Abstract: A soft switching system DC-DC converter includes a switching element, a transformer or a reactor, and a controller configured to control a switching operation of the switching element; and carries out the switching operation of the switching element in a state that a voltage or a current to be applied to the switching element is zero. In a case where a required output value of the DC-DC converter is lower than the minimum output over which soft switching is established, the controller controls the operation of the switching element so that an operation period in which an output of the DC-DC converter becomes the minimum output or higher and a stop period in which the output becomes zero are alternately repeated.

Abstract: A power supply device has a first power supply capable of storing and discharging electric power, a second power supply connected in series to the first power supply and capable of storing and discharging the electric power, an isolated DC-DC converter including a primary side terminal to which the first power supply is connected, and a secondary side terminal to which the second power supply is connected, and a power supply control unit that controls a voltage of the second power supply using the isolated DC-DC converter. A direct-current voltage outputted from the first power supply and the second power supply connected in series is inputted to a first inverter, converted into an alternating-current voltage by the first inverter, and then supplied to a vehicle drive motor.

Abstract: A soft switching system DC-DC converter includes a switching element, a transformer or a reactor, and a controller configured to control a switching operation of the switching element; and carries out the switching operation of the switching element in a state that a voltage or a current to be applied to the switching element is zero. In a case where a required output value of the DC-DC converter is lower than the minimum output over which soft switching is established, the controller controls the operation of the switching element so that an operation period in which an output of the DC-DC converter becomes the minimum output or higher and a stop period in which the output becomes zero are alternately repeated.

Abstract: A power supply device has a first power supply capable of storing and discharging electric power, a second power supply connected in series to the first power supply and capable of storing and discharging the electric power, an isolated DC-DC converter including a primary side terminal to which the first power supply is connected, and a secondary side terminal to which the second power supply is connected, and a power supply control unit that controls a voltage of the second power supply using the isolated DC-DC converter. A direct-current voltage outputted from the first power supply and the second power supply connected in series is inputted to a first inverter, converted into an alternating-current voltage by the first inverter, and then supplied to a vehicle drive motor.

Abstract: A rotary electric machine rotor is provided with a rotor shaft, a rotor core, and a group of permanent magnets. The rotor core includes a group of flux barriers arranged at intervals. At least one of the flux barriers includes at least one bridge joining an inner edge and an outer edge of that flux barriers. The permanent magnets are arranged at the rotor core between the flux barriers as viewed in the cross sectional plane.

Abstract: A motor/generator is basically provided with a stator, a first rotor member and a magnetic resistance changing mechanism. The stator has a plurality of coils configured and arranged to be energized with a composite electrical current to form first and second magnetic fields. The first rotor member is configured and arranged to be rotated with respect to the stator using the first magnetic field. The magnetic resistance changing mechanism is configured and arranged to change a magnetic resistance between the stator and the first rotor member using the second magnetic field.

Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.

Abstract: An axial-gap motor/generator that has a stator equipped with a plurality of polyphase coils from which are led output lead wires, wherein wire connectors 16 for each of coil 12 are divided and arranged on the front side and rear side of the side surface of stator 10.

Abstract: A motor/generator includes a rotor member, a shorting member and a stator. The rotor member has a plurality of permanent magnets. The shorting member is configured and arranged to selectively establish a short-circuit in magnetic flux of the permanent magnets to switch between a normal state in which the magnetic flux is not shorted and a shorted state in which the magnetic flux is shorted. The stator has a plurality of coils configured and arranged to be energized with a composite electrical current including first and second current components. The stator is further configured and arranged to form a first magnetic circuit between the coils and the permanent magnets with the first current component to drive the rotor member and to form a second magnetic circuit between the coils and the shorting member with the second current component to selectively switch between the normal state and the shorted state.

Abstract: In a dynamo-electric machine having two rotors, at least one of the rotors is constructed to have a first magnetic path that extends in a circumferential direction of the rotor, at least one of the rotors is constructed to have a second magnetic path that extends in a radial direction of the rotor, and at least one of the rotors is of an interior permanent magnetic type (IPM) and includes an inside yoke that faces an axial end of the stator. A magnetic resistance of a part of the inside yoke by which the same poles of the permanent magnets of the corresponding rotor are magnetically connected is lower than that of another part of the inside yoke by which the different poles of the permanent magnets of the corresponding rotor are magnetically connected.

Abstract: The disclosure is directed to an electrical motor that includes a rotor and stator with improved cooling of the motor. The improved cooling is due to a convenient coil connecting structure of the stator. Outer and inner peripheral connectors connect the coil wound ends at the outer and inner peripheral sides of the stator, respectively. From this structure, heat sources, such as the connectors, are distributed to both the outer peripheral and inner peripheral sides of the stator core. In this manner, the motor may more effectively be cooled through the distributed heat sources.

Abstract: In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.

Abstract: A motor/generator is basically provided with a stator, a first rotor member and a magnetic resistance changing mechanism. The stator has a plurality of coils configured and arranged to be energized with a composite electrical current to form first and second magnetic fields. The first rotor member is configured and arranged to be rotated with respect to the stator using the first magnetic field. The magnetic resistance changing mechanism is configured and arranged to change a magnetic resistance between the stator and the first rotor member using the second magnetic field.

Abstract: A motor/generator includes a rotor member, a shorting member and a stator. The rotor member has a plurality of permanent magnets. The shorting member is configured and arranged to selectively establish a short-circuit in magnetic flux of the permanent magnets to switch between a normal state in which the magnetic flux is not shorted and a shorted state in which the magnetic flux is shorted. The stator has a plurality of coils configured and arranged to be energized with a composite electrical current including first and second current components. The stator is further configured and arranged to form a first magnetic circuit between the coils and the permanent magnets with the first current component to drive the rotor member and to form a second magnetic circuit between the coils and the shorting member with the second current component to selectively switch between the normal state and the shorted state.

Abstract: In a dynamo-electric machine having two rotors, at least one of the rotors is constructed to have a first magnetic path that extends in a circumferential direction of the rotor, at least one of the rotors is constructed to have a second magnetic path that extends in a radial direction of the rotor, and at least one of the rotors is of an interior permanent magnetic type (IPM) and includes an inside yoke that faces an axial end of the stator. A magnetic resistance of a part of the inside yoke by which the same poles of the permanent magnets of the corresponding rotor are magnetically connected is lower than that of another part of the inside yoke by which the different poles of the permanent magnets of the corresponding rotor are magnetically connected.

Abstract: A power roller supporting structure for a toroidal continuously variable transmission, including a moveable disk, a stationary disk, the disks being rotatable about a first axis, power rollers disposed between the moveable and stationary disks and rotatable about a second axis and pivotally moveable about a third axis extending perpendicular to the second axis upon rotation of the moveable and stationary disks, the power rollers having a low speed ratio position where a reduced speed ratio between rotational speeds of the disks is obtained and a high speed ratio position where an increased speed ratio therebetween is obtained, and an arrangement for allowing the power rollers to move closer to the first axis along the second axis when the power rollers are placed in the low speed ratio position than when the power rollers are placed in the high speed ratio position.

Abstract: An axial-gap motor/generator that has a stator equipped with a plurality of polyphase coils from which are led output lead wires, wherein wire connectors 16 for each of coil 12 are divided and arranged on the front side and rear side of the side surface of stator 10.

Abstract: The disclosure is directed to an electrical motor that includes a rotor and stator with improved cooling of the motor. The improved cooling is due to a convenient coil connecting structure of the stator. Outer and inner peripheral connectors connect the coil wound ends at the outer and inner peripheral sides of the stator, respectively. From this structure, heat sources, such as the connectors, are distributed to both the outer peripheral and inner peripheral sides of the stator core. In this manner, the motor may more effectively be cooled through the distributed heat sources.

Abstract: A power roller supporting structure for a toroidal continuously variable transmission, including a moveable disk, a stationary disk, the disks being rotatable about a first axis, power rollers disposed between the moveable and stationary disks and rotatable about a second axis and pivotally moveable about a third axis extending perpendicular to the second axis upon rotation of the moveable and stationary disks, the power rollers having a low speed ratio position where a reduced speed ratio between rotational speeds of the disks is obtained and a high speed ratio position where an increased speed ratio therebetween is obtained, and an arrangement for allowing the power rollers to move closer to the first axis along the second axis when the power rollers are placed in the low speed ratio position than when the power rollers are placed in the high speed ratio position.

Abstract: A continuously variable transmission (2) has a first helical gear (204A) for its rotation output. The fixed speed ratio transmission (3) has a second helical gear (203B) for its rotation output. The third helical gear (207) rotates according to the difference of the rotation speeds of the first helical gear (204A) and second helical gear (203B). These helical gears rotate on a same rotation shaft (204). One of the three helical gears positioned between the other two helical gears applies a bending moment on the rotation shaft (204) due to a radial force given by a gear meshed therewith. The direction of the tooth trace of the other two helical gears is set so that at least one of them produces a bending moment in an opposite direction to the first bending moment.