Abstract: A change in torque produced by a motor having two rotors is reduced when the motor operates in a low-velocity and low-torque operational state. The motor has a first rotor and a second rotor, each of which has a permanent magnet, and an output shaft capable of rotating integrally with the first rotor. The second rotor can relatively rotate with respect to the first rotor by a driving force from a phase difference changing driving device, and the phase difference between the rotors (rotor phase difference) can be changed by the relative rotation of the second rotor with respect to the first rotor. When the values of the torque and the rotational velocity of the motor lie within a predetermined region in the proximity of 0, the phase difference changing driving device adjusts the rotor phase difference to a predetermined phase difference for which the strength of a composite field of the permanent magnets is lower than a maximum strength.

Abstract: A controller for a motor and a control method for a motor change an operating condition of each motor, considering difference in operating conditions, such as loss and temperature, thus making it possible to reduce a total loss in a plurality of motors. The controller includes a first motor operating condition calculator and a second motor operating condition calculator which calculate the estimated values of losses incurred when a first motor and a second motor are driven, and a DC voltage control unit which carries out, on a motor having a largest estimated value of loss, the processing for changing a supply voltage to change the voltage of DC power supplied to inverters by a DC/DC converter, thereby reducing the difference between a phase voltage, which is the resultant vector of the voltages across terminals of the motor, and a target voltage set on the basis of an output voltage of the DC/DC converter.

Abstract: This electric motor includes first permanent magnets secured integrally to an outer periphery side rotor and second permanent magnets secured integrally to an inner periphery side rotor. The first permanent magnets and the second permanent magnets are arranged so as to offset the relative torque produced between the outer periphery side rotor and the inner periphery side rotor based on the magnetic flux of the inner peripheral permanent magnets and the outer peripheral permanent magnets.

Abstract: In the field of stators including divided tooth-shaped iron cores and core back iron cores, a stator is provided in which the tooth-shaped iron cores and the core back iron cores can be easily connected to each other, and the tooth-shaped iron cores and the core back iron cores can be prevented from coming off in the radial direction. In the stator of the present invention, a yoke (24) is formed such that the circumferential width thereof is greater at a radial-outer region than at a radial-inner region, i.e.

Abstract: A controller for a motor permits efficient energization control according to an operating condition of a motor without depending on a number of revolutions of the motor when operating a motor having two rotors disposed around a rotating shaft. The controller includes a voltage-between-terminals increaser which carries out at least one of first processing for increasing a voltage between terminals in which a rotor phase difference is changed by an actuator in a direction for reducing the magnetic fluxes of fields of the motor, second processing for increasing a voltage between terminals in which an output voltage of a DC power source is increased by a DC/DC converter, and third processing for increasing a voltage between terminals in which d-axis current is increased in the case where the magnitude of a resultant vector of a command value of a d-axis voltage and a command value of a q-axis voltage in the motor exceeds the radius of a target voltage circle.

Abstract: A controller for a motor is capable of reducing the amount of energization required to operate a motor under a predetermined condition, the motor having two rotors disposed around a rotating shaft.

Abstract: A controller for a motor performs field weakening control by changing a phase difference between two rotors, which are concentrically disposed, and by accurately recognizing the phase difference.

Abstract: This electric motor is provided with an inner periphery side rotor, an outer periphery side rotor, and a rotating device that can change a relative phase between these rotors by rotating at least one of them about a rotational axis thereof. The rotating device is provided with a first member integrally and rotatably provided to the outer periphery side rotor, and a second member integrally fixed on an inside of the inner periphery side rotor which together with the first member defines a pressure chamber on the inside of the inner periphery side rotor. The rotating device changes a relative phase between the inner periphery side rotor and the outer periphery side rotor by supplying a hydraulic fluid to the pressure chamber. The rotating device is further provided with a linking passage that leaks the hydraulic fluid supplied to the pressure chamber to an outside of the pressure chamber.

Abstract: An electric motor driven by three-phase electric power includes armature windings that are connected in series, via an armature-winding connecting line, for each of a plurality of groups of three or N circumferentially-adjoining poles to thereby provide three-phase armature windings, wherein N is an arbitrary number equal to a multiple of three. The armature-winding connecting line connects in series the adjoining armature windings in such a way as to not substantially straddle a relatively great part of the outer periphery of any of the adjoining armature windings.

Abstract: This electric motor of the present invention is formed by an inner circumferential side rotor, an outer circumferential side rotor, and a planetary gear mechanism that are placed coaxially. The planetary gear mechanism is a single pinion type that includes a first planetary gear train and a second planetary gear train that are each single gear train. A first planetary carrier that supports the first planetary gear train is able to pivot around an axis of rotation, and a second planetary carrier that supports the second planetary gear train is fixed to a stator. The electric motor is further provided with an actuator that pivots the first planetary carrier by a predetermined pivot amount around the axis of rotation.

Abstract: A motor for a hybrid vehicle is provided in which miniaturization of the drive system and transmission system can be achieved while maintaining driving performance. A drive plate 23 which connects a crank shaft 2 of an engine 1 to a transmission 3, is provided with a rotor base section 3 orthogonal to an axis C of the crank shaft 2, and a plurality of magnets 21 having pole faces facing in a direction along the axis C, are mounted on the rotor base section 3 to form a rotor 30, and there is provided a stator 32 with a plurality of conductive coils 22 arranged so as to face the magnets 21 of the rotor 30 in a direction along the axis C.

Abstract: Coil windings are provided on each predetermined pair of adjoining tooth portions in a 8-like configuration by: winding a lead wire around one of the tooth portions a predetermined number of times, starting from a point adjacent to one side portion of a teeth-adjoining region; then winding the lead wire around the other tooth portion the same number of times, starting from a point adjacent to the other side portion of the teeth-adjoining region opposite from the one side portion; and terminating the winding of the lead wire at a point adjacent to the teeth-adjoining region.

Abstract: In the field of stators including divided tooth-shaped iron cores and core back iron cores, a stator is provided in which the tooth-shaped iron cores and the core back iron cores can be easily connected to each other, and the tooth-shaped iron cores and the core back iron cores can be prevented from coming off in the radial direction. In the stator of the present invention, a yoke (24) is formed such that the circumferential width thereof is greater at a radial-outer region than at a radial-inner region, i.e.

Abstract: An electric motor driven by three-phase electric power includes armature windings that are connected in series, via an armature-winding connecting line, for each of a plurality of groups of three or N circumferentially-adjoining poles to thereby provide three-phase armature windings, wherein N is an arbitrary number equal to a multiple of three. The armature-winding connecting line connects in series the adjoining armature windings in such a way as to not substantially straddle a relatively great part of the outer periphery of any of the adjoining armature windings.

Abstract: The stator includes core back iron cores disposed on outer circumferential sides between a plurality of teeth iron cores disposed at regular intervals of a predetermined distance in a predetermined circumferential direction. A stator winding is disposed on inner circumferential sides between the plurality of teeth iron cores. The stator winding is constituted by a plurality of wire bundles each of which is a bundle of a predetermined number of electric wires and which are connected in parallel with one another. The wire bundles are set so that the number of electric wires constituting a wire bundle located on the inner circumferential side between adjacent teeth iron cores is smaller than the number of electric wires constituting a wire bundle located on the outer circumferential side. Hence, the ratio (L/A) of the circumferential length L of each wire bundle to the sectional area A thereof is set at a value in a predetermined allowable range.

Abstract: A stator and a stator manufacturing method is provided in which a space factor can be improved, while reducing the number of components and simplifying the manufacturing process. A stator comprises a plurality of teeth cores 11 positioned at predetermined intervals on a predetermined circumference, a core back core 12 provided on a circumferential outside between adjacent teeth cores, and stator windings 13 which are wound around the teeth cores. An approximately U-shaped insulating sheet 14 is provided between adjacent teeth cores 11 with the ends of the sheet facing towards the circumferential outside, the insulating sheet 14 is provided between the teeth cores 11 and the stator windings 13, and the ends of the insulating sheet 14 are bent inward and occluded by an inner end surface of the core back core 12 which is inserted from the circumferential outside.

Abstract: A motor for a hybrid vehicle is provided in which miniaturization of the drive system and transmission system can be achieved while maintaining driving performance. A drive plate 23 which connects a crank shaft 2 of an engine 1 to a transmission 3, is provided with a rotor base section 3 orthogonal to an axis C of the crank shaft 2, and a plurality of magnets 21 having pole faces facing in a direction along the axis C, are mounted on the rotor base section 3 to form a rotor 30, and there is provided a stator 32 with a plurality of conductive coils 22 arranged so as to face the magnets 21 of the rotor 30 in a direction along the axis C.

Abstract: A constant detecting apparatus 15 comprising a detecting unit 26 and a calculating unit 27. The detecting unit 26 is structured comprising a rotation sensor 41, a torque sensor 42, a position sensor 43, a rotor temperature sensor 44, a winding temperature sensor 45, a phase voltage detector 46, and phase current detectors 47 and 47. The calculating unit 27 calculates the induced voltage constant Ke that changes depending on the motor temperature Tmag while the motor 11 is being driven based on each of the detected signals from the detecting unit 26, and at the same time, the d axis current Id and the q axis current Iq are calculated after elimination of the iron loss, and the d axis inductance Ld and the q axis inductance Lq in the actual operating state of the motor 11 are calculated.

Abstract: A stator and a stator manufacturing method is provided in which a space factor can be improved, while reducing the number of components and simplifying the manufacturing process. A stator comprises a plurality of teeth cores 11 positioned at predetermined intervals on a predetermined circumference, a core back core 12 provided on a circumferential outside between adjacent teeth cores, and stator windings 13 which are wound around the teeth cores. An approximately U-shaped insulating sheet 14 is provided between adjacent teeth cores 11 with the ends of the sheet facing towards the circumferential outside, the insulating sheet 14 is provided between the teeth cores 11 and the stator windings 13, and the ends of the insulating sheet 14 are bent inward and occluded by an inner end surface of the core back core 12 which is inserted from the circumferential outside.

Abstract: The stator includes core back iron cores disposed on outer circumferential sides between a plurality of teeth iron cores disposed at regular intervals of a predetermined distance in a predetermined circumferential direction. A stator winding is disposed on inner circumferential sides between the plurality of teeth iron cores. The stator winding is constituted by a plurality of wire bundles each of which is a bundle of a predetermined number of electric wires and which are connected in parallel with one another. The wire bundles are set so that the number of electric wires constituting a wire bundle located on the inner circumferential side between adjacent teeth iron cores is smaller than the number of electric wires constituting a wire bundle located on the outer circumferential side. Hence, the ratio (L/A) of the circumferential length L of each wire bundle to the sectional area A thereof is set at a value in a predetermined allowable range.