Abstract: A vibration actuator that can prevent reduction of vibration performance and durability of the vibration actuator and that can prevent occurrence of operation failure and noise when the vibration actuator had impact from the outside is provided. The vibration actuator includes a cylindrical casing having a first coil and a second coil, a movable element arranged inside the casing and having a magnet, and a first inner guide and a second inner guide arranged between the first coil and the second coil, and the movable element 4 and having extending portions and which sandwich and hold a part of the first coil and the second coil together with the casing.

Abstract: An axial flux electric machine includes a casing, stator cores, windings, and fins. The casing has a hollow cylindrical shape with an inner radial surface and an outer radial surface. The stator cores are spaced circumferentially along the inner radial surface of the casing. The windings are wrapped around the stator cores. The fins project from the inner radial surface of the casing to spaces between the windings.

Abstract: A cooling device for an electric drive unit of a motor vehicle includes a housing and at least one cooling structure. The housing is configured to receive the at least one component of the drive unit. The housing, at least in some regions thereof, is a cooling jacket for the at least one component and being configured to cool the at least one component. The cooling jacket having at least one cooling duct through which a cooling fluid is flowable. The at least one cooling structure is an insert inserted into the at least one cooling duct and is configured to increase a flow resistance of the cooling fluid by generating turbulences of the cooling fluid.

Abstract: An ultrasonic imaging device includes a plurality of ultrasonic transducers arranged in rows and columns. Each transducer has a lower electrode and an upper electrode. In each row, any two neighboring transducers of the row respectively have their lower electrode and their upper electrode connected to each other, or their upper electrode and their lower electrode connected to each other and in each column, any two neighboring transducers in the column respectively have their lower electrode and their upper electrode connected to each other, or their upper electrode and their lower electrode connected to each other.

Abstract: A rotor for a rotating electric machine includes a rotor core provided with a pair of first magnets and a pair of second magnets that are located closer than the first magnets to an outer peripheral side of the rotor core. The rotor core includes a caulking portion disposed in a region between first and second imaginary lines in a radial direction of the rotor core. The first imaginary line is an arc passing through outer-peripheral-side end portions of respective long sides of rectangular-shaped cross sections of the first magnets. The second imaginary line is an arc passing through inner-peripheral-side end portions of respective long sides of rectangular-shaped cross sections of the second magnets. The arc of each of the first and second imaginary lines has a center of curvature that lies at an intersection of extensions of the long sides of the rectangular-shaped cross sections of the second magnets.

Abstract: A motor cooling structure, including: branch flow-channels, shell flow-channels, end cover flow-channels, a liquid inlet and a liquid outlet. A plurality of the branch flow-channels are circumferentially arranged on a stator of a motor around an axis of the motor. The shell flow-channels includes a liquid inlet flow-channel, a plurality of shell long flow-channels and a liquid outlet flow-channel, which are circumferentially arranged on a reducer shell around the axis of the motor. The end cover flow-channels includes a plurality of the end-cover long flow-channels are circumferentially arranged on a motor end cover around the axis of the motor. The shell flow-channels, the plurality of branch flow-channels and the end cover flow-channels form a continuous total flow-channel. The liquid inlet and liquid outlet both disposed on the reducer shell are in communication with the liquid inlet flow-channel and liquid outlet flow-channel, respectively.

Abstract: An insulator, a stator, and an electric motor capable of improving molding accuracy and assemblability are provided. An insulator 26 includes a first insulator 61 and a second insulator 62 to be attached from both axial sides of a stator core. The first insulator 61 has a first core end surface covering portion 65 and a first skirt portion 79. The second insulator 62 has a second core end surface covering portion 265 and a second skirt portion 279. The insulator 26 includes a coil lead-out portion 77 provided integrally with only the first core end surface covering portion 65 for leading out terminal portions of coils from the first insulator 61 to the outside. A length of the longest portion of the second skirt portion 279 in the axial direction is greater than a length of the longest portion of the first skirt portion 79 in the axial direction.

Abstract: A rotor assembly includes a shaft defining a lubricant inlet channel for receiving a lubricant and a lamination stack. The lamination stack is rotatably coupled to the shaft, extends between first and second lamination stack ends, and defines a lubricant cooling channel in fluid communication with the lubricant inlet channel. The rotor assembly also includes a first end cap adjacent to the first lamination stack end and a second end cap adjacent to the second lamination stack end. One of the first end cap and the second end cap defines an end cap inlet at a first radial distance from the shaft, a lubricant outlet channel defined to extend at least partially radially inward toward the shaft, and an end cap outlet at a second radial distance from the shaft which is less than the first radial distance for expelling the lubricant.

Abstract: An electric power unit includes: a rotary electric machine unit an electrical unit disposed above the rotary electric machine unit; and a cooling unit. The electrical unit includes a protrusion protruding outward from a left end portion of the rotary electric machine housing portion of the rotary electric machine in a left-right direction. The cooling unit includes: a cooling fan configured to generate cooling air by rotating integrally with a rotary shaft of the rotary electric machine; and an air guide unit configured to guide the cooling air. The air guide unit includes cooling air flow paths provided between the cooling fan and the electrical unit. The closer to the protrusion of the electrical unit a cooling air flow path is disposed, the larger opening area of the introduction port the cooling air flow path has.

Abstract: An electric machine for driving a motor vehicle includes a rotor having a central rotor shaft and a laminated core which is made of multiple rotor laminations and is fixed to the rotor shaft. The laminated core is contacted on at least one axial side by an end lamination which produces a tolerance compensation, said end lamination being supported by a securing ring pressed onto the rotor shaft.

Abstract: A cooling system is provided. Coil ends protrude outward from a first end of a stator core in a direction along a central axis. An imaginary straight line is orthogonal to both of a central axis of a core body and an axis extending in an up-down direction. Half the coil ends above the imaginary straight line are in a first portion. Each of the segment coils in the first portion includes an outer peripheral surface that faces in a direction opposite from the central axis. The outer peripheral surface of each of the segment coils includes a twisted surface. The direction in which the twisted surface faces becomes closer to the direction facing the stator core as the twisted surface extends toward the first end of the stator core.

Abstract: An electromagnetic propulsion unit for a land-based wheeled or tracked vehicle is provided. The propulsion unit includes a balancing plate assembly with an outer plate designed to couple to a rotor assembly. In the balancing plate assembly, the outer plate includes a lip that, during rotor assembly rotation, pumps one or more fluids from an air gap formed between the rotor assembly and a stator and the outer plate is constructed out of a non-electrically conductive material.

Abstract: A rotor for an induction motor includes a rotor core having a hollow portion on a central portion wherein a shaft is coupled to the rotor core by being inserted through the hollow portion, a plurality of slots radially formed in the rotor core around a central axis of the shaft, a plurality of conductor bars coupled to the plurality of slots, and an end ring electrically connecting the plurality of conductor bars to each other, wherein the rotor core is thermally treated above Curie temperature to form a predetermined pattern on an outer circumference of the rotor core.

Abstract: A motor controller includes a housing, a power circuit board, and a control circuit board. The housing includes a first mounting platform, a second mounting platform, and a side wall. There is a height difference between the first mounting platform and the second mounting platform. The first mounting platform is disposed on an upper part of the side wall, and the second mounting platform is disposed on a middle part of the side wall. The second mounting platform is disposed on one side of the first mounting platform. The first mounting platform and the side wall form an upper chamber, and the control circuit board and the power circuit board are disposed in the upper chamber. The control circuit board is closer to the first mounting platform than the power circuit board. The second mounting platform and the side wall form a lower chamber communicating with the upper chamber.

Abstract: A blower includes a stationary portion including an inlet and an outlet, a rotating portion provided to the stationary portion, and a motor adapted to drive the rotating portion. The inlet and outlet are co-axially aligned. The stationary portion includes a housing, a stator component provided to the housing, and a tube providing an interior surface. The rotating portion includes one or more bearings that are provided along the interior surface of the tube to support a rotor within the tube. In an embodiment, the blower is structured to supply air at positive pressure.

Abstract: An axial-gap coreless rotary electric machine includes rotors, stators, and a case. Armature coils of the stators include a first coil segment and a second coil segment facing the first coil segment. The case includes a first case segment and a second case segment facing the first case segment.

Abstract: The invention relates to a geared motor comprising a first brushless electric motor part having a stator, a rotor and a drive shaft, a second part having an output shaft and a reduction gear mechanism and an electronic part. The reduction gear mechanism comprises an output shaft, a worm and a toothed wheel designed to be engaged by the worm and to drive the output shaft in rotation. The geared motor comprises at least one rolling guide bearing disposed on the drive shaft and a multipolar magnet for measuring the position of the rotor. The rolling bearing is disposed between the measurement magnet and the worm such that the electric motor can be controlled depending on the measurement of the position of the rotor.

Abstract: An adaptive article of apparel can include a textile with an opening that is configured to admit a body part of a wearer, and an electroadhesive clutch secured to the textile and extending around at least a portion of the opening. The electroadhesive clutch can be configured to permit or inhibit changing a size of the opening.

Abstract: The application discloses coils of an electrical machinery and a method for forming the coil, a stator of an electrical machinery and a method for forming the stator, and an electrical machinery. The method includes: providing a first conductor and a second conductor, a resistivity of the second conductor being lower than a resistivity of the first conductor; obtaining a rated current rising coefficient according to a desired power of the electrical machinery, the rated current rising coefficient being a ratio of a rated current of the electrical machinery with the desired power to a rated current of a reference electrical machinery; obtaining, according to the rated current rising coefficient, a first conductor turn number of the first conductor and a second conductor turn number of the second conductor in each coil; forming the coil according to the first conductor turn number and the second conductor turn number.

Abstract: A permanent magnet rotor structure for an underwater motor, an underwater motor and underwater equipment, related to the field of motors. The permanent magnet rotor structure for the underwater motor includes a rotor end cover; a plurality of permanent magnets arranged on an inner circumferential surface of the rotor end cover; a protective attachment structure arranged on surfaces of the plurality of permanent magnets; and an adhesive layer for adhering the protective attachment structure to the surfaces of the plurality of permanent magnets and covering the protective attachment structure. The permanent magnet rotor structure has characteristics of corrosion resistance and wear resistance, so that the service life of the underwater motor comprising the permanent magnet rotor structure can be prolonged.