Stator having insulation layer

Abstract

The invention relates to a stator (1) for an electric machine, comprising a laminated core (2), having a plurality of grooves (4), uniformly distributed in the circumferential direction (10) about a longitudinal axis (3) and extending continuously in a longitudinal direction (11) of the laminated core (2), each for receiving at least two electrical conductors (8) having a substantially rectangularcross-section, said electrical conductors (8) being insulated from each other and in respect of the laminated core (2) by means of at least one insulation layer (9), covering in the radial direction(12) and circumferential direction (10), and at least over a stator height (1) of the stator (1) in the longitudinal direction (11). For defect-free insulation, the at least one insulation layer (9) comprises a thermoplastic high-performance polymer, which is continuously closed in the circumferential direction (10) and in the radial direction (12) and moulded directly on the electrical conductor(8), preferably by means of an extrusion process, wherein the insulation layer (9) has a total circumferential thickness (13), at least in the circumferential direction (10), which is at least 1.5 times to 3 times, preferably 1.8 times to 2.2 times a total radial layer thickness (14) in the radial direction (12) of the respective electrical conductor (8).

Description

technical field [0001] The invention relates to a stator for an electric machine, in which the electrical conductors are surrounded by an insulating layer in the circumferential direction and in the radial direction, so that a particularly high packing density of the electrical conductors can be achieved. Background technique [0002] Such electric machines as well as the stators used therefor are known in principle from the prior art, so that reference is made to this relevant prior art for further details thereof. The electric machine can preferably also include a rotor, which can be arranged, for example, on a rotatable shaft in a rotationally fixed manner. During operation of an electric machine, for example designed as an electric motor, the rotor is set in a rotational motion due to the magnetic field generated. In principle, however, the stator can also be used to generate the rotating field without a rotor. [0003] A stator for an electric motor comprises electric...

AI Technical Summary

Problems solved by technology

However, before the second or top coat can be applied, the lacquer must be cured in an oven prior to further processing, which entails increased process effort

[0008] US2015243410A1 cites the problem that an insulating layer on an electrical conductor consisting of several varnish layers of a thermosetting resin leads to a decrease in adhesion between the individual varnish layers and preferably bubbles as the number of varnish layers increases

Here, however, hardening of the base paint layer is also required, which entails high process effort

Images