Abstract: A mechanical connection unit for fastening an electrical coupling element to an interconnection ring of an electric machine. The connection unit includes a fixing component, which can be interlockingly and/or frictionally positioned on the interconnection ring, and a receiving component, which is rotatably mounted on the fixing component and is provided for releasably fixing the electrical coupling element. The receiving component can be rotated from a first position to a second position for removal of the electrical coupling element.

Abstract: A method for fault processing of HALL position sensor in brushless direct current motor, comprising: step (1) detecting HALL signals by an edge detection, and recording the times of edge hopping; step (2) determining whether the absolute value of a difference between the rotor position change represented by HALL and an angle value calculated internally by MCU is within the preset error range; if so, updating the angle value to the angle representing the rotor position that is detected by HALL, otherwise, increasing the MCU internal angle value according to an angle increment previously calculated through a motor rotation speed; step (3) obtaining an acceptable range based on an original value of the previous angle increment. The present invention provides an internal degree to record angle, and the motor commutation is accomplished according to the degree angle value recorded by the internal degree.

Abstract: An electric axial flow machine having a stator, a first rotor body arranged on a rotor shaft, a second rotor body arranged on the rotor shaft, and a displacement device arranged between the two rotor bodies and coupled thereto. The displacement device includes at least one spring device which acts on the first rotor body and the second rotor body against the magnetic attractive force between the rotor body and the stator. The spring device is configured such that a spring force characteristic is formed which runs above the magnetic force characteristic over the entire displacement path.

Abstract: An electric machine arrangement with first and second electric machines, each having a stator and a rotor, and a common housing in which the electric machines are arranged axially adjacently. Respective output shafts are rotationally fixed with the rotors of the first and second electric machines. The rotor of the first electric machine, on its side away from the second electric machine, is arranged with radial support of a supporting part of the housing rotatably mounted by a first bearing, and the rotor of the second electrical machine, on its side facing away from the first electric machine, is arranged with radial support of the supporting part in a manner rotatably mounted by a second bearing. One of the rotors is supported radially against the other by a third bearing. The rotor of one of the first or second electric machine is radially supported by a fourth bearing.

Abstract: The present disclosure is directed to slotless electric motor, in particular, to a method of manufacturing a stator for a slotless electric motor. An aspect of the disclosure provides a method of manufacturing a stator for a slotless electric motor, the method comprising: disposing a conductor in the shape of an annular cylinder; bonding a plurality of bonded lengths of the conductor, wherein the plurality of bonded lengths are separated by non-bonded lengths; folding the conductor to provide a plurality of petals repeated along the conductor, wherein each petal comprises a pair of bonded lengths connected by a non-bonded length; rotating each petal about a point on the second circle to align in parallel the bonded lengths of all of the petals to thereby provide a stator comprising a cylindrically-shaped conductor wherein the bonded lengths are equidistantly disposed around and from a central longitudinal axis of the cylindrically-shaped conductor.

Abstract: A vibration power generation device that further improves power generation efficiency includes a vibration exciting body in which vibration is caused by a flowing fluid, a vibrated body that is oscillatable and connected to the vibration exciting body, and a power generator to generate electricity by oscillation of the vibrated body. The vibration exciting body is in proximity to a wall surface, and vibration is caused in the vibration exciting body by a fluid flowing along the wall surface.

Abstract: The present disclosure discloses a linear motor module, including a mounting base, a magnet mounting seat arranged on the mounting base, three stators arranged on the magnet mounting seat and composed of array-structured permanent magnet assemblies, linear guide rails arranged on the mounting seat, sliding blocks mounted on the linear guide rails, a moving plate arranged on the sliding blocks, and three inductors arranged on the moving plate and corresponding to the stators. The magnet mounting seat has three mounting surfaces; the three stators are separately located on the three mounting surfaces; the three inductors are arranged in a one-to-one correspondence to the three stators; and an angle between two adjacent stators is 60 degrees. The linear motor module of the present disclosure is reasonable in structural design.

Abstract: An embodiment provides a motor comprising: a housing having an opening; a stator disposed inside the housing; a rotor arranged to correspond to the stator; a shaft coupled to the rotor; and a cover arranged to cover the opening, wherein: the cover comprises a plate part, a protruding part formed to protrude from the plate in the axial direction, and a plurality of protrusions formed to protrude from the protruding part in the axial direction; and the thickness (T2) of the protrusions in the radial direction is larger than the thickness (T1) of the protruding part in the radial direction. Accordingly, through the structural shape of the cover, the motor can minimize foreign matter produced when the cover is press-fitted into the housing.

Abstract: Provided is an actuator including: a housing having first and second accommodation spaces; a driving motor having a BLDC type motor installed in the first accommodation space of the housing and generating a rotational output from a rotor; a printed circuit board (PCB) mounted on an upper side of the driving motor and having a motor driving circuit mounted for generating a motor driving signal according to reception of an external control signal; a gear train installed on an upper portion of the PCB in a longitudinal direction to reduce the rotational output of the driving motor to increase torque; and an output shaft installed in the second accommodating space of the housing and outputting a torque increased rotational output transmitted through the gear train to the outside of the housing.

Abstract: An electric machine arrangement includes an electric machine having a stator and a rotor, a component supporting the stator, and an output element that is in contact with the rotor for conjoint rotation therewith. The stator is supported relative to the rotor via at least a first bearing in such a way as to be decoupled from the rotary motion of the rotor.

Abstract: A stator includes a stator core having a plurality of slots, and a plurality of segment coils, each of which has an insulating film, the plurality of segment coils each including an inclined portion and a rising portion. the rising portions that are adjacent to each other in a radial direction of the stator core being joined to each other. Each of the plurality of segment coils includes first peeled portions each in which the insulating film facing the circumferential direction of the stator core is peeled in a lengthwise direction, and second peeled portions each in which the insulating film facing the radial direction of the stator core is peeled in the lengthwise direction, and a peeling length of the first peeled portion is longer than a peeling length of the second peeled portion.

Abstract: A power tool including a housing, a controller within the housing, and a brushless motor within the housing and controlled by the controller. The brushless motor including a stator assembly including a stator core having stator laminations with an annular portion and inwardly extending stator teeth. The stator assembly defines a stator envelope in an axial direction extending between axial ends of stator end caps of the stator assembly. The brushless motor further includes a rotor assembly including a rotor core having rotor laminations and defining a central aperture that extends in the axial direction and that receives a shaft, and a position sensor board assembly including position sensors and configured to provide position information of the rotor core to the controller. The rotor assembly and the position sensor board assembly are provided at least partially within the stator envelope.

Abstract: Magnetic coupling devices are disclosed. The magnetic coupling devices may include at least one permanent magnet and at least one ferromagnetic core. The at least one permanent magnet may surround the at least one ferromagnetic core.

Abstract: A stator (10) according to the present invention comprises: a yoke part (11) composed of a plurality of block bodies having an arc shape with a rectangular cross section; fixing members (12, 13) for disposing and fixing the plurality of block bodies in an annular shape; a plurality of teeth parts (14) erected on the peripheral surface of the yoke part; and a coil (15) wound around the plurality of teeth parts (14).

Abstract: An electric power generator comprises a rotor and a plurality of stators arranged coaxially and concentrically about a central axis. A first stator is provided concentrically around and adjacent to the rotor, the rotor and the first stator being separated by a rotor-stator airgap and a second stator is provided concentrically around and adjacent to the first stator, the first and second stators being separated by a stator-stator airgap. The rotor includes a plurality of magnetic pole structures configured to provide or generate a plurality of magnetic poles and a radially outer surface of each of the magnetic pole structures is curved with an average radius of curvature which is less than an average distance between the outer surface and the central axis. The rotor-stator airgap thus varies circumferentially in distance, with a shortest distance being at a circumferential centre of each of the magnetic pole structures and longest distance being at circumferential ends of each of the magnetic pole structures.

Abstract: A rotor shaft arrangement for an electric motor or for an electrodynamic machine. The rotor shaft arrangement has a rotor shaft, and a fluid passage, which is arranged at least partially within the rotor shaft and is designed to carry a cooling fluid along a longitudinal extent direction of the fluid passage. The rotor shaft arrangement furthermore has at least one feed channel, which is arranged at least partially within the rotor shaft and is connected to the fluid passage at one end of the fluid passage. The at least one feed channel is configured and/or designed to produce fluid communication between the fluid passage and a fluid feed that stores the cooling fluid, wherein the feed channel is arranged with respect to the longitudinal extent direction of the fluid passage so as to form a bend at the end of the fluid passage.

Abstract: Electric motor including: a rotor whose rotating shaft extends along an axis of extension, a stator disposed around the rotor, a front bearing and a rear bearing configured to be assembled by forming an internal cavity in which the rotor and the stator are housed, the front bearing comprising a cylindrical portion extending along the axis of extension, and a lid having bell shape that completely covers the rear bearing and at least the cylindrical portion of the front bearing, the lid comprising an internal chamber which extends at least partly around the internal cavity, a heat-transfer fluid inlet and a heat-transfer fluid outlet fluidly connected to the internal chamber so as to allow a heat-transfer fluid to circulate in the internal chamber.

Abstract: An electric machine designed as a permanently excited synchronous machine, including a rotor with a rotor body arranged on a rotor shaft, a stator, and a displacement device that generates a relative axial movement between the rotor body and the stator based on a torque produced between the rotor shaft and the rotor body. The displacement device has first and second displacement elements and at least one rolling body arranged between the first and second displacement elements. The first displacement element is axially movable and rotatable to a limited degree on the rotor shaft, and the second displacement element is connected to the rotor shaft rotationally fixed. The displacement elements provide that upon rotation of the first displacement element relative to the second or vice versa, the rotor body is pushed on the rotor shaft axially against the spring force.

Abstract: To control movement of a transport unit of a linear motor, a quality functional J(SG) with quality terms JTk(SG) is used as a function of manipulated variables (SG) of active drive coils. The quality functional J(SG) controlling movement of the transport unit along the stator is optimized with regard to the manipulated variable (SG) to determine optimal manipulated variables (SGopt) for the relevant time step of the control of movement, active drive coils are energized according to the determined optimal manipulated variables (SGopt), and at least two movement phases are provided during the movement of the transport unit along the stator. In the at least two novement phases, different quality functionals J(SG) are used for determining the optimal manipulated variables (SGopt), the different quality functionals J(SG) differing by the number k of the quality terms JTk(SG) used and/or by the quality terms JTk(SG) and/or by the weighting factors kk.

Abstract: The technical solution relates to the field of electromechanical engineering and can be used in the manufacture of windings for rotating electrical machines (electric motors and electric generators) with or without slots, or for linear electric motors. A coil for manufacturing a polyphase winding for an electrical machine is made in the shape of an isosceles trapezoid from a self-sintering conductor. The active elements of the coil are straight, and the overhangs of the coil are bent at a right angle to the active elements of the coil and are curved along an arc of a circle in the case of rotating electrical machines or are straight in the case of linear electric motors. The dimensions of the trapezoid are determined by the width of the active element of the coil, the width of a tooth of the core, the thickness of the coil and the acute angle of the trapezoid.