DD288940A5 - Arrangement for phase insulation within the winding head of electrical machines - Google Patents

Abstract

The invention relates to an arrangement for phase insulation in the winding overhang in electrical machines. It contains an arrangement for the phase insulation of the stator coils in external rotor motors with which the winding heads of the motor inner stator are fastened and shaped at the same time. The arrangement is that the existing of insulating end plates, which insulate the end face of the laminated core, are made with rigid chamber systems. The structure of the rigid chamber system depends on the type of winding and is to be designed so that only single coils or several coils with the same voltage potential can be inserted in a coil chamber. The rigid partitions eliminates additional phase insulation, in addition, the layers of the coils are fixed, so that the reworking such as shaping and bandaging omitted. In the drawings, Figs. 1 and 2 illustrate the invention substantially. 1 = inner stator core; 2 = end disc with chambers for the lower level; 3 = chamber disc for the upper floor; 4 = Cover plate for the switching connections. Fig. 1, 2 {Auienläufermotor; Phase insulation; Phase chambers; end plates; Winding; winding; Assembly}

Description

For this 5 pages drawings

Field of application of the invention The invention relates to an arrangement for phase insulation of the stator coils in external rotor motors, with the same time Winding heads of the motor inner stator (stator) are attached and shaped. The external rotor motor are preferably used as drives of radial and axial fans in air conditioning. Characteristic of the known state of the art Due to the low dielectric strength of the enameled wire coils with different voltage potential

additionally insulated inside the winding head. The phase insulation in the winding head of the stator in external rotor motors is carried out in the known methods with flexible insulating materials such as Vlier, films, insulating paper, etc., these materials are inserted during the winding process between the corresponding coil.

After the switching connections are made, the winding heads are solidified by a cord bandage and with help

pressed by presses in the final form. This state of the art is described in the textbook "Fachkunde Elektromaschinenbauer"

Page 253/254. The end discs known from the patents CH-PS 493137 and DE-PS 241583902 have the task of winding heads

to isolate the outer conductive components such as housing, axle tube and the laminated core and the task the

Attach winding head. The phase insulation was not considered in the patents. In all known and described methods of winding occur considerable technological difficulties, since the Phase insulators are used manually, which means a high work potential use, further depends on the Quality depends essentially on subjective factors, relatively high numbers of rejects can hardly be avoided. Aim of 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 machine winding without time-consuming manual phase insulation

guarantee. 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 achieved in that the existing of insulating material End discs, which are placed on the front side of the laminated core, are manufactured with rigid chamber systems. The Design of the rigid spool chambers on the end plates depends essentially on the winding and the Wickelschritt, it is important that in a coil chamber only single coils or more coils with the same Voltage potential may be inserted. The rigid chamber system simultaneously determines the dimension and spatial position of the individual coils. The winding head receives

thus a compact and solid form, the reshaping and bandaging eliminated.

The Stirnschoiben can be produced in the plastic injection molding process, they are therefore relatively cheap. When choosing the Plastwerkstcffes

the temperature resistance and the mechanical and electrical strength must be considered. The invention will be described below with reference to two embodiments.

Exercise booklet 1 The structure of the subject invention is illustrated in the accompanying drawings. Flg. 1: View of the wound stator of an external rotor motor 2: sectional view of Fig. 1st Fig.3: Scheme of the coils in the winding head of the selected example Fig.4: thrust washer for the switching connections Fig. 6: Kammemscheibe for the upper floor Fig.6: sectional view of Fig.5 Fig. 7: end plate with the 3 chambers for the lower floor Fig.8: shows the figure 7 For the representation of the subject invention, an inner stator (Statord) Fig. 1 was selected with 24 grooves, the winding type 3 is a 4-pole three-phase winding with coils of unequal width, the winding steps are 1: 6 and 1, 8. At the winding

of the stator form in Wickolkopf 2 floors.

After the two-sided placement of the end plates 2 according to FIG. 7 on the laminated core 1, the 3 coil groups

the lower floor in the respective offset by 120 ° rigid chambers 9 Fig. 7/8 wound. The rigid insulating 8 on the

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

axial direction.

After the complete winding of the lower floor, the rigid chamber discs 3 Fig. 5 for the upper floor

placed; The winding is analogous to the lower floor. Due to the rigid insulating walls between the coil groups and the floors eliminates additional phase insulation, also receives the Wickolkopf thereby a compact and solid form, so that the reworking such as molding and bandaging omitted.

The resulting switching connections are held together with a shaped cover plate 4 Fig. 4. Example 2 The structure of the subject invention in one-piece design is shown on the accompanying drawings. Fig. 9: view of the wound stator of an external rotor motor with end disks, wherein the chambers of the lower and

Fig. 10: Representation of the end disk of Fig. 9 Fig. 11: A sectional view of Fig. 10

For the representation of the subject invention, an inner stand was selected as in Example 1. Be! this embodiment consist of the rigid chambers on the end disks 5 Fig. 9 for the lower and upper floors of a Molded part. The advantage of the one-piece Si rnscheibon 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 and the half-open chamber cover 7 Fig. 10/11 can be wrapped.

The supports 6 Fig. 10/11 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 and shaping of the stator windings in external rotor motors with insulating end plates, which are arranged on the front side of the laminated core, characterized in that the end plates, which cover the pole teeth and the laminated core, are provided with axially directed rigid chambers , which are arranged according to the type of winding and the winding step. 2. Arrangement according to claim 1, characterized in that the end disks with phase chambers for the 1st floor and 2nd floor consist of a molded part and that in multi-day windings according to the floors separate rigid chambers are placed. 3. Arrangement according to claim 1 and 2, characterized in that the rigid chambers are designed to be open or semi-open in the axial direction.