Abstract:
A synchronous machine formed as a generator for a motor vehicle has a stator, a rotor, an excitation system composed of a plurality of electrically excited individual poles provided in the stator and the rotor and formed as claw poles excited by a joint excitation coil, and a stray field compensation device arranged in free spaces between the claw poles, the stray field compensation device being formed as an additional winding through which current flows and which surrounds the claw poles so that an axial current direction changes from one free space to another free space and a current to neighboring claw poles produces an additional flux which supports a main flux and counteracts a stray flux.
Abstract:
A claw pole generator has a drive shaft, two pole wheel halves arranged on the drive shaft and each having a disk-shaped plate and claw shaped magnet poles spaced from one another in a peripheral direction and having magnet pole tips, the magnet poles of one pole wheel half being inserted in intermediate spaces of the magnet poles of the other of the pole wheel halves, permanent magnet parts provided for a dissipation flux compensation and arranged in intermediate spaces of the plate, the magnet poles extending in a predetermined direction, and a mounting device connecting the magnet pole tips with a neighboring one of the plates, the magnet poles extending toward an outer edge of a neighboring one of the plates, the mounting device having vanes operating as an ventilation element.
Abstract:
In a threephase generator, it is suggested, for the purpose of supporting the stator plates, to provide the latter with a decoupling ring which is held securely at the stator plates on the one hand and, on the other hand, by means of clamping in a fit of the housing parts of the threephase generator on both sides. The decoupling ring can consist of two decoupling ring portions which embrace the stator plates and, at a distance from the latter, form a common clamping place for the end shields of the housing; or a radial ring can be formed, which is securely connected along the circumference alternately with the surface of the stator plates on the one hand, and, on the other hand, with certain clamping places in the housing by means of coupling segments. The half-shells of the decoupling ring and the radial ring can be formed directly by the laminations of the stator plates by means of a corresponding shaping.
Abstract:
A stator of a three-phase generator, having a multi-strand stator winding in which each of the m phase windings (19) is comprised of a group (22), which has a first coil (24) with coil sides (28, 29), which are contained in grooves (16) that are spaced apart from one another by 180° electrically and the first coil (24) has a particular number of turns (zw), has a second coil (27) with coil sides (29, 30), which are contained in grooves (16) that are spaced apart from one another by 180° electrically and the second coil (27) has a particular number of turns (zw); the second coil (27) is offset from the first coil (24) in a first direction by 180°/m electrically, and in accordance with the predetermined number of pole pairs, a corresponding number of groups (22) that are offset from one another by 360° electrically are arranged one after another in the stator.
Abstract translation:一种三相发电机的定子,具有多股定子绕组,其中每个m相绕组(19)由一组(22)组成,该组具有带有线圈侧(28)的第一线圈(24) 29),其包含在彼此间隔开180°的槽(16)中,并且第一线圈(24)具有特定的匝数(z≠w),具有第二 线圈(27)具有线圈侧(29,30),其包含在彼此间隔开180°的槽(16)中,并且第二线圈(27)具有特定的匝数(z < w SUB>); 第二线圈(27)在第一方向上以第一方向偏移180°/ m,并且根据预定数量的极对,相应数量的组(22)从一个偏移 在定子中一个接一个地布置另一个360°电。
Abstract:
The electrical machine, in particular a three-phase generator, has a stator (21) secured in a housing (10) and a claw pole rotor (23) which is secured on a shaft (13) and has an exciter winding (28). Between the claw pole rotor and a bearing plate (17) that closes off the housing, there is an electrical repeater (29) for exciting the exciter winding (28). The primary winding (30) is disposed along with the core (36, 41, 47) on the bearing plate (17). The primary and secondary windings (30, 31) of the repeater (29) are disposed between the bearing plate (17) and the claw pole rotor system (23); the primary winding (30) is disposed in a stationary core (36, 41, 47), and the secondary winding (31) is disposed in a rotating core (35, 42, 48), and the windings are coupled via an air gap (38).
Abstract:
A normally lubricated bearing, typically a ball bearing, serves to transmit torque from a drive shaft for the fan wheel of an alternator. The driving and driven bearing surfaces form the coupling parts respectively on the drive side and the delivery side of the coupling. A cup spring is useful to control the bearing friction that must be overcome at a limiting speed at which the drive shaft begins to turn faster than the driven device. Such couplings are useful for engine fans, pumps, or other similar auxilary devices in motor vehicles.
Abstract:
To provide for improved starting and rapid supply of power from a generator coupled to an internal combustion engine, typically an automotive-type engine, a connection is provided between the starter network and the field of the generator coupled to the internal combustion engine to supply power from the on-board battery network of the vehicle to the field winding of the generator upon starting so that the field will be externally excited during starting, the generator thereby being provided immediately with field current and not relying on remanent magnetism for supply of power therefrom.
Abstract:
The electric machine, advantageously a generator, includes a machine housing with two end shields, a lamination bundle provided with a stator winding having winding heads and a rotor in the housing. To improve the cooling effect and reduce aerodynamic flow noise the machine housing is provided with at least one air guiding duct enclosing circularly at least one winding head on one side of the lamination bundle and the at least one air guiding duct is provided with at least one inlet opening and at least one outlet opening for cooling air to carry away heat dissipated during operation, and each of the at least one air guiding ducts is bounded exteriorly by one of the end shields of the machine housing and interiorly by one of the two annular walls inserted between the lamination bundle and the end shield bounding the at least one air guiding duct exteriorly.
Abstract:
Operating noise of a dynamo electric machine, and particularly a three-phase vehicular-type alternator, can be reduced by changing the reluctance or permeability of the magnetic path between rotor and stator of adjacent stator teeth by splitting the stator teeth to introduce additional radially extending gaps in the stator teeth or by distributing, non-uniformly or uniformly, ferromagnetic slot closers about the circumference of the stator slots while leaving, adjacent a stator slot with a magnetic closer, open stator slots or slots covered only with non-magnetic slot cover elements, such as treated paper, cardboard, or the like. This changes the frequency of attraction between rotor and stator to a frequency range which is not humanly perceptible or annoying, for example falling below the frequency range at which the alternator can operate, for example below idling speed of an internal combustion engine driving the alternator, or towards a frequency range so high that the operating noise level of the internal combustion engine masks any generator noise.
Abstract:
A wire conductor embedded in a circuit board for interconnecting rectifier diodes passes through a cut-out of the circuit board and is bent out of the cut-out beyond the surface of the circuit board so as to provide a U-shaped connection piece in which the end of a generator winding wire can be laid and clamped until it is soldered. The U-shaped connection piece can also be provided by a clip affixed to the embedded wire where it is accessible in a cut-out of the circuit board.