Stator Overlap Region Temperature Detection Unit
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Solution Overview
Problem
Existing electric motor stators face challenges in efficiently monitoring the temperature of windings across multiple phases, requiring multiple temperature detection units and complex cabling.
Innovation Solution
A stator design with overlapping winding regions allows a single temperature detection unit, equipped with sensors at the outer and inner diameters, to measure the temperature of windings from different phases, reducing the need for multiple sensors and cabling by positioning the unit in strategic overlap regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple temperature detection units are arranged to monitor windings of different phases, then temperature monitoring coverage is improved, but device complexity and cabling requirements increase
Solution Approach 1:
The patent merges multiple temperature detection functions into a single temperature detection unit by positioning it in the overlap region where windings from multiple phases are spatially coincident. This allows one sensor to monitor temperatures of windings from different phases simultaneously, reducing the total number of detection units needed while maintaining comprehensive monitoring coverage.
Solution Approach 2:
The temperature detection unit is designed with multi-functionality to serve multiple phases at once. By placing the unit in the overlap region, a single device performs the function of detecting temperatures for windings belonging to different phases, making the detection system universal rather than phase-specific.
2Productivity
If temperature detection units are positioned to measure multiple windings, then measurement efficiency is improved, but positioning precision requirements increase
Solution Approach 1:
The patent utilizes the local quality of the overlap region, where windings from different phases naturally converge. By positioning the temperature detection unit specifically in this localized overlap region, the system achieves efficient multi-winding measurement without requiring high positioning precision elsewhere in the stator structure.
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
This design enables efficient temperature monitoring of multiple windings with reduced cabling complexity, allowing for precise temperature detection of windings fed by different phases at a single position on the stator.
Implementation Method 1
a temperature detection unit (10) is arranged in the overlap region (13) and is designed to measure the temperature of the windings (9, 16) in the overlap region (13)
Data Source
AI summary
A stator for an AC motor, includes windings of a first layer, which extend over a first region of the stator and are connectable to a first phase, and windings of a second layer, which extend over a second region of the stator and are connectable to a second phase, wherein the first region is offset relative to the second region and at least one overlap region is formed which is smaller than the individual regions, and wherein a temperature detection unit is arranged in the overlap region and is designed to measure the temperature of the windings in the overlap region.