Stator Winding Head Sensor Mounting for Accurate Temperature Detection
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Solution Overview
Problem
Existing temperature measurement methods for stator devices in electrical machines often fail to accurately capture the temperature of the winding head due to the distance from the neutral conductor, leading to indirect and less precise measurements.
Innovation Solution
A stator device with a temperature sensor fastened onto the winding head using an elastically deformable fastening device that applies a restoring force, ensuring direct and precise temperature detection by encompassing the winding head with its legs and web, allowing for axial movement and secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the temperature sensor is attached to the neutral conductor using a spring clamp, then the temperature measurement is easy to implement, but the measurement location is far from the winding head resulting in inaccurate temperature detection
Solution Approach 1:
The patent introduces a mounting device with elastic legs as an intermediary between the temperature sensor and the winding head. This mounting device enables direct contact measurement by mediating the connection between the sensor and the target object (winding head), thereby achieving both ease of installation and high measurement accuracy simultaneously
2Ease of operation
If the temperature sensor is positioned far from the winding head, then the installation is simpler, but the measured temperature does not correspond to the actual winding head temperature
Solution Approach 1:
The mounting device utilizes three-dimensional space by extending elastic legs in different directions (first radial side and second radial side) to encompass the winding head. This spatial arrangement allows the sensor to be positioned directly at the winding head while maintaining installation simplicity through axial insertion
3Device complexity
If a conventional mounting method is used, then the device structure is simpler, but the temperature sensor cannot be pressed directly against the winding head
Solution Approach 1:
The mounting device employs elastic legs that can change their physical state between deformed and restored positions. This parameter change (elastic deformation) enables the legs to press the temperature sensor directly against the winding head during operation while maintaining a simple overall device 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 solution enables more accurate temperature measurement directly on the winding head, improving the precision and reliability of thermal monitoring, which is essential for preventing overheating in electrical machines.
Implementation Method 1
the first leg is designed to be elastically deformable in such a way that it exerts a restoring force pressing the temperature sensor against the first radial side
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Stator device (2) for an electric machine (1), comprising: - a stator core (5) having a longitudinal axis (6) and an axial end face (7); - a stator winding (9) which forms a winding head (10) extending out from the stator core (5) at the end face (7) with a first radial side (12) and a second radial side (13) opposite the first radial side (12); - a temperature sensor (14) configured to detect a temperature on the first radial side (12); and - a fastening device (15) arranged on the winding head (10), comprising - a first leg (27) arranged on the first radial side (12) and holding the temperature sensor (14), - a second leg (28) arranged on the second radial side (13), and - a web (29) extending radially along the winding head (10) and connecting the first leg (27) and the second leg (28);wherein the first leg (27) is designed to be elastically deformable in such a way that it exerts a restoring force pressing the temperature sensor (14) against the first radial side (12).