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 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: Sensitive data is protected in a software product. A source file of the software product is compiled to generate an object file, in which the source file includes at least one piece of sensitive data marked with a specific identifier. The object file has a secure data section for saving storage information of the at least one piece of sensitive data at compile-time and run-time. The object file is linked to generate an executable file. The executable file updates the secure data section at run-time. Sensitive data is also protected when a core dump is generated.

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 fan and a motor thereof are provided. The motor includes a motor drive device. The motor drive device includes a printed circuit board. A control management unit and a voltage converter are arranged on the printed circuit board, the control management unit classifies target rotation speed signals provided by an ECU into multiple rotation speed intervals, with each rotation speed interval corresponding to a fixed duty ratio. The control management unit receives a target rotation speed signal transmitted from the ECU in a real-time manner, and outputs a pulse width modulation signal having a duty ratio corresponding to the rotation speed interval to which the target rotation speed signal transmitted from the ECU belongs.

Abstract: An actuator for an electric parking brake system includes an outer housing, a motor, a planetary gear mechanism and a belt-wheel mechanism that are received in the outer housing, and an isolation member. The belt-wheel mechanism includes a driving wheel, a follower wheel, and a transmission belt. The driving wheel is connected with the motor. The follower wheel is connected with the planetary gear mechanism. The isolation member has a first spacer fixed to the driving wheel via the motor, a second spacer fixed to the follower wheel, and a buffering element disposed between the second spacer and the outer housing. The second spacer is disposed above and assembled to the first spacer. The isolation member defines the center-to-center distance between the driving wheel and the follower wheel, and absorbs vibrations from the motor and the planetary gear mechanism.

Abstract: The present disclosure discloses an arbitration processing solution when brain split occurs in cluster. The solution includes: receiving, by the quorum storage apparatus, first master quorum node preemption requests within a first master quorum node preemption detection period sent by the at least two quorum nodes when brain split occurs in the cluster; sending, by the quorum storage apparatus, a first master quorum node preemption success response message to the initial master quorum node when the first master quorum node preemption request sent by the initial master quorum node is received; where the first master quorum node preemption success response message indicates the initial master quorum node succeeds in master quorum node preemption.

Abstract: The present disclosure discloses an arbitration processing solution when brain split occurs in cluster. The solution includes: receiving, by a quorum storage apparatus within a first refresh packet detection period, first master quorum node preemption requests sent by at least two quorum nodes in the cluster; sending, by the quorum storage apparatus, a first master quorum node preemption success response message to the initial master quorum node indicating that the initial master quorum node succeeds in master quorum node preemption when the first master quorum node preemption requests received within the first refresh packet detection period comprise the master quorum node preemption request sent by the initial master quorum node.

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 vehicle window lift control system includes a window lift motor, a motor drive/control module, an inverter, a rotor position sensing unit, and an anti-pinch module. The window lift motor is a brushless direct current motor. The anti-pinch module detennines whether or not the vehicle window is in an anti-pinch area based on position feedback signals generated by a rotor position sensing unit that is inherently included in the brushless direct current motor. When the vehicle window is in the anti-pinch area, an obstacle judgment unit is initiated. When there is an obstacle, an anti-pinch instruction unit sends an anti-pinch instruction to the motor drive/control module, and the motor drive/control module drives the inverter according to the anti-pinch instruction to make the motor rotate reversely. The present vehicle window lift control system has the advantages of small size, low failure rate and low cost.

Abstract: A method for processing a fault of a lock server in a distributed system is disclosed, where the distributed system includes m lock servers, which locally store same lock server takeover relationship information. Lock servers in the distributed system that are not faulty receive a notification message, which carries information about a fault of a first lock server; after receiving the notification message, a second lock server determines that it is a takeover lock server of the first lock server according to the lock server takeover relationship information, and the takeover lock server enters a silent state; after receiving the notification message, a third lock server in the distributed system determines that it is not the takeover lock server of the first lock server according to the lock server takeover relationship information. After receiving a locking request, the third lock server allocates lock permission information according to the locking request.

Abstract: A fuse component configured to provide overcurrent protection for an electric motor comprises a spiral fuse portion and a magnetic core. The spiral fuse portion encloses at least a part of the magnetic core, so that the fuse component is also configured to function as a choke of the electric motor.

Abstract: The invention relates to a motor and a resolver thereof. The resolver includes a resolver stator (70), a resolver rotor (80). The resolver includes (70) a plurality of resolver stator teeth (73) and resolver stator windings (75) wound around the resolver stator teeth (73). The resolver rotor (75) includes a resolver rotor core (81) received in a space surrounded by the resolver stator teeth (73) and capable of rotating around a shaft axis. The resolver stator windings (75) includes first output windings wound around each of the resolver stator teeth (73) by a first number of turns, second output windings wound around each of the resolver stator teeth by a second number of turns, and exciting windings wound around each resolver stator teeth by a third number of turns.

Abstract: A self-locking mechanism has a driving member, a driven member, a stationary member, a lock holder and a number of lock elements. The lock holder encircles the driving member and the driven member. The lock holder has a support base and ribs extending from the support base. A lock element is coupled to the axial end portion of each rib. The lock elements are radially positioned between a radially outer surface of the driven member and the inner wall of the stationary member. The distance between the radially outer surface and the inner wall gradually decreases from a center to opposite circumferential sides. The maximum distance between the radially outer surface and the inner wall is greater than the diameter of the lock element, and the minimum distance is less than the diameter of the lock element.

Abstract: A commutated DC motor (10) includes a stator (12) and a rotor (14) mounted in the stator (12). The stator (12) has 2P magnetic poles, wherein P is an integer greater than 1. The rotor (14) includes a rotor shaft (81) with a rotor core (85), and a commutator (83) fixed thereto. The rotor core (85) has multiple teeth defining m×P slots therebetween, wherein m is an odd integer greater than 1. The commutator (83) has k×m×P segments, wherein k is 1 or 2. A rotor winding (87) formed by winding a single continuous wire is received in the slots of the rotor core (85) and connected to the segments of the commutator (83), and has k×m winding units. Each winding unit includes P coils in series connection and is directly connected to only two segments.

Abstract: An actuator for an electric parking brake system has an outer housing. A planetary gear train and an electric motor are disposed in the outer housing. At least one gear connects the motor to the planetary gear train. The planetary gear train comprises a multi-stage planetary gear mechanism. A gear housing accommodates the planetary gear mechanism. The planetary gear train further comprises a centering pin extending through the gear mechanism, such that the planetary gear mechanism rotates about the centering pin. Each stage has a sun gear, a ring gear, a plurality of planet gears meshed with the sun gear and ring gear, and a planet carrier rotatably supporting the planet gears.