Abstract: A stator for an electric rotating machine includes a hollow cylindrical stator core having a plurality of slots and a stator coil formed by joining a plurality of electric wires mounted on the stator core. For each joined pair of the electric wires, one of the electric wires has an end portion led out from the radially inner periphery of one of the slots of the stator core while the other electric wire has an end portion led out from the radially outer periphery of another one of the slots of the stator core; the end portions are welded together to form a weld therebetween. Part of the welds formed between the end portions of the joined pairs of the electric wires are located on the radially inner periphery of the stator coil while the remaining welds are located on the radially outer periphery of the stator coil.

Abstract: A stator includes a stator core and a multi-phase stator coil comprised of a plurality of electric wires. Each of the electric wires has first, second, . . . , nth in-slot portions and first, second, . . . , (n?1)th turn portions, where n is an integer not less than 4. The first in-slot portions of the electric wires are located most radially outward and the nth in-slot portions are located most radially inward in the slots of the stator core. Each of the electric wires also has a first end portion positioned on the first in-slot portion side and a second end portion positioned on the nth in-slot portion side. Each of phase windings of the stator coil is formed of at least two of the electric wires. The first end portion of one of the two electric wires is connected to the second end portion of the other electric wire.

Abstract: A stator includes a stator core and a stator coil comprised of a plurality of electric wires. Each of the electric wires has, at least, first, second, and third in-slot portions and first and second turn portions. The first to third in-slot portions are respectively received in three different slots of the stator core. The first turn portion is located on one axial side of the stator core outside of the slots to connect the first and second in-slot portions. The second turn portion is located on the other axial side of the stator core outside of the slots to connect the second and third in-slot portions. For each of the electric wires, the radial distances of the first to third in-slot portions from the axis of the stator core successively decrease. All of the electric wires are offset from one another in the circumferential direction of the stator core.

Abstract: A stator includes a hollow cylindrical stator core and a stator coil made up of wave-shaped electric wires. Each of the electric wires has in-slot portions, which are received in slots of the stator core, and turn portions that are located outside of the slots to connect the in-slot portions. The stator coil includes first crank-shaped portions and second crank-shaped portions. Each of the first and second crank-shaped portions is provided, in one of the electric wires, at the center of an apex part of one of the turn portions and is radially bent to shift the radial position of the electric wire. The amount of radial position shift made by each of the second crank-shaped portions is less than that made by each of the first crank-shaped portions. The second crank-shaped portions are located at a plurality of places in the circumferential direction of the stator core.

Abstract: A stator for an electric rotating machine includes a hollow cylindrical stator core and a stator coil made up of a plurality of wave-shaped electric wires. Each of the electric wires has a plurality of in-slot portions, each of which is received in one of slots of the stator core, and a plurality of turn portions each of which is located outside of the slots of the stator core to connect one adjacent pair of the in-slot portions of the electric wire. The stator coil includes a plurality of radial position shift portions each of which is provided, in one of the electric wires, in one of the turn portions of the electric wire between an apex part of the turn portion and one of the in-slot portions of the electric wire adjoining the turn portion and is radially bent to shift the radial position of the electric wire.

Abstract: An alternator for a vehicle has a rotor with a field wiring, a stator with a three-phase stator wiring, a regulator, and a rectifier. The regulator and rectifier are disposed away from each other with the rotor between. An alternating current is generated in the stator wiring in response to a rotation of the rotor and a field current received in the field wiring. The rectifier converts the alternating current into a direct current and outputs the direct current as an electrical energy generated in the alternator. The regulator regulates a value of the filed current to control the electrical energy. The rectifier acts as a heat generating member, but heat generated in the rectifier is hardly transmitted to the regulator disposed away from the rectifier.

Abstract: A vehicle alternator for generating electric power is driven by an engine mounted on a vehicle driven through a driving belt. The alternator has a pulley part joined to and directly receiving a driving force from the engine through the driving belt, a field magnet part located in separation from the pulley part, a rotation speed changing part placed between the pulley part and the field magnet part. The rotation speed changing part converts the number of revolutions between the pulley part and the field magnet part. The rotation speed changing part decreases a speed changing ratio “S” according to increasing of the number of revolutions of the engine, where the speed changing ratio “S” is obtained by dividing the number of revolutions of the field magnet part by the number of revolutions of the pulley part.

Abstract: A rotary electric machine for vehicles is provided, which includes a rotor, a stator disposed opposed to the rotor, a frame made of aluminum and supporting the rotor and the stator, and a rectifier secured to an outer end face of the frame and having low-loss elements as rectifying elements. A heat insulator is disposed between the rectifier and the frame. With this configuration, deterioration can be prevented in the overall cooling properties, while at the same time the cooling properties of the rectifier can be enhanced.

Abstract: A rolling bearing is adapted for an auxiliary device driven by an internal combustion engine via a belt. The rolling bearing comprises an inner race, an outer race, and a plurality of rolling elements disposed between the inner race and the outer race for rolling capabilities. A substantially half of a tolerance value of a clearance in a radial direction of the rolling bearing falls in a negative value, under a condition where the rolling bearing is mounted in the auxiliary device.

Abstract: A method of designing a roller bearing is disclosed upon clarifying mechanisms of damage patterns in respect of two kinds of brinelling, involved in the bearing, wherein white-banded flaking (brittle flaking) is a plastic instability phenomenon appearing under high-speed deformation accompanied by adiabatic shear deformation status with the resultant occurrence of adiabatic shear band (also called white band) inside material of the bearing. This enables all of the damage patterns to be determined upon making comparison between shear strain and shear strain rate, occurring inside the bearing, and discriminated values.

Abstract: An automotive alternator includes a rotary shaft, a pulley, a stator, a rotor, and a magnetic fluctuation suppressor. The pulley is provided on the rotary shaft to transmit rotating power from an engine to the rotary shaft. The stator includes a stator winding. The rotor is mounted on the rotary shaft and configured to provide a first rotating magnetic field to the stator. The magnetic fluctuation suppressor includes a magnetic body and a magnetic source. The magnetic body is mounted on the rotary shaft such that the magnetic body is rotatable along with the rotary shaft at a rotational speed different from that of the rotary shaft. The magnetic source is fixed to the rotary shaft so as to create a second rotating magnetic field which induces a magnetic attraction between the magnetic body and the magnetic source, by which fluctuations in rotational movement of the rotary shaft are suppressed.

Abstract: An on-vehicle alternator is disclosed having a rotor driven by an engine via a belt, a stator having armature windings to generate electromotive forces in response to rotating magnetic fluxes, a housing on which the stator is fixedly secured, a pulley fixedly supported on the rotor to transmit a belt drive force to the rotor, and bearings rotatably supporting the rotor and fixedly supported on the housing. The power generator also includes a bush, formed of a metallic member, which is accommodated in the housing. The bearing, disposed in an area closer to the pulley, is comprised of an inner race, an outer race and rolling elements, all of which are formed of metallic members, with the outer race being press fitted to the bush with a certain degree of interference.

Abstract: A rolling bearing assembly according to the present invention includes an inner ring, an outer ring, a plurality of rolling elements interposed between the inner and outer rings, and a magnet provided to cause magnetic attraction between the rolling elements and at least one of the inner and outer rings. With the magnetic attraction, it is possible to avoid any collision between the rolling elements and the inner and outer rings, thereby preventing brittle flaking from occurring in the rolling bearing assembly.

Abstract: A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC/DC conversion. The machine operates as a motor and a generator. The machine comprises a multi-phase windings, switching elements forming a rectifying device, and a controller for controlling a current path of the multi-phase windings by switching the switching elements on and off to perform two modes of operation. The switching elements are switched such that one end of each windings is connected to either a high electrical potential end or a low electrical potential end of the rectifying device and the other ends of the windings connected together to be the same electrical potential are connected to either the high electrical potential end or the low electrical potential end in the rectifying device.

Abstract: A liquid ejection apparatus includes an element that is charged and discharged so as to perform an operation to eject a liquid, an analog signal generating unit that generates an analog signal having a voltage change pattern for determining the operation of the element, a charging transistor that amplifies a current of the analog signal while the element is charged, and pushes the amplified current toward the element, the charging transistor having a current source terminal, to which a current source is connected, and a push terminal for pushing the current, and a current source connector that selects at least one current source from among a plurality of current sources according to a voltage of the analog signal, and connects the selected current source to the current source terminal.

Abstract: A drive signal generating apparatus is provided with an analog signal converting section, a current amplification section, and a power source generating section. The analog signal converting section converts digital data to an analog signal. The current amplification section is provided with a current amplification transistor and generates a drive signal by amplifying a current of the analog signal using the current amplification transistor. The power source generating section is a power source having a voltage determined based on the digital data and generates a power source to be supplied to the current amplification transistor.

Abstract: A head driving device of a liquid ejecting apparatus includes a pressure generating element, a bias voltage applying unit which applies a bias voltage to the pressure generating element, a driving voltage generating unit which generates and outputs a driving voltage to the pressure generating element for ejecting a liquid droplet from a nozzle of a liquid ejecting head, and a cutoff unit which cuts off the bias voltage applied to the pressure generating element based on an outputting of a drive stopping signal.

Abstract: The present invention provides a heat source unit capable of being used in either an air conditioner for switchable cooling and heating operation or an air conditioner for simultaneous cooling and heating operation. An air conditioner principally includes one heat source unit, a plurality of utilization units, and a connecting unit provided for each utilization unit. The heat source unit uses water as the heat source, and principally includes a compressing means, a main heat exchanger, a first switching means, a main refrigerant switching means, an auxiliary heat exchanger connected in parallel with the main heat exchanger, a second switching means, an auxiliary refrigerant switching means, and a liquid receiver. The auxiliary heat exchanger is capable of switching between functioning as an evaporator and a condenser, by the second switching means.

Abstract: A method of calculating torque of a Lundell-type synchronous generator is disclosed in which only power generation output current and a rotational speed are input for calculation of the amount of electric power and the amount of losses for thereby enabling calculation of power generating torque, based on a sum of the amount of electric power and the amount of losses, which is generated as an output. The present method establishes formulae enabling calculation based on only output current and the rotational speed, enabling a minimal number of inputs to shorten a calculation time interval.

Abstract: The present invention provides a variable optical dispersion compensating module comprised of (a) an optical dispersion compensating unit having an input optical switch, an optical dispersion compensating fiber, connected to the optical switch, having a predetermined optical dispersion amount, a bypass path for bypassing the optical dispersion compensating fiber, and an output optical switch connected to the optical dispersion compensating fiber and the bypass path, (b) an optical dispersion compensating circuit with at least one of the unit connected in series, and (c) an optical attenuator provided, in the direction of an optical path, after the input optical switch or before the output optical switch of the optical dispersion compensating circuit.