Vehicle Stator Bus Bar U-Shaped Gaps for Sensor Heat Absorption
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Solution Overview
Problem
Existing stators of rotating electrical machines for vehicles face challenges in maintaining temperature measurement accuracy in bus bars due to limited heat receiving areas of temperature sensors, which can lead to reduced responsiveness and accuracy, especially when the sensor's mounting position deviates.
Innovation Solution
The stator design includes a bus bar with elongated sections and U-shaped bent parts that increase the heat receiving area for the temperature sensor, allowing it to be inserted through multiple gaps and contact additional surfaces, thereby enhancing heat absorption without increasing the bus bar width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the width of the bus bar is increased to increase the heat receiving area of the temperature sensor, then the measurement accuracy of the temperature is improved, but the size of the bus bar increases
Solution Approach 1:
The patent transitions from increasing the bus bar width (one dimension) to creating multiple bent parts that form gaps in different spatial arrangements. The temperature sensor is inserted through multiple gaps formed by first and second bent parts, utilizing three-dimensional spatial configuration rather than simply expanding the bus bar width, thereby increasing heat receiving area without increasing overall bus bar size
2Speed
If the heat receiving area of the temperature sensor is increased to improve measurement accuracy, then the responsiveness of temperature measurement is improved, but the complexity of the bus bar structure increases
Solution Approach 1:
The bus bar is segmented into multiple bent parts (first bent part and second bent part) that are provided side by side. Each bent part forms gaps that can retain the temperature sensor, creating multiple heat receiving positions. This segmentation allows the temperature sensor to receive heat from multiple locations simultaneously, improving responsiveness without requiring a single complex large-area 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 improves temperature measurement accuracy and responsiveness by increasing the heat receiving area of the temperature sensor, maintaining robustness even with slight deviations in mounting position and reducing the overall size of the bus bar.
Implementation Method 1
a temperature sensor that measures the temperature in the bus bar... a heat receiving area of a temperature sensor that receives heat from the bus bar
Data Source
AI summary
A first U-shaped part that is bent so as to form a pair of opposite surfaces facing each other, and a second U-shaped part that is bent so as to form a pair of opposite surfaces facing each other are provided side by side in a bus bar main body of a neutral conductor bus bar. One of the first pair of opposite surfaces and one of the second pair of opposite surfaces are located in the same plane, and the other of the first pair of opposite surfaces and the other of the second pair of opposite surfaces are located in the same plane. A temperature sensor is retained by being inserted through a gap between the first pair of opposite surfaces and a gap between the second pair of opposite surfaces.