摘要:
In a synchronous reluctance motor composed of a stator core and a rotor core, convex grooves are formed along q-axis in an outer circumferential surface of the rotor core. A rotor coil is wound in the convex grooves. Applying a direct current to the rotor coil generates a torque of a current magnetic flux Φi in addition to a reluctance torque. Each convex groove formed at the q-axis prevents decreasing the reluctance torque. The rotor coil has a cross sectional shape in a diametrical direction of the rotor coil so that the rotor coil has a maximum diametrical width at the q-axis position, and the diametrical width of the rotor coil is gradually decreased according to the distance from the q-axis position.
摘要:
A tandem type rotary generator has a rotary shaft, and two power generating sections disposed adjacent to each other along an axial direction. Each power generating section has a Lundell type rotor core fixed to the rotary shaft, a field coil wound on the rotor core, a stator core disposed on an outside of the rotor core opposite to the rotary shaft in a radial direction, and a stator coil wound on the stator core. A center of the field coil of each power generating section is positioned away from a center of the stator core of the power generating section in the axial direction toward the other power generating section. Two cooling fans cooling the power generating sections are disposed on both sides of the pair of rotor cores in the axial direction.
摘要:
A tandem rotary electric machine, to be applicable to various types of mobile bodies such as vehicles, is equipped with a primary rotary electric machine and a secondary rotary electric machine arranged in tandem mechanism. In the tandem rotary electric machine, heat energy generated by positive diodes and negative diodes forming one or more rectifier devices is dissipated to a stator core of the secondary rotary electric machine. The stator core of the secondary rotary electric machine acts as a heat sink through the housing. The stator core of the secondary rotary electric machine has a less frequency use, and a large size and a large weight than those of the primary rotary electric machine of high frequent and normal is used as a heat sink in order to prevent the temperature rise of the positive diode and the negative diode of the rectifier devices.
摘要:
In a tandem AC generator for a vehicle having dual armature core-Lundel type field core pairs placed in series, an intermediate ring as a cylindrical spacer is placed between the dual armature cores. One armature core, the intermediate ring, and the other armature core are pressed and tightly fastened to each other in the direction of a rotary shaft by front and rear housings by a through bolt. A circumference wall part of the front housing accommodates one armature core and the intermediate ring completely and further accommodates a part of an outer circumference surface of the other armature core. This simple construction of the tandem AC generator provides improved and superior vibration proof.
摘要:
A vehicular electric rotary machine of a heat pipe cooling type is disclosed including heat pipe means 14, 14A, 15, 15B, associated with a cooling fin 51, 52 and a rear end wall 122 of a rear frame 12, which have regions exposed to an exhaust passage 19 to be cooled by a cooling wind Wa for thereby radiating heat of a rectifier.
摘要:
A tandem type rotary generator has a rotary shaft, and two power generating sections disposed adjacent to each other along an axial direction. Each power generating section has a Lundell type rotor core fixed to the rotary shaft, a field coil wound on the rotor core, a stator core disposed on an outside of the rotor core opposite to the rotary shaft in a radial direction, and a stator coil wound on the stator core. A center of the field coil of each power generating section is positioned away from a center of the stator core of the power generating section in the axial direction toward the other power generating section. Two cooling fans cooling the power generating sections are disposed on both sides of the pair of rotor cores in the axial direction.
摘要:
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 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.
摘要:
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.
摘要:
An alternator for use in an automotive vehicle includes a circuit for detecting initiation of rotation of an engine. Upon detecting the initiation of rotation, excitation current supply to a field winding is started, and thereafter an alternator output is controlled by controlling the excitation current. A resistor is connected to one phase winding of an armature to obtain a voltage indicating initiation of rotation during a period in which no excitation current is supplied to the field winding, and a capacitor is connected to another phase winding to raise the indicating voltage level. Since the indicating voltage induced by a small amount of residual magnetism is increased to a sufficient level by the capacitor, the initiation of rotation can be accurately detected.
摘要:
An AC generator for a vehicle including a rotor with a fan, a stator disposed around the outer periphery of the rotor, and frame. The stator includes a laminated core having a plurality of slots, a plurality of electric conductors in the slots, and an insulator. There is a gap between the electric conductors and the insulator in a diametrical section of the slots, and an area ratio of the gap with respect to the sectional area of the slots is not more than 25%. A portion of the electric conductor positioned within the slot has a substantially rectangular shape along the shape of the slot.