DE202018102833U1 - electric motor - Google Patents

Abstract

Electric motor having an internally disposed rotor and an externally arranged stator (3) having a plurality of coils (4) of a phase (10), characterized in that, the radially oriented coils (4) of a phase (10) with a wire (5) are wound in series without interruption, wherein each of the innermost turn (6) of the Nth coil (4) with the outermost turn (7) of the (N + 1) th coil (4 ') connected is.

Description

The invention relates to an electric motor according to the preamble of the first claim

State of the art:

Electric motors with stator windings are known, for example from the following publications: DE102015226000 A1 . DE102011011809 A1 . WO2011045016 A2 . US2016126815 A1 and EP2913911 A1 ,

Because the known electric motors have many contact points on the stator windings and a Verschauftring, resulting in a complex interconnection with the corresponding manufacturing costs. In addition, avoidable contact resistance at the contact points. The shuttering ring connects the windings of one phase to each other and to the terminal box.

Task:

The task is to avoid the Verschaltring and reduce the number of contact points.

Solution:

The objects are achieved by the features of the independent claims, advantageous developments are given in the dependent claims 2 to 4.

An electric motor having an inner rotor and an outer stator has, among other components, a plurality of coils of one phase, and also has a plurality of phases.
The radially aligned coils of one phase are wound with a wire in series without interruption, with each of the innermost turns of the Nth coil connected to the outermost turn of the (N + 1) th coil. The outermost turn of the first coil and the innermost turn of the last coil of a phase are connected to the wire ends used as terminals.

Preferably, the coils each comprise a core. The nuclei of the group of nuclei are connected and form a star.
Further preferably, the cores are comprised of an iron yoke.

To make the electric motor, the radially aligned coils of a phase are wound around a core with a wire in series without interruption, with each of the innermost turns of the Nth coil with the outermost turn of the (N + 1) -ten coil is connected and wherein after the production of the coils of all phases, the cores and the coils are enclosed with an iron yoke.

Advantages:

The preparation according to the invention requires a smaller number of contact points. This reduces the electrical contact resistance and allows for savings in manufacturing process time and manufacturing process complexity.
Another advantage is that in the uninterrupted winding of all coils of a phase of the so-called Verschaltetring is saved. In addition, this leads to a reduction in the possibility of errors and thereby also reduces the costs both at the component and at the production process level

Application:

Electric motors for driving pumps and actuators, in particular in vehicles and moving work machines.

Pictures and exemplary execution:

• 1 shows for a stator ( 3 ) the star ( 8th ) of the cores ( 8th ) and the winding scheme of four coils ( 4 ) of a phase ( 10 ). The wire ( 5 ) from the innermost turn ( 6 ) of the first coil ( 4 ) to the outermost turn ( 7 ) of the second coil.
• 2 shows the star ( 8th ) with only one wound phase ( 10 ).
• 3 shows the star ( 8th ) with two wound phases ( 10 . 10 ' ).
• 4 shows that of the iron backbone ( 11 ) included star ( 8th ).

LIST OF REFERENCE NUMBERS

Third

stator

4th

Kitchen sink

5th

wire

6th

convolution

7th

convolution

8th.

core

9th

star

10th

phase

11th

Iron yoke

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102015226000 A1 [0002]
• DE 102011011809 A1 [0002]
• WO 2011045016 A2 [0002]
• US 2016126815 A1 [0002]
• EP 2913911 A1 [0002]

Claims (3)

Electric motor having an internally disposed rotor and an externally arranged stator (3) having a plurality of coils (4) of a phase (10), characterized in that, the radially oriented coils (4) of a phase (10) with a wire (5) are wound in series without interruption, wherein each of the innermost turn (6) of the Nth coil (4) with the outermost turn (7) of the (N + 1) th coil (4 ') connected is. Electric motor after Claim 1 , characterized in that the coils (4) each comprise a core (8), wherein the cores (8) of the group of cores (8) are interconnected and form a star (9). Electric motor after Claim 2 , characterized in that the cores (8) are covered by an iron yoke (11).

Images