Abstract: A first exhaust turbo rotary machine is able to assist turbo supercharging by operating as a motor on power generated in a second rotary machine connected to a power axis of an engine. Also, when exhaust energy is large, the first turbo rotary machine operates as a generator so as to make the second rotary machine connected to the engine motive power axis operate electrically, thereby making it possible to add exhaust energy to the engine motive power axis. Consequently, that which results is a compound engine dynamo-electric machine that improves total efficiency of the engine by adding exhaust energy, which is otherwise discarded, to the engine motive power axis. This arrangement increases engine torque in a speed region where exhaust pressure is low by utilizing part of the engine's motive power as a supercharging driving force.

Abstract: A rotational speed sensor and a first F/V converter cooperatively obtain a voltage signal representing a rotational speed of an engine. A second F/V converter obtains a voltage signal representing a rotational speed of a generator-motor device. A rotational speed difference detector produces a difference between two voltage signals. When the difference exceeds a predetermined value, a voltage comparator produces a high-level signal to activate a warning circuit.

Abstract: A rotary electric machine is composed of an armature core, an armature winding, a rotor core disposed opposite said armature core, a rotary magnetic-flux source for supplying first magnetic flux to the rotor core, a frame for supporting the armature core and the rotor core and a stationary magnetic flux source, fixed to the frame, for supplying second magnetic flux to the rotor core in a direction to supplement the first magnetic flux.

Abstract: A rotary electric machine is composed of an armature core, an armature winding, a rotor core disposed opposite said armature core, a rotary magnetic-flux source for supplying first magnetic flux to the rotor core, a frame for supporting the armature core and the rotor core and a stationary magnetic flux source, fixed to the frame, for supplying second magnetic flux to the rotor core in a direction to supplement the first magnetic flux.

Abstract: An on-vehicle rotary electric apparatus, such as an on-vehicle generator, is provided. The apparatus comprises a stator having multi-phase windings, a rotor driven to rotate by either an on-vehicle motor or the running drive shaft of a vehicle, and a driving member for driving the field winding. The rotor has a field winding producing a magnetic field. The driving member drives the field winding by supplying the exciting current thereto and changing the exciting current so that the magnetic field rotates differently in a rotation speed from the rotor. Specifically, the driving member comprises a short-circuit winding wound around part of magnetic poles of the rotor and a current-supply unit for supplying, as the exciting current, a single-phase alternating current to the field winding. The short-circuit winding produces a magnetic field delayed in phase by 90 degrees compared to the magnetic field produced by the rotor.

Abstract: A rotary electric machine such as a vehicle AC generator includes a multi-phase armature winding, a stator core, a rotor including a magnetic field coil and a plurality of poles, an unbalance detecting coil, and a comparator circuit for comparing an output signal of the unbalance detecting circuit with a threshold value. If the AC generator fails, a voltage induced in the unbalanced detecting coil becomes larger than the threshold value, and an alarm is be outputted.

Abstract: A vehicle alternator includes a permanent magnet rotor, a stator having armature coils, and a rectifier circuit. In the rectifier circuit, schottky barrier diodes and FETs are connected in series so that the forward directions of the schottky barrier diodes and parasitic diodes of the MOSFETs are opposite. The schottky barrier diodes are connected between the MOSFETs and the armature coils.

Abstract: A flat rotary electric machine to be mounted in a vehicle engine includes an annular stator core with a plurality of teeth and an armature winding and a field unit including a gutter-like field core having a pair of coaxial cylindrical core members. A plurality of permanent magnets are disposed on the cylindrical core members and an annular field coil disposed between the cylindrical core members. Each of the cylindrical core members has a plurality of magnet-conductive salient magnetic poles disposed between the permanent magnets, the permanent magnets are magnetized so that all the magnetic flux thereof can cross the stator through the teeth in the same direction.

Abstract: An AC motor-generator includes a rotor made up of a first inductor core and a second inductor core arrayed in an axial direction of a rotary shaft. A plurality of permanent magnets are arrayed at an interval of 2&pgr; in electrical angle of an armature away from each other in the periphery of each of the first and second inductor cores. Each permanent magnet is magnetized in a radius direction of the first and second inductor cores so as to be opposed to a magnetomotive force produced by a field winding, thereby resulting in quick disappearance of the magnetic flux of the field upon disappearance of the magnetomotive force from the field winding.

Abstract: A vehicle AC generator for charging a battery includes a rotor having a permanent magnet, a stator having an armature winding, a rectifier and a short-circuit unit. The short-circuit unit intermittently short-circuits the armature winding. The armature winding is set to generates a no-load voltage that is lower than a terminal voltage of the battery when the armature winding is not connected to loads. The short-circuit unit intermittently short-circuits the armature winding to generates a fly back voltage that is higher than the terminal voltage of the battery when the armature winding is connected to the loads. Therefore, the output voltage of the permanent magnet type generator can be regulated without significant energy loss.

Abstract: A rotor of a vehicle AC generator is comprised of a rotor core and a field coil. The rotor core is comprised of a boss portion and a plurality of claw-pole portions bending to respectively extend in axial directions from outer circumferences of the boss portion to interleave with each other to form a zigzag space between the claw-pole portions. The field coil comprises a main coil portion disposed on the boss portion, a sub-coil portion disposed between the main coil and the claw-pole portions and a flywheel diode connected in parallel with the main coil. When the field current is cut off, current circulating through the main coil is increased because the energy accumulated in the sub-coil is discharged.

Abstract: A rotary electric machine for a vehicle has a rotor with a rotor shaft, a pair of rotor cores, a field winding and an annular core made of a stack of core sheets. The rotor core has a boss, a disc portion and a cylindrical part. The cylindrical part is connected with the disc portion and is continuous along the rotor shaft. The cylindrical part is formed with projections and recesses which are disposed alternately in a circumferential direction on the outer periphery thereof. Permanent magnets may be disposed in the recesses. The annular core is connected with outer peripheries of the projections of the cylindrical parts. By adopting the cylindrical parts and the annular core, diameter of the boss is enlarged.

Abstract: An object of the present invention is to improve, without greatly raising a production cost, both a starting-up characteristics during motor operation and power generation characteristics during dynamo operation. The AC dynamotor of the present invention comprises: a rotor with field magnet poles; an armature with three-phase windings provided in slots of the armature iron core; and AC/DC power converter. The induced electromotive voltages during the dynamo operation in the three-phase windings are rectified and outputted by the AC/DC power converter. The DC voltage applied from outside to the AC/DC power converter is converted into AC voltage and applied to the three-phase windings. A two-phase excitation at a lower rotation range including a starting-up timing during the motor operation is executed by a control of a vector control gate controller. On the other hand, a three-phase excitation is executed during the dynamo operation.

Abstract: A rotary electric machine is composed of an armature core, an armature winding, a rotor core disposed opposite said armature core, a rotary magnetic-flux source for supplying first magnetic flux to the rotor core, a frame for supporting the armature core and the rotor core and a stationary magnetic flux source, fixed to the frame, for supplying second magnetic flux to the rotor core in a direction to supplement the first magnetic flux.

Abstract: In an alternating current generator, a rotor is provided radially inside a stator core. A rotor core has a cylindrical boss press-fit around a rotor shaft, disc portions extending from an outer periphery of the boss in a radial direction, and claw pieces in connecting with the disc portions radially outside the boss. A field winding is provided between the boss and claw pieces. An annular core is provided on an outer periphery of the claw pieces. The annular core is made of a stack of core sheets and has slits formed in the radial direction. Iron loss is decreased and leaks of magnetic fluxes in the annular core are suppressed by the slits.

Abstract: A first exhaust turbo rotary machine is able to assist turbo supercharging by operating as a motor on power generated in a second rotary machine connected to a power axis of an engine. Also, when exhaust energy is large, the first turbo rotary machine operates as a generator so as to make the second rotary machine connected to the engine motive power axis operate electrically, thereby making it possible to add exhaust energy to the engine motive power axis. Consequently, that which results is a compound engine dynamo-electric machine that improves total efficiency of the engine by adding exhaust energy, which is otherwise discarded, to the engine motive power axis. This arrangement increases engine torque in a speed region where exhaust pressure is low by utilizing part of the engine's motive power as a supercharging driving force.

Abstract: A rotational speed sensor and a first F/V converter cooperatively obtain a voltage signal representing a rotational speed of an engine. A second F/V converter obtains a voltage signal representing a rotational speed of a generator-motor device. A rotational speed difference detector produces a difference between two voltage signals. When the difference exceeds a predetermined value, a voltage comparator produces a high-level signal to activate a warning circuit.

Abstract: An electric machine selectively operates as a generator mode or a motor mode. The electric machine includes a stator core, a multi-phase armature winding, a field coil, a moving core having a plurality of salient poles so as to move relative to the stator core to cross the magnetic field. Field current is supplied to the field coil differently according to operation mode. A portion of the armature winding is short-circuited to form an additional magnetic field that has a phase different from the magnetic field of the field coil. Therefore, the rotary core moves relative to the stator core when the operation mode is in the motor mode.

Abstract: A brushless rotary electric machine includes a stator having an annular armature core with first radial teeth at the outer periphery thereof and second radial teeth at the inner periphery thereof and an armature winding wound between the teeth, a rotor having a pair of first and second rotary cores disposed tandem in the axial direction thereof, and a field coil. Each of the first and second rotary cores has a pair of coaxial outer and inner cylindrical pole members respectively facing the first and second radial teeth, a center core and a disk member magnetically connecting the pair of coaxial cylindrical pole members and the center core. The stator is accommodated by a first space defined by the outer and inner cylindrical members of the pair of first and second rotary cores. The field coil is accommodated by a second space defined by the inner cylindrical pole member and the center core of the first and second rotary cores.

Abstract: An on-vehicle rotary electric apparatus, such as an on-vehicle generator, is provided. The apparatus comprises a stator having multiphase windings, a rotor driven to rotate by either an on-vehicle motor or the running drive shaft of a vehicle, and a driving member for driving the field winding. The rotor has a field winding producing a magnetic field. The driving member drives the field winding by supplying the exciting current thereto and changing the exciting current so that the magnetic field rotates differently in a rotation speed from the rotor. Specifically, the driving member comprises a short-circuit winding wound around part of magnetic poles of the rotor and a current-supply unit for supplying, as the exciting current, a single-phase alternating current to the field winding. The short-circuit winding produces a magnetic field delayed in phase by 90 degrees compared to the magnetic field produced by the rotor.