Abstract: An electric connecting structure is provided, which includes an outer casing, at least two electrical connection terminals, at least two cables, and an electronic component. At least part of each electrical connection terminal is fixed in the outer casing. Each of the at least two cables has an end connected to the corresponding electrical connection terminal. The electric connection structure further includes at least one cable holder molded onto the at least two cables and mounted in the outer casing. The electronic component is connected between the ends of the at least two cables. The electric connection structure can simplify the wiring operations and consequently reduce the time and costs required for the wiring operations.

Abstract: A single phase permanent magnet motor includes a stator and a rotor. The stator includes a stator core and a stator winding. The stator core includes an outer yoke, teeth extending inwardly from the outer yoke, and pole shoes extending from inner ends of the teeth. The rotor is received in a space cooperatively defined by the pole shoes. The rotor includes circumferentially arranged permanent magnetic poles. An outer circumferential surface of the permanent magnetic poles is concentric with an inner circumferential surface of the pole shoes, such that a uniform air gap is formed between the pole shoes and magnetic poles. The single phase permanent magnet motor forms the uniform air gap, which reduces the vibration and noise. The pole shoes form invisible positioning slots, which avoids the negative effect of the positioning slots to the thickness of the air gap and reduces the startup dead point.

Abstract: A fan and a motor drive device thereof are provided. The motor drive device is configured to drive a motor and includes a control management unit and a voltage converter. The control management unit classifies target rotation speed signals provided by an ECU into multiple rotation speed ranges, each corresponding to a specific output duty ratio. The control management unit receives a target rotation speed signal transmitted from the ECU in a real-time manner, and output a voltage regulating signal, which is a pulse width modulation signal having a duty ratio corresponding to one of the rotation speed ranges in which the target rotation speed signal transmitted from the ECU falls. The voltage converter is connected between a power source and the motor, and is configured to regulate a voltage outputted to the motor in response to the voltage regulating signal having the specific duty ratio outputted from the control management unit, to regulate a rotation speed of the motor.

Abstract: A motor includes a housing, a stator and a rotor. The stator is disposed in the housing. The rotor is rotatably supported on the stator. The motor further includes a shock absorbing member and a fastener. The fastener extends through the shock absorbing member and the stator, and the fastener is fixedly connected to the housing. The motor of the present invention operates with low noise. The present invention further provides a fluid delivery device using the motor.

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 gear pump has a pump body, a pump cylinder connected with the pump body, a driving gear and a driven gear meshed with each other and disposed in the pump cylinder, and a rotor driving the driving gear through a driving shaft, and a sealing member. The pump cylinder is located between the pump body and the sealing member. The driving gear is mounted to or integrally formed with the driving shaft. The open end of the sealing member extends out of the outer housing and is sealingly connected with the pump cylinder so as to form a cavity, and the rotor and the driving gear mounted on the driving shaft are received in the cavity and have a coaxiality with the stator.

Abstract: A diffuser, an airflow generating apparatus, and an electrical device are provided. The airflow generating apparatus includes a motor; an impeller including blades with air passages formed therebetween; and a diffuser including diffusing vanes with diffusing channels formed therebetween. In a flow region defined between a terminating end of one diffusing vane and a starting end of another adjacent diffusing vane, an intersection line between a bottom of the diffusing channel between the two diffusing vanes and its circumferential section includes a front arcuate line segment and a subsequent straight line segment, the arcuate line segment extends curvedly, outwardly and downwardly from or from adjacent an inlet end of the diffusing channel, the straight line segment connects to the arcuate line segment and extends to an outlet end of the diffusing channel. The diffusing channel is designed to improve the operating efficiency of the airflow generating apparatus.

Abstract: A fan of a vacuum cleaner includes a motor, an impeller, and a diffuser. The diffuser includes a bottom plate and guide vanes disposed on the bottom plate. The guide vanes are evenly spaced and arranged along a circumferential direction of the bottom plate. Each guide vane extends obliquely from an inner edge to an outer edge of the bottom plate. An outer end of each guide vane extends beyond the outer edge of the bottom plate. Each guide vane is deflected an angle of 30 to 70 degrees with respect to a tangential direction of the bottom plate at the inner end of the guide vane. The outer end of each guide vane is deflected an angle of 35 to 120 degrees along a circumferential direction with respect to the inner end of the guide vane.

Abstract: A linear stepper motor includes a stator, a rotor, a cover and a longitudinally displaceable actuating rod. The stator is formed as a fully overmoulded stator assembly. The stator assembly includes a stator overmould. The rotor is received in the stator and includes a spindle. The cover is coupled to the stator assembly on the drive side of the linear stepper motor. The actuating rod is guided by the stator assembly. The spindle is only supported by its tips between two bearing balls between a stator recess of the stator overmould and a cover recess in the cover. A device and a method for manufacturing the linear stepper motor are also provided.

Abstract: A motor stator includes a stator core and a number of stator windings. The stator core includes a stator yoke and a plurality of stator tooth wrapped by a bobbin formed with an over-molding process, and further correspondingly wound around by stator windings. The stator teeth are connected to an inner surface of the stator yoke. A motor including the above motor stator and a rotor is also provided. The rotor includes a rotor core and a rotary shaft fixed relative to the rotor core. The rotor core is received in the bobbin and in magnetic coupling with the stator teeth.

Abstract: An electrical contact switch for use in an electrical contactor, which comprises first and second electrical terminals, an electrically-conductive busbar in electrical communication with the first electrical terminal, and at least one fixed electrical contact which is attached to the electrically-conductive busbar. The switch also has an electrically-conductive moveable arm in electrical communication with the second electrical terminal, with at least one moveable electrical contact which is attached to the electrically-conductive moveable arm to form an electrical contact set with the fixed electrical contact. A fixed ferromagnetic element is positioned at or adjacent to a side of the electrically-conductive moveable arm proximate the second electrical terminal, and a moveable ferromagnetic element is provided in physical communication with a side of the electrically-conductive moveable arm which is opposite to the fixed ferromagnetic element.

Abstract: The invention relates to an electric rocker switch with an actuating element designed as a rocker. The rocker is thereby moveable back and forth between two positions, namely between an on position and an off position. The rocker is pivotably mounted on the housing for this purpose. The rocker interacts with a leaf spring, the upper end of the leaf spring is firmly clamped at the rocker via a longitudinal area and the lower end of the leaf spring is tiltably arranged on a contact element. The leaf spring has one stable arch shape in the on position and another stable arch shape in the off position with a curve oriented opposite the arch shape. The electric rocker switch according to the invention shows in an advantageous way symmetrical haptics for the on position and also for the off position, wherein the position of the rocker indicates the corresponding position.

Abstract: A motor-driven integrated circuit comprises a PWM output unit and an overcurrent comparator coupled with the PWM output unit. The overcurrent comparator receives a detection signal and compares the detection signal with a reference value. When the detection signal is larger than the reference value, the overcurrent comparator outputs an overcurrent protection signal to control the PWM output unit enter an overcurrent protection mode.

Abstract: A PMDC motor includes a housing, a stator magnet fixed to the inner circumferential surface of the housing, a rotor core received in the housing and facing the stator magnet, and rotor windings wound around the rotor core. The rotor core includes a plurality of rotor teeth, each of the rotor teeth including a tooth body and a tooth tip. A ratio of the outer diameter of the rotor core to an outer diameter of the housing is in the range of 0.6 to 0.67. Compared to the existing PMDC motor, the PMDC motor of the present invention can satisfy the same performance requirement, while reducing the size and weight of the rotor core and hence the weight of the rotor windings. In this way, the total weight and hence the moment of inertia of the rotor is reduced, thereby effectively reducing the noise generated during operation of the motor.

Abstract: A brush used to contact with a commutator, includes a brush body which includes two opposite axial end faces and a protruding portion projecting from the brush body toward the commutator. The protruding portion includes a first surface, a second surface and at least two teeth. The first surface and the second surface are respectively adjacent to the two axial end faces. Angles formed between the first surface and the second surface and corresponding adjacent axial end faces are obtuse. The teeth is located between the first surface and the second surface, and extends generally along a circumferential direction of the commutator. The ratio of a total width of the at least two teeth in an axial direction of the brush to an axial height of the brush body is in the range of 0.25-0.75. An electric motor including the brush is also provided.

Abstract: A brushless direct current electric motor includes a first sub-motor and a second sub-motor. The first sub-motor and the second sub-motor share a common rotor, and each comprises an independent stator. The stators of each sub-motor comprises a plurality of teeth and a plurality of windings. The teeth of the first sub-motor and the teeth of the second sub-motor are interleavingly arranged in a circumferential direction or arranged side by side in an axial direction. The first sub-motor and the second sub-motor are configured to cooperatively work as a single electric motor to output a normal power. When one of the sub-motors breaks down, the other sub-motor can be operated independently to enhance reliability and safety of the brushless direct current electric motor.

Abstract: A motor driving circuit, an application device, and a motor braking method are provided. The driving circuit includes an inverter, a braking unit, and a MCU. The inverter is configured to drive a motor. The braking unit includes a sampling circuit, a discharge circuit, and a switch group. The MCU is connected to the sampling circuit, the discharge circuit, and the switch group, and is configured to control the sampling circuit to detect a voltage across the inverter and obtain a detected value when receiving the emergency signal, compare the detected value to a preset voltage or a preset voltage range, and transmit a control signal to activate the discharge circuit when the detected value is greater than the preset voltage or exceeds the preset voltage range.

Abstract: A switching device includes a switch and an actuating element. The actuating element for a switch includes a U-shaped actuating section. The actuating section includes two different arms with different lengths. The long arm is configured to transfer force to a button of the switch and a free end of the long arm is configured for holding the actuating element. The short arm is configured for the force input and is arranged aligned obliquely to the long arm.

Abstract: A pump device includes a casing, an impeller, a base, and a motor. The casing includes a pump chamber, and an inlet and an outlet. The impeller is accommodated in the pump chamber. The motor is connected to the casing for driving the impeller to rotate and includes a rotor chamber for receiving a rotor. The base is disposed between the impeller and the motor and includes an accommodating groove having an inlet port in communication with the rotor chamber to allow fluid in the pump chamber to enter into the rotor chamber. In the pump device, precipitation has been performed to fluid in the accommodating groove before the fluid enters into the rotor chamber, thus the impurity particles can be prevented from entering into the rotor chamber, thereby prolonging the service life of the pump device.

Abstract: A resolver which includes a resolver rotor and a resolver stator. The resolver stator includes a resolver stator core, a winding bracket mounted on the resolver stator core, and a plurality of resolver windings wound on the winding bracket. The winding bracket includes an annular portion surrounding the resolver rotor, a connector extending outwardly from the annular portion, and a cover mounted on the connector. The connector includes a plurality of conductive terminals connecting both the resolver winding and lead wires, and a body receiving the conductive terminals. The cover abuts against the lead wires to secure the lead wires to connector.