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 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 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 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:
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 vehicle rotary electric machine includes a rotor having a plurality of claw-shaped pole pieces, a cooling fan, a stator core, a stator winding and a frame. A coil-end-gap is formed along the axial end of the stator core between outside portions of the stator winding extending from each pair of adjacent slots, and a cylindrical wall member is disposed between the frame and coil-ends of the stator winding.
Abstract:
It is an object of this invention to provide a compact high-power alternator for a vehicle. It is another object of this invention to provide a low-noise alternator for a vehicle which outputs an increased power during operation at a low rotational speed. An alternator 1 for a vehicle includes a stator 2 having inner circumferential surfaces formed with many slots having open ends 35. Teeth ends of the stator between the slots have magnetic-flux collecting projections 36 extending in circumferential directions. The magnetic-flux collecting projections 36 are previously formed by, for example, a pressing process during a stage in which they are thin steel plates. An electric conductor forming a winding 33 has a diameter greater than a width of inner openings of the slots. A piece of the electric conductor extends into a first slot from a first side of the iron core 32, and extends out of the first slot to a second side of the iron core 32 before extending into a second slot, which is distant from the first slot by an electric angle of 180°, from the second side of the iron core 32 and extending out of the second slot to the first side of the iron core 32. The winding 33 has a recurrence of such pieces which forms one phase. The winding 33 has, for example, three phases separated by electric angles of 120°.
Abstract:
A stator of a vehicle AC generator includes a stator core having a plurality of slots and a stator winding having a plurality of circumferentially aligned U-shaped conductor segments. One group of the U-shaped conductor segments have first turn portions and another group of U-shaped conductor segments have second turn portions enclosed by the first turn portions. The first turn portions and the second turn portions are shifted from one another in the circumferential direction to provide a distance therebetween for insulation as well as cooling air.
Abstract:
In a stator winding of an AC generator for a vehicle, a plurality of sets of first and second conductor segments are disposed in the slots of a stator and connected to form the stator winding. Each of the first conductor segments has a turn portion having a large radius of curvature disposed at an axial end of the stator core, and each of the second conductor segments has a turn portion having a small radius of curvature disposed at an axial end. The second conductor segments have stronger insulation coating than the first conductor segments to improve insulation performance.
Abstract:
A stator of a vehicle AC generator includes a stator core having a plurality of slots and a plurality of phase-windings formed of a plurality of conductor members inserted in said plurality of slots. The stator winding has first and second coil-end groups formed of portions of the conductor members respectively extending from the slots to opposite ends of the stator core. Each of the phase-windings has a lead-end which partially covered with an insulation member and extends along the first coil-end group to be connected to one another. The insulation member is bonded to the first coil-end group.