DE4409794C1 - Fastening for equalising connection lines of high-power DC machines - Google Patents

Abstract

The lines (1) are taken through relatively small openings (2) in the laminated rotor where they are subject to increased stress with reverser operation and chopper power supply. For security two U-shaped shells (4, 5) of conductive nonmagnetic material forming a channel (6) with a pref. insulated outer layer (9) are gripped by two-part clamps (7, 8) which hold the shells together and couple them to the rotor lamination stack (3). Unevenness in the contact surface is countered by an elastic packing (10).

Description

The invention relates to a holder of Compensation connecting strands 2nd and / or 3rd type in or on Rotor laminated core of commutator machines.

Such a holder is e.g. B. known from US-PS 26 32 125.

When using thermal class 200, DC machines can small shaft heights with relatively large outputs become. The small momentum to be achieved thereby Advantages especially in reverse operation. Because of the low Yoke height of the runner is that of two or more gears Compensation connections to be provided for grinding developments 2. 3. Kind in the form of the US-PS 26 32 125 or DE 43 14 471 C1 applicable. The Compensating conductor strands are replaced by relatively small ones Recesses in the laminated core led to the sheet metal cross section in the Sheet pack not to reduce to such an extent that impermissible high induction occurs. The recesses can slanted or straight to the rotor shaft.

The known from US-PS 26 32 125 and the solution proposed in the earlier application 43 14 471 is another Construction volume reduction no longer in the conventional way Suitable for use. There are also special spacer elements and / or Insulating elements necessary, which should be reduced.

The invention specified in claim 1 is the problem based on a small construction Compensating connecting strands 2nd and / or 3rd type in To create DC machines and keep them durable with the Connect the laminated core. This is particularly important for Machines that are used in reverse operation, because at these correspondingly high mechanical stresses Components are available. In addition, the construction should be as possible just be designed.

The characteristics solve this problem of claim 1.  

As an advantage compared to conventional solutions, it is relatively simple Manufacture of fasteners including the Highlight insulation and the contact surface to the laminated core. It Elaborate spacer elements between the laminated core and the equalization connecting strands. In addition, the Cutouts in the laminated core to accommodate the Compensating interconnect lines are kept very small, which leads to leads to a small rotor diameter.

Another advantage is the large area moment of inertia special U-shaped sleeves that prevent the Fasteners in the radial and tangential direction prevents dynamic stress and thus a safe Function of the rotor even at high speeds and in Reverse operation guaranteed.

Advantageous embodiments of the invention are in the Claims 2 to 5 specified. The further training according to claim 2 enables the canal to be laid out over a large area Cut-outs in the rotor laminated core and thus good absorption the resulting centrifugal forces. The further training according to claim 3 and 4 facilitate assembly. When training after Claim 5 is a galvanic connection between Runners laminated core and the channel reached.

An embodiment of the invention is in the drawing shown and is described in more detail below.

It shows

Fig. 1 shows the partial sectional view of a rotor laminated core in the area of the compensating connecting strands guided through the rotor laminated core and

Fig. 2 shows the sectional view in the area AA.

The mutually insulated compensating connecting strands 1 are guided through relatively small cutouts 2 in the rotor laminated core 3 , two interlocking U-shaped sleeves 4 and 5 made of highly conductive and non-magnetic material surrounding the compensating connecting strands 1 and thus forming a channel 6 . In this way, a very stable fastening of the compensating connecting strands 1 is achieved. At the same time, a possible residual magnetic field is shielded by this type of fastening.

The channel 6 is preferably provided with an insulating outer layer 9 , which prevents the short circuit of the individual sheets of the rotor. This is necessary so that the tensions in the sheets, which occur especially when chopper is fed, cannot generate any currents between them.

At the end-face outlet points of the channel 6 with the equalizing connection strands 1 from the rotor core 3 is a U-shaped at the rotor core 3 clamp part 7 is detachably secured, is secured to the means of known fastening elements on the two arms of a clamping piece shell. 8 The lower part of the clamping piece 7 and the upper part of the clamping piece 8 have the task of holding the two U-shaped sleeves 4 and 5 together and, at the same time, connecting them in a durable manner to the rotor laminated core 3 . For this purpose, the upper clamping part 8 is screwed to the lower clamping part 7 so that the channel 6 is firmly clamped between the two clamping pieces 7 and 8 . The clamping piece lower part 7 preferably has elongated holes 11 which allow the clamped clamping pieces 7 and 8 to be screwed to the rotor laminated core 3 in such a way that the channel 6 lies in the radial direction outside on the wall of the recess 2 of the rotor laminated core 3 .

In order to achieve the largest possible contact surface between the channel 6 and the rotor laminated core 3 , an elastic insert 10 is introduced between the channel 6 and the insulating outer layer 9 , which the unevenness on the contact surface of the rotor laminated core 3 or the curvature of the oblique opening Compensates contact surface on the rotor laminated core 3 and hardens during the impregnation and drying process. Thus, the rotor laminated core 3 reliably absorbs the centrifugal forces that occur on the masses of the compensating connecting strands 1 during rotation.

Claims (5)

1. Holder of compensating connecting strands of the 2nd and / or 3rd type in or on the rotor laminated core of power inverter machines, characterized by the following features:

• - The compensating connecting strands ( 1 ) are guided through relatively small recesses ( 2 ) in the rotor laminated core ( 3 ), with two flat-sided U-shaped sleeves ( 4 ) and ( 5 ) made of highly conductive and non-magnetic material, the compensating connecting strands ( 1 ) surround and hold them together inside and thus form a channel ( 6 ),
• - at the end-face outlet points of the channel (6) with the equalizing connection strands (1) from the rotor core (3) is fixed to a U-shaped clamp lower part (7) releasably attached to the rotor core (3), on which means of known fastening elements on the two arms of a clamping piece shell ( 8 ) is attached,
• - The channel ( 6 ) is surrounded by an insulating outer layer ( 9 ).

2. Holder according to claim 1, characterized in that between the rotor laminated core ( 3 ) and the channel ( 6 ) one or more interposed inserts ( 10 ) are arranged, which preferably harden during the impregnation and drying process. 3. Holder according to claim 1, characterized in that the U-shaped clamping piece lower part ( 7 ) is provided with elongated holes ( 11 ). 4. Holder according to claim 1, characterized in that the U-shaped sleeves ( 4 ) and ( 5 ) are somewhat conical in the leg region and are adapted to one another. 5. Holder according to claim 1 to 4, characterized in that the insulating outer layer ( 9 ) is missing at one end of the channel ( 6 ) in the region of the lower clamping part ( 7 ) and the upper clamping part ( 8 ).