JPS5858856A - Slip ringless ac generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to alternating current generators, particularly three-phase alternating current generators used in automobiles.

According to DE 29 35 929 A1, it has a claw-pole armature, the claw halves of which are connected to each other by a connecting ring made of non-magnetic material and extending perpendicularly to the rotor axis. Slip ring-less three-phase alternating current generators are known. The coupling ring made of non-magnetic material used to mechanically couple both claw halves of the claw pole armature in this three-phase alternator is a short section cut from brass tube. It is made from minutes. However, this coupling ring often has to be additionally machined by turning, which results in high production costs. The coupling ring produced in this way is connected to the two claw halves by gluing, soldering or welding.

The object of the invention is to simplify and improve the known and expensive construction.

This problem is solved according to the invention in that the coupling ring is made from a wound strip.

The invention will be explained with reference to the following figures, in which a rotor shaft 15 is mounted in a bowl-shaped generator casing with two bearing shields 11 and 12 via bearings 13 and 14.
is supported. The rotor shaft 15 has a central section 16 of large diameter. A first claw wheel 17 is held in the central section 16 . The first claw wheel 17 is connected to the second claw wheel 1 by rehetting, welding or soldering via a non-magnetic coupling ring 18.
9 are combined. In other words, the second claw wheel 9 is not directly fixed to the rotor shaft 15.

The drive-side bearing shield 11 has a holding device 21 to which an excitation coil 22 is fixed. A stator 23 carrying a three-phase current coil 27 is fitted into the housing part, which is the bearing shield 11.12. A commutator 24 is connected to this three-phase current filter 27 . This commutator 24 receives direct current, which is necessary for driving a car.
In particular, in addition to the charging current for the starter outlet, the excitation current for the excitation coil 22 is also supplied via the voltage regulator 25 . Power is supplied via cable 26. The ball wheels 17, 19 are provided with mutually engaging claws 20.

2 to 4, a coupling ring 18 made of sheet brass 30 is shown. In this case, the brass plate 30 is cut to the required length and has one inclined surface 33 or 3 at each end 31 and 32.
4 is attached, and then an electric weld bead 35f is joined.

In the embodiments of FIGS. 5 and 6, a narrow brass sheet gund 30 of Ilg is used as the starting material. In contrast to the previously described embodiments, in the embodiment shown in FIGS. 5 and 6 a form-fitting connection is chosen for joining the two ends 3], 32.

The embodiment shown in FIG. 5 has a dovetail-shaped protrusion 36 and a dovetail-shaped notch 37, and the protrusion 36 is fitted into the notch 37 without any play. Projection 36 and cutout 37
is formed by a follow-up cutting tool, not shown.

This follow-up cutting tool ensures a precise fit of the projection 36 into the notch 37.

In the embodiment shown in Fig. 6, the shape connection is made of a thin brass plate.
It is manufactured using a follow-up cutting tool that cuts 0 to the required length. In this case, no other connecting means are necessary, since the form-locking connection is obtained by the mutually cut head 39 engaging without play in the recess 38 produced during the cutting process.

In the case of the coupling ring shown in FIGS. 7 to 10, the coupling ring consists of a plurality of turns 41, 42 of a wire coil 43. In the case of the coupling ring shown in FIGS. In order to manufacture this wire rod coil 43, a wire rod 44 of copper, brass, or non-magnetic steel having a square cross section is provided as shown in FIG. Before the coiling process, this wire 44 is provided with a number of tongues 46 extruded from the cross section of the wire by continuous pressing on the longitudinal side 45 facing the adjacent windings in the coiled state. In this case, a plurality of tongues 46 are provided per wire section, each yielding a winding 41 or 42. These tongues 46 have a small axial spacing between the individual turns. This results in the advantage that during the subsequent soldering process the intermediate spaces remaining between the individual windings are filled with soldering material. In order to compensate for manufacturing errors, the coupling rings produced in this way can be rotated with respect to each other so that the coupling rings are in full contact with the receiving grooves 47 turned into the claw 20. It has advantages. Enabling the windings to rotate slightly with respect to each other in this way is facilitated by the fact that the tongue 46 contacts the unprocessed or smooth back side of the adjacent winding. .

In the embodiment shown in FIGS. 9 and 10, the coupling ring is also made of brass or copper or non-magnetic steel 44 with a square cross section. The wire 44 has tongues 48, 49 cut out from the cross section of the wire on its longitudinal side. These tongues 48, 49 are formed offset with respect to the longitudinal axis of the wire. These tongues are produced by shearing punches, not shown, which engage the wire cross section at a depth of between about 0.5 mm and 1 mm. This shearing punch is applied alternately from the upper surface, which is located on the upper side in the drawing and will later form the outer peripheral surface of the wire coil, and from the lower surface on the opposite side. On the other hand, the vertical side surface of the wire rod 44 in which the tongue-shaped portion is not provided
□ remains unprocessed and costs money.

[Brief explanation of the drawing]

The drawings show several embodiments of the invention, the first
The figure is an axial cross-sectional view of a slipless three-phase alternator.
Figures 3, 4, 5, 6, 7, 8, 9, and 10 show various types of coupling rings used in the three-phase alternator of the present invention. It is a figure showing an example.

Claims (1)

[Claims] 1. An alternating current power generator having a claw pole armature, the claw halves of which are made of a non-magnetic material, and which are connected to each other by thin coupling rings that extend perpendicularly to the rotor axis. A slip ring-less alternator, characterized in that said coupling ring (18) is made from a wound strip. 2. The ends (31, 32) of the strips are joined together by form-fitting to form a joining ring (18);
A slip ring-less alternator according to claim 1. 3. A slip ring-less alternator according to claim 2, wherein the ends (31, 32) of the strips are engaged with each other by dovetails. 4. One end of the strip (31, 32) has a protrusion with a head (39) cut into a notch, and the other end of the strip has a notch (in which the head (39) fits). 3
8) is provided, the slip linkless alternator according to claim 2. 5. The ends (31, 32) of the strip material are butted and connected to each other by welding, claim 1.
Slip ring-less alternator as described in section.・6. A plurality of windings (41, 42) located side by side of a wire coil (43) in which a coupling ring (18) is wound into a cylindrical shape
) A slip ring-less alternator according to claim 1, comprising: 7. The slip ring-less alternator according to claim 6, wherein the @ material coil (43) has a protrusion that projects in the axial direction toward the adjacent winding. 8. The wire (44) of the wire coil (43) has a rectangular, in particular square, cross section, and along one of the longitudinal sides of the wire, at several points in the wire section, each producing one winding. Tongue-shaped parts (46, 48
, 49) are provided, and these tongue-like parts (46, 4
8, 49) projecting toward adjacent windings.