摘要:
An alternating current generator comprising a stator, and a claw pole rotor coaxially arranged in a stator hole and including a plurality of claw pole pairs uniformly distributed on a circumference thereof and having outer surfaces forming an annular gap with a stator surface defining the stator hole, each outer surface having, in a direction of claw pole rotor rotation, a front area and a rear edge and a plurality of surface portions extending between the front area and the rear edge transverse to the rotational plane of the claw pole rotor, with a surface portion located closer to the rear edge forming with a tangent extending to the outer surface at a point where the air gap is smallest, a first angle which is greater than a second angle formed with the tangent by a surface portion located farther away from the rear edge.
摘要:
An electric generator is improved in its cooling capacity at low speeds by driving the fan at a speed which is a multiple of the generator speed. This is effected by mounting the fan blade on a rotor of a three phase induction motor which is driven by a part of the three phase output of the generator.
摘要:
To reliably place a winding on a cylindrical pole core of a claw pole rotor structure for an alternator subjected to extremes in shock, vibration and oscillatory loadings, for example for use with motorcycle alternators, the pole core is deformed by knurling, grooving, rifling, or the like, preferably extending in cross direction, and a layer of mesh or net structure insulating fabric material, preferably a linen mesh, is placed over the pole core, the woven fabric mesh structure mechanically interlocking with the deformations and projections on the surface of the rotor; preferably, a plurality of wraps of the layer are provided, the field winding being wound directly over the uppermost wrap of the fabric layer in the form of a toroidal winding and, after assembly with the claw poles, the entire structure is impregnated with a suitable insulating compound, for example by vacuum impregnation, in accordance with standard dynamo electric machine construction.
摘要:
A refrigerant compressor for use in an automotive air conditioning refrigerating system is provided with an electromagnetic clutch and an AC electric generator assembled on the compressor. The electromagnetic clutch comprises a pulley rotatably mounted on the compressor housing to be driven by the engine of the car, a magnetic attracting surface, and a magnetic armature connected to a drive shaft of the compressor to be magnetically attracted to the magnetic attracting surface to selectively drive the compressor by the engine. The AC electric generator comprises a stator statically mounted on the compressor housing and a rotor mounted on the pulley. One of the stator and the rotor includes concentric magnetic pole pieces of permanent magnets or of electromagnets, and the other of the stator and rotor includes a coil member to which AC current is induced upon the rotation of the rotor together with the pulley. Electric power is obtained from the AC electric generator to compensate for the power consumption of the car battery in the use of the air conditioning refrigerating system.
摘要:
A method and apparatus for cooling a rotor assembly for an inside-out electric machine includes an annular rotor core defining a set of rotor posts, the core rotatable about an axis of rotation, a set of windings wound around the respective set of rotor posts, and a wedge disposed between adjacent sets of rotor windings.
摘要:
A vehicle alternating-current power generator includes a stator formed by winding an armature winding on a stator core and a rotor arranged on the radial inside of the stator. The rotor includes a field core having a boss part and a plurality of claw-shaped magnetic pole parts, a field winding that is wound on the outer peripheral side of the boss part, and a permanent magnet that is arranged between the circumferentially adjacent claw-shaped magnetic pole parts. A d-axis magnetic circuit formed by magnetomotive force of the field winding and at least part of first and second magnet magnetic circuits formed by magnetic force of the permanent magnet are shared. When an electrical load is connected to the rotor, the relationship between a permeance Prt of the d-axis magnetic circuit and a permeance Pst of a q-axis magnetic circuit is set to satisfy Pst>Prt.
摘要:
A vehicle alternating-current power generator includes a stator formed by winding an armature winding on a stator core and a rotor arranged on the radial inside of the stator. The rotor includes a field core having a boss part and a plurality of claw-shaped magnetic pole parts, a field winding that is wound on the outer peripheral side of the boss part, and a permanent magnet that is arranged between the circumferentially adjacent claw-shaped magnetic pole parts. A d-axis magnetic circuit formed by magnetomotive force of the field winding and at least part of first and second magnet magnetic circuits formed by magnetic force of the permanent magnet are shared. When an electrical load is connected to the rotor, the relationship between a permeance Prt of the d-axis magnetic circuit and a permeance Pst of a q-axis magnetic circuit is set to satisfy Pst>Prt.
摘要:
A rotor for an electrical machine that comprises two parallel magnet wheels, each of which comprises axial teeth so that each tooth on a wheel is situated in the space existing between two consecutive teeth on the other wheel, and that comprises magnetic elements, each arranged between two adjacent teeth and partly received in a groove produced in each of the opposite lateral faces of the two adjacent teeth. In one embodiment, each of the two adjacent teeth comprises one groove at a maximum, which emerges at the base of the first tooth.
摘要:
In a vehicular alternator, a stator is arranged to oppose a rotor in a housing. The stator includes a stator core, which forms a plurality of slots extending in an axial direction of the stator core, and a stator winding wound around the stator core. The stator winding includes electric conductors held in the slots. Each of the electric conductors has a circumferential width that is smaller than a circumferential distance between a first wall and a second wall defining the slot. The first wall and the second wall oppose each other in a circumferential direction. The electric conductors are alternately in contact with one of the first wall and the second wall.