Abstract: A drive unit including an electric motor, a drive unit casing accommodating therein the electric motor, an inverter that controls the electric motor and a flow passage in which a refrigerant passes therein in order to cool the inverter, wherein the inverter is mounted on the drive unit casing such that a heat sink, united with a substrate of the inverter, defines a space that is in communication with the flow passage on a portion thereof opposed to the drive unit casing, the space is compartmented by a separator into a first chamber facing the heat sink and a second chamber facing the drive unit casing and the heat sink comprises heat-sink side fins extending into the first chamber and apart from the separator.

Abstract: A dual concentric AC motor allows for two independently operating AC motors that produce the same torque at the same current input as two conventional, separate electric motors while occupying a smaller physical volume. The dual concentric AC motor utilizes a single, hollow cylindrical stator core comprising inner and outer stators and an inner rotor and an outer rotor that operate independently of one another. The inner stator, with windings that face toward the center of the motor, couples to the inner rotor, which rotates inside the single stator core, while the outer stator, with windings that face away from the center of the motor, couples to the outer rotor, which rotates around the single stator core. A back iron, centrally located in the single stator core, physically and magnetically separates the inner and outer stators. The two rotors are coupled to separate, independent output shafts.

Abstract: A motor has a hollow-cylindrical shaped rotary shaft provided with a hollow therein and is mounted on a PCB having an LED as light source. Light emitted from the LED passes through the hollow from one end of the rotary shaft to the other end, and irradiates an indicating needle attached to the other end of the rotary shaft.

Abstract: A molded motor has a motor frame molded by covering a stator made from a straight core, with a molding resin. The straight core has a stack of laminas each having a plurality of tees projecting from one long side of a belt-shaped back yoke and a V-shaped cut formed between every two adjoining tees along the back yoke and on a side from which the tees project. The straight core has an insulating layer thereon, formed by pre-molding from an insulating resin, excluding at least an inner periphery of each tee. The straight core also has a winding formed about each tee having the insulating layer formed thereon. The stator is formed by bending the straight core at cuts made therein into an arcuate or annular shape, and joining the opposite ends of the back yokes to each other by welding or adhesion.

Abstract: An on-vehicle AC generator that comprises a rotor; and a stator including a cylindrical stator iron core in which a plurality of slots extending in axial direction of a shaft are formed to be circumferentially aligned, and which is fitted to and supported in a case to contain the rotor therein, and a stator winding wound about the slot of the stator iron core, and which possesses a high rigidity to secure no deformation by force applied at the time of being fitted to the case. An insulating resin having adhesive properties is applied to an entire surface of the coil end portions. A corner portion formed by outer circumferential surface of the bottom of the coil end portions and an end face in axial direction of the stator iron core is also filled with the adhesive insulating resin.

Abstract: Powder produced by abrasion due to sliding between a brush and a commutator is prevented from moving toward a rotor. A recess is provided between the rotor and a slide face of the brush and the commutator, where powder produced by abrasion at the brush may enter into a motor and increase sliding resistance of the rotor. Thus, there is no such powder produced by abrasion entering into the motor as increasing sliding resistance of the rotor.

Abstract: A liquid-cooled electric motor with a motor shaft, with two bearing plates which are mounted on the end faces of the motor housing and which carry on each side at least one bearing, the motor shaft being mounted rotatably in the bearings, and with at least one rotating hydraulic pump, the drive shaft of which is connected to the motor shaft by way of a coupling and which is driven by the electric motor. The casing of the motor housing receives a cooling liquid, has an at least partially hollow design and forms a casing cavity. At least one connecting duct for the supply of cooling liquid from the casing cavity to the bearings for cooling and lubrication of the bearings is provided in each of the bearing plates and in that said flanged-on hydraulic pump is sealed off in a liquid-tight manner with respect to the bearing plate interiors.

Abstract: A support structure (20) is provided for supporting and spacing apart high-voltage electrical conductors (12) in an electric machine. An exemplary support structure (20) includes an improved spacer block (32,33) that is configured to reduce electrical flashover, in the form of creep, between adjacent high voltage conductors, without necessarily increasing the width of the spacer block. The improved spacer block (32,33) includes a main body (33) and a protruding portion (32), which elongates the creepage path (30) between adjacent high-voltage conductors to greater than the width of the spacer block (32,33).

Abstract: An insulator for an armature wherein the insulator is formed with a slot at one end of the teeth on which the coils are wound to trap the end coil to prevent its axial slippage as the coil end is drawn out.

Abstract: A rotary electric machine includes a rotor for rotation around a rotational axis, a stator core that has a cylindrical shape and includes a slot therein, a cooling unit having a coolant passage, and a casing that accommodates the rotor and the stator core. A stator coil is inserted in the slot of the stator core and has a coil end protruded from a side face of the stator core. An electric part is mounted on the cooling unit and controls a current of the stator core. The rotor is rotatably supported inside of the stator core. The cooling unit cools both the stator core and the electric part. The cooling portion is accommodated in spacing defined by the side face of the stator core and an outer circumference wall of the coil end.

Abstract: A bearing for a high-speed and high-momentum rotating flywheel system for satellite or other applications that enables better recovery when unintended physical contact occurs. This better recovery is achieved through increased impact resistance and wear resistance by using a flat annulus connected to the main shaft of the primary bearing and secondary metal bearing and coating both annuli with rhenium or its alloys. Rhenium has a very high melting point but in the annealed condition is ductile so the rhenium coating is hardened to a very high strength and wear resistance but the rhenium beneath is still ductile. This combination of hard and soft material provides good wear resistance and impact resistance for those times when the primary bearing ceases to operate and contact is made with the secondary bearing.

Abstract: An internal combustion engine has a liquid-cooled electrical machine mounted thereon. The liquid-cooled electrical machine includes a centrally disposed stator having stator windings. A rotor is mounted on a rotatable member for rotation therewith. The rotor extends about the stator. A cooling chamber is disposed within the stator and has an inlet for a coolant and an outlet for the coolant connected thereto.

Abstract: A low-noise electric structure of an electric power steering device for automotive vehicles is provided which includes a controller including a substrate on which drive devices working to drive an electric motor are installed. The drive devices, power supply terminal joints, and motor terminal joints are concentrated on a portion of the substrate, thereby permitting a path of current flowing from the power supply terminal joints to the motor terminal joints to be shortened. This results in a decrease in quantity of heat generated from a circuit line extending between the power supply terminal joints and the motor terminal joints.

Abstract: A brushless motor A includes a permanent magnet used as a rotor 1 that is driven by three-phase power supply, wherein the permanent magnet is magnetized by a trapezoidal magnetization, and the trapezoidal magnetization is applied such that a generation period of a cogging torque is set to almost half of the generation period of the cogging torque generated when the permanent magnet to which a square magnetization is applied is used. In this brushless motor A, preferably a skew magnetization is also applied to the rotor 1. Further, in case of driven by a sinusoidal-wave current, the skew angle is set to the angle in the range that has ±15% of the reference angle as an upper limit and a lower limit by a combination of a trapezoidal magnetization and a skew magnetization.

Abstract: The rotor body of an electrical machine has end windings supported by a plurality of circumferentially spaced rakes having tines between which the end windings pass in an arcuate pattern from and for return to an axial orientation within the rotor body. The rakes are supported on axial beams secured to the rotor body. An end disk is secured at the opposite ends of the beams and to a shield overlying the end windings. The rakes, beams and end disks provide axial end winding restraint. The end disk is weighted at selected circumferential locations to resist tendencies of the end windings to distort, e.g., toward an elliptical or non-concentric configuration about the rotor axis.

Abstract: The present invention provides a mechanical-electrical connector for interconnecting two separate circuits, as in two separate stator coil sections. The conductive end pieces of the stator coil sections to be interconnected are machined such that they can be inserted into the connector. The connector provides alternating conductive and dielectric layers to connect successive stator sections in an easy-to-assemble, non-permanent mechanism. A series of external jumper conductors provide interconnection between the internal conductive layers.

Abstract: A brush support jig for use during mounting of a brush assembly on a rotary electric machine having slip rings, to restrain the brushes against contact with the slip rings during the mounting operation, is of pin configuration having a linear portion formed of a linear portion made of a metal such as steel and a coating portion made of a material such as synthetic resin, having a lower degree of hardness than the slip rings, which covers the linear portion and thereby prevents damage to the slip rings in the event that that brush support jig comes into contact with the slip rings during the mounting operation.

Abstract: A housing of a motor includes a barrel having fins on an outer surface thereof and stands on a bottom of the outer surface for mounting the motor onto a predetermined plane horizontally. A rear lid is mounted at a rear end of the barrel and has an axle hole at a center thereof. A front lid is mounted at a front end of the barrel and ahs an axle hole at a center thereof. And, a front disk that has a diameter greater than that of the barrel is detachably fastened to the front lid. The front disk is provided with fastening holes for mounting the motor onto a predetermined plane vertically.

Abstract: A rise in temperature of magneto coils can be suppressed, thereby improving the electrical efficiency, service life and reliability thereof. A flywheel (3) has a cylindrical portion (4), and is rotatable about an axis of rotation A—A. A plurality of magnets (7) are mounted on an inner peripheral surface of the flywheel (3) so as to rotate therewith. A stator core (10) has a plurality of teeth (12) protruded outwardly in a diametral direction, and is disposed in opposition to the magnets (7). Conductive wires are wound around the teeth (12), respectively, to form magneto coils (11). The stator core (10) has a laminated core (15) formed of a plurality of magnetic sheet steel plates laminated one over another, and a pair of end plates (16, 17) disposed so as to sandwich opposite side surfaces of the laminated core (15). At least one of the pair of end plates (16, 17) is made of aluminum whose heat radiation is higher than the magnetic sheet steel plates.

Abstract: A stator fastening arrangement for a flat elevator motor may include a stator core, a winding, and a rotor fitted in conjunction with the stator. The stator may be fitted within a mounting part fastened to a motor body. A space provided between the mounting part and the stator may be filled with a thermally conductive filling material for conducting heat away from the stator to the mounting part. The filling material may be provided on one or more axial, outer circumferential surfaces of the stator and in contact with the mounting part so as to fasten the stator to the mounting part.