequency EMI curve, and therefore the filtering effect is enhanced, EMI is suppressed and the EMC level improved.

Abstract: An electric motor includes a stator and a rotor rotatably mounted to the stator. The stator includes a housing having an open end, a plurality of adhesive strips applied on an inner surface of the housing, a plurality of magnets bonded to the inner surface of the housing by the adhesive strips, and an end cap assembly mounted to the opening end of the housing. The adhesive covers at least 70% of the area of the outer surface of each magnet after the magnets are assembled to the housing.

Abstract: The present teaching relates to a method/apparatus for a magnetic sensor. The apparatus of the magnetic sensor resides in a housing and includes an input port and an output port, both extending from the housing. The apparatus also includes an electrical circuit which comprises a magnetic field detecting circuit, configured to detect an external magnetic field and output a magnetic induction signal that is indicative of information related to the external magnetic field, an output control circuit coupled between the magnetic field detecting circuit and the output port, and a state control circuit coupled with the output control circuit and configured to determine whether a predetermined condition is satisfied and signal the same to the output control circuit.

Abstract: A cable connector is provided which includes an insulating body including a frame which defines a region therein; a plurality of electrical terminals fixed to the insulating body and extended into the region; and a plurality of cables electrically connected to the electrical terminals respectively in the region. The region is filled with an insulator to embed the electrical terminals and the cables. The cable connector has a relatively high reliability.

Abstract: The present teaching relates to a magnetic sensor that comprises a housing, an input port and an output port, both extending from the housing and the input port being connected to an external alternating current (AC) power supply, and an electrical circuit. The electrical circuit comprises an output control circuit coupled with the output port and configured to be responsive to a magnetic induction signal to control the magnetic sensor to operate in a state in which a load current flows through the output port when a predetermined condition is satisfied, and operate in another state when the predetermined condition is not satisfied. The operating frequency of the magnetic sensor is positively proportional to the frequency of the external AC power supply.

Abstract: A commutator is formed by providing an electrically insulating commutator body. First and second areas are defined on the commutator body covering a brush contact surface in an alternating manner. At least the surfaces of the first areas are formed of laser direct structured material. The first areas are treated by a laser to form metal particle layers. Conductive layers are formed on the metal particle layers by a plating process to form commutator segments. Terminals are connected to the conductive layers for connecting the commutator to rotor windings.

Abstract: A commutator has a conductive layer, a segment layer and an insulating layer separating the conductive layer and the segment layer. The segment layer includes multiple commutator segments. A mounting hole is defined along an axis of the commutator passing through the conductive layer. The three-layer structure of the commutator forms a capacitor having an increased confronting area and reduced inter-plate distance. The capacitor thus has a greater capacitance and hence greater EMI absorbing capability, making it possible to reduce EMI emissions without additional EMI reduction components outside the commutator. A rotor and a motor employing the commutator are also disclosed.

Abstract: An actuator includes a motor driving a worm, a gearbox, and a motor control module. The gearbox includes a gearbox housing, a worm wheel for meshing with the worm, an output mechanism fixed to the worm wheel. The gearbox housing defines worm chamber and worm wheel chamber. The motor control module includes a control module housing, a printed circuit board and a connector of the printed circuit board. The control module housing defines a control module chamber and the connector is mounted at an open end of the control module chamber. The control module housing is connected with the gearbox housing. The control module chamber and the worm wheel chamber are located on opposite sides of the worm chamber. An isolation slot is defined between the control module chamber and the worm chamber.

Abstract: An end cap assembly for an electric motor has an end cap body and at least two motor terminals. The end cap body has at least two holding structures for respectively holding the at least two motor terminals, each holding structure having at least one holder and a through slot. Each motor terminal has a base portion, a terminal portion and at least one mounting portion. The at least one mounting portion is mounted to the at least one holder of a corresponding holding structure. The terminal portion is inserted in the through slot to electrically connect to a male terminal of an external power supply plug. The terminal portion and the at least one mounting portion integrally extend from the base portion.

Abstract: A brush for an electric motor has a brush body having a front end surface configured to make sliding electrical contact with a commutator of the motor. First and second side surfaces are connected to the front end surface. The first side surface and the second side surface are positioned on opposite sides of the brush body in a rotational direction of the commutator. The front end surface has a first contact surface and a second contact surface that contact the commutator earlier than other regions of the front end surface, and are respectively positioned on diametrically opposed corners of the front end surface. In an initial state, the width of the contact area between the brush and the commutator is increased to extend the commutation time.

Abstract: A fan for a ventilation system has a motor, a motor speed control unit and a controller arranged to control the motor to maintain the quantity of air flowing through the system constant. The controller compares the actual motor current with an expected motor current for the fan operating at the desired air quantity and motor speed to determine an actual system operating condition. When the difference between the actual motor current and the expected motor current is greater than a preset range, the motor speed is adjusted to a new motor speed determined based on the actual system operating condition. The system operating conditions may change due to changes in the static pressure of the system such as changes to the ventilation ducting or external wind pressure.

Abstract: A planetary gear transmission has a gearbox, multiple stages of planetary gears, and an output shaft. Except for the last stage, each planetary gear stage shares a common first internal gear ring. Each stage has a sun gear, a planet carrier, and multiple planet gears. The sun gear of each stage, except for the first stage is integrally formed with or fixed to the planet carrier of an immediately preceding stage. The last stage of the transmission has a second internal gear ring. The planet gears of the last stage mesh with the second internal gear ring. The second internal gear ring includes a support portion, and the output shaft passes through and is rotatably supported by the support portion.

Abstract: A step-down circuit has a switch connected in series between a direct current power supply and a load. A switch control circuit is configured to turn the switch off when the voltage across the load is higher than a predetermined first threshold and turn the switch on when the voltage across the load is lower than the first threshold. An energy storage unit is charged by the power supply when the switch is on and supply power to the load when the switch is off. An overcurrent protection circuit turns the switch off when the input current of the switch is higher than a predetermined second threshold.

Abstract: A brush plate has an insulating substrate, at least one pair of brushes mounted on the insulating substrate, and a conductor for supplying power to the brushes. The conductor includes at least one overheat protection portion having a smaller cross sectional area than adjacent portions of the conductor. By integrally forming the overheat protection portions on the conductors, no extra overheat protection device is required. Preferably, the overheat protection portion has a bent structure. The bent structure may be U-shape, Z-shape, M-shape or wave-shape. The bent structure can increase the anti-shock capability of the conductor and shorten the response time of the overheat protection portion.

Abstract: A ventilation assembly, particularly for a vehicle, has a cowl with a conduit for air flow. The conduit has a first portion and a second portion having a smaller diameter and a joining portion joining the first and second portions. A fan is disposed in the conduit. The fan has an impeller with a peripheral ring having a lip. An annular passage is formed between the ring and the conduit. The lip has a substantially frusto-conical shape; and the joining portion of the conduit has a substantially frusto-conical shape, with an inclination angle (?) at least approximately corresponding to that of the lip of the impeller. The inclination angle (?) is between 115° and 145°.

Abstract: A diffuser includes a body and diffusion blades disposed at a circumferential edge of the body. The body includes an air inlet side and an air outlet side. Each diffusion blade has an inclined guide surface. The guide surface has a starting end at the air inlet side of the body and a terminating end adjacent the air outlet side of the body. The guide surface extends from the starting end to the terminating end along a circumferential path and has a width gradually increasing from the starting ending to the terminating end. The diffuser further includes air outlets at the terminating ends of the guide surfaces. Each air outlet fluidly connects the terminating end of a corresponding one of the guide surfaces and the air outlet side of the body. A blower employing the diffuser is also provided.

Abstract: A starter for an internal combustion engine includes an electric motor and a solenoid switch. The solenoid switch includes a housing, a fixed core, a movable core, two spaced contacts, and a conductive member arranged to interconnect the contacts when the solenoid is turned on. The movable core is connected to a pinion of the motor which is movable to engage with a flywheel of the engine. The fixed core includes a pull-in coil of aluminum wire, a holding coil of copper wire, and a magnetic core. The motor is connected in series with the pull-in coil. When the solenoid is energized, the coils generate a magnetic field that attracts the movable core to the magnetic core, thereby the moving the pinion into engagement with the flywheel and causing the conductive member to interconnect the contacts.

Abstract: A gearbox includes a main housing, a cover, a worm wheel and an output shaft. The main housing includes a receiving chamber having a bottom and a hub. The cover is mounted to an opening of the receiving chamber. The worm wheel is mounted in the receiving chamber. The output shaft is mounted to a center of the worm wheel and coaxially rotatable with the worm wheel. The output shaft extends outwardly through the hub from the receiving chamber. The hub directly supports either the worm wheel or the output shaft.