DD288940B5 - Arrangement for phase insulation within the winding head of electrical machines - Google Patents

Description

For this 5 pages drawings

Application blot of the invention

Dio invention relates to an arrangement for the phase insulation of the stator coil boi Außenlftuformotoron, with the same time the winding heads of Motorinnonständers (stator) are fixed and shaped.

The external rotor motor is preferably used as an anvil of radial and axial fans in air conditioning technology.

Characteristic dos bekannton state of the art

The known from the patents DE-PS 2415839 C2, DE-OS 2615419, DE-OS1538728, CH-PS 493137 end plates of insulating material with hub and outer axially directed support fingers have the task, the Wlckelkönfe against the outer conductive components, such as housing, axle tube and isolate the laminated core and attach the winding head.

The phase insulation was not considered in the patents.

In all known and described methods of winding considerable technological difficulties occur because the phase insulation is used manually, which means a high work potential use, further depends in this case on the quality of subjective factors substantially.

Due to the low dielectric strength of the enameled wire coils with different voltage potential are additionally isolated within the winding head. Dio phase insulation in the winding head of the stator at Außonläufermotoren takes place in the known methods with flexible insulating materials such as fleece, films, insulating paper, etc., these materials are inserted during the winding process between the corresponding coils.

ZIoI the invention

The aim of the invention is the rational design of the winding technology on the stator of the external rotor motor and a significant improvement in the quality of the final product. At the same time there is the goal to reduce the previous high production committee to a minimum.

Explanation of the essence of the invention

The object of the invention is to ensure the machine winding without time-consuming manual phase insulation. At the same time there is the task to eliminate the rework, such as molding, pressing and bandaging, since in these works the paint layers of the winding wire are often damaged.

The above objects are based on insulating end plates, which are mounted on the front side and which are provided with axially directed, the coil groups receiving insulating walls and a hub for attachment of a cover plate, according to the invention solved that according to the winding and the winding step with rigid, axially directed insulating walls forming chambers first end disc is arranged on the laminated core, which adjoins a second, placed on the hub of the former second disc with equally formed chambers. It is important that only single coils or several coils with the same voltage potential may be inserted in a coil chamber.

The chambered end plates can Auth, if they are designed to be open or semi-open in the axial direction, from a molded part hergestel ¹ 'be.

The rigid chamber system simultaneously determines the dimension and spatial position of the individual coils. The winding head thus receives a compact and solid form, the post-forming and bandaging omitted.

The end plates can be produced in the plastic injection process, they are therefore relatively cheap. When selecting the plastic material, the temperature resistance and the mechanical and electrical strength must be considered.

The invention will be described below with reference to two embodiments.

-2- 288 940 embodiments

example 1 The structure of the subject invention is illustrated on don billing drawings. Flg. 1: View of the gewlckolton stator of an external rotor motor Pig. 2: sectional division of the Flg. 1 Flg. 3: Diagram of the coils in the winding overhang of the selected example Flg. 4: Pressure disc for the Schnltverblndungen FIg 5: chamber disc for the upper floor 6: sectional view of Fig. 6th Fig. 7: end plate with the 3 chambers for the lower floor Flg. 8: sectional view of FIG. 7. For the representation of the subject invention, an inner stator (stator) was selected as shown in FIG. 1 with 24 grooves, the Type of winding (file 3) Is a 4-pole three-phase winding with coils of unequal width, the winding steps are 1: 6 and 1: 8. Bel dor Winding of the stator are formed in the winding head 2 floors. After the Beldseltlgen placing the Stirnschelbon 2 according to FIG. 7 on the laminated core 1, the 3 Spulongruppon

The lower floor is wrapped in the staggered rigid chambers 9 (Fig.7 / 8) 120 "each

End discs of Fig. 7/8 are at the bottom of the groove, dom winding step 1: 6 accordingly and on the associated pole teeth In

axial direction.

After complete winding of the lower etago, the rigid Kammor slices 3 (Fig. 6) are made for the oboro floor

placed; The winding is analogous to the lower Etago. The rigid Isoliorwände zwischon don Spulongruppon and the floors eliminates additional phase insulation, also receives the winding head thereby a compact and solid form, so that the reworking such as shaping and bandaging omitted.

The resulting switching connections are held together with a shaped cover 4 (Flg.4).

Belsplol2

The structure of the subject invention In one-piece design Is illustrated on the accompanying drawings. Flg. 9: view of the wound stator of an external rotor motor with end discs, wherein the chambers of the lower and

Fig. 10: Representation of the front disc of Fig. 9 Fig. 11: a sectional view of Fig. 10th

For the representation de? Subject of the invention, an inner stand was selected as in Example 1. In this embodiment, the rigid chambers on the end disks 5 (Fig. C <) for the lower and upper floors consist of one Molded part. The advantage of the one-piece end plates 5 is that the chambers are no longer during the winding process

must be assembled floor by floor, thereby achieving an optimal winding time reduction.

The chambers for the lower floor are made semi-open, so that with the help of suitable templates the wire between

the inner collar in and the half-open chamber cover 7 (Fig. 10/11) can be wrapped.

The supports 6 (Fig .: 0/11) above the half-open chambers in the axial direction give the winding head of the upper floor the Strength and shape, thereby eliminating the rework as in Example 1.

Claims (3)

1. Arrangement for phase insulation Within the winding head of electrical machines and shaping of the stator windings in external rotor motors with insulating endschoiben, which are arranged on the front side on the laminated core and axially directed, the coil groups receiving insulating parts and a hub for attaching a cover plate are provided, characterized in that a first end disk forming corresponding to the type of winding and the winding step with rigid, axially directed insulating walls is arranged on the laminated core, which adjoins a second second disk attached to the hub of the former with likewise formed chambers. 2. Arrangement for phase insulation according to claim 1, characterized in that the two chambers provided with chambers consist of a molded part. 3. Arrangement for phase insulation according to claim 1 and 2, characterized in that the chambers are formed in axiaier direction open or semi-open.