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Electric machine

A motor shaft and housing technology, applied in the field of motor vehicles, can solve the problems of hindering the cooling of castings, weakening the heat dissipation of the rotating magnetic field winding, limiting the continuous load of the motor, etc., and achieves the effects of improving cooling, reducing eddy current loss and improving continuous load.

Active Publication Date: 2018-07-31
BAYERISCHE MOTOREN WERKE AG
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, the rotating magnetic field of the rotating field winding generates eddy currents in the conductive surfaces of the cooling plate and housing, which in turn act as an additional heat source and thus impede the cooling of the casting
In other words, the heat dissipation of the rotating field winding is reduced, thereby limiting the continuous load on the motor

Method used

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Embodiment Construction

[0032] Corresponding components and parameters are always provided with the same reference symbols in all figures.

[0033] figure 1 The electric machine 2 shown is an electric drive of an electric vehicle or a hybrid vehicle. For this purpose, electric machine 2 is expediently designed as an asynchronous electric machine and integrated into the drive train of the electric or hybrid vehicle. The electric machine 2 comprises a (motor) housing 4 in which a rotor 6 is mounted rotatably about an axis D of rotation.

[0034] The rotor 6 is arranged axially fixed on a rotor shaft or motor shaft 8 , which is supported via two bearings 10 on opposite end sides of the housing 4 relative to the housing. The rotor 6 is enclosed within the housing by the stator 12 . The stator 12 comprises a stator pack or stator lamination pack (not specified in detail) which has a plurality of axially extending stator slots 14 on the inner circumferential side. In this case, the stator slots 14 exte...

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Abstract

The invention relates to an electric machine (2) having a housing (4) and having a stator (12) inside the housing, surrounding a rotor (6) arranged on a motor shaft (8) so as to be fixed to said shaftand having a rotary field winding which, at the ends of the stator (12), forms a winding head (16), wherein the winding heads (16) are embedded in a thermally conductive potting material (20), wherein the potting material (20) is in thermal contact with the housing (4) along the outer circumference of the winding head (16), and wherein a segmented cooling plate (24) is arranged on the inner circumference of the potted winding head (16).

Description

technical field [0001] The invention relates to an electric machine comprising a housing and a stator inside the housing, which surrounds a rotor fixedly arranged on the machine shaft and has a rotating field winding which is formed on the end faces of the stator in each case. a winding head. The invention also relates to a motor vehicle equipped with such an electric machine. Background technique [0002] Electric machines can be used as motors or generators in various technical applications, for example as compressor drives or starter drives. Especially high-efficiency electric machines are now used as electric drive motors in hybrid or electric vehicles. [0003] Such, in particular brushless, motors as three-phase motors usually have a laminated stator stack on the stator side. The stator laminations consist of a plurality of stator teeth and stator slots in which the electric rotating field winding is embedded in the stator slots in the form of a single stator coil m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/38H02K9/22H02K15/12
CPCH02K3/38H02K15/12H02K9/227
Inventor J·布卢姆A·古奇奥纳A·胡贝尔M·朗J·默韦特
Owner BAYERISCHE MOTOREN WERKE AG
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