Stator Cooling Duct Separator Layout for Uniform Coil Temperature
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Solution Overview
Problem
Conventional separating web elements in electrical machines cause local temperature increases, affecting efficiency and stator service life due to inadequate heat distribution and dissipation.
Innovation Solution
An obliquely oriented separating web element that sweeps over a larger surface area, contacting multiple coils and end faces of the stator carrier, with secure fastening elements to enhance heat exchange and reduce thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional separating web element is used to interrupt the cooling duct, then the cooling medium flow path is separated, but local temperature increase occurs below the separating web element
Solution Approach 1:
The separating web element is oriented obliquely to the axis of rotation instead of being perpendicular, transforming the geometric arrangement from a single-plane interruption to a three-dimensional configuration that spans multiple coils. This angular orientation allows the separating web element to contact multiple coils (at least two) simultaneously, distributing the thermal load across a larger surface area and preventing localized temperature accumulation while maintaining effective flow path separation.
2Device complexity
If the separating web element is oriented perpendicular to the axis of rotation, then the structure is simple, but heat distribution is inadequate and thermal stress increases
Solution Approach 1:
The separating web element is designed with asymmetric orientation relative to the cooling duct, specifically at an angle between 0° and 90° to the axis of rotation. This asymmetric configuration optimizes heat distribution by allowing the separating web element to sweep across multiple coils, creating a more uniform thermal field and reducing concentrated thermal stress points that would occur with symmetric perpendicular orientation.
3Device complexity
If the separating web element contacts only one coil, then the structure is simple, but thermal stress on the separating web element is excessive
Solution Approach 1:
The heat dissipation function is segmented across multiple coils by orienting the separating web element to contact at least two coils simultaneously. This segmentation distributes the thermal burden from any single coil across multiple contact points, reducing the thermal stress on the separating web element while maintaining structural simplicity. The separating web element effectively divides the thermal load into multiple zones of heat exchange.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improved temperature distribution and heat dissipation across multiple coils, reducing thermal stress and extending the service life of the electrical machine.
Implementation Method 1
multiple coils of the stator are preferably also contacted by a separating web element in order to distribute and dissipate heat between the coils and the separating web element
Implementation Method 2
the stator carrier comprising at least one cooling duct for a cooling medium, the at least one cooling duct running in the circumferential direction
Data Source
AI summary
The invention relates to an electric machine (1) comprising: - an axis of rotation (D), - a stator carrier (2), - wherein the stator carrier (2) comprises at least one cooling duct (3, 4, 5) for a coolant medium, wherein the at least one cooling duct (3, 4, 5) runs in the circumferential direction (U), and - a separator element (6) for interrupting the at least one cooling duct (3, 4, 5), - wherein the separator element (6) is arranged on the stator carrier (2), and - wherein the separator element (6) is oriented obliquely with respect to the axis of rotation (D).