Compact Temperature Sensor for Electric Vehicle Coils
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Solution Overview
Problem
In rotating machines, especially electric vehicles, there is insufficient space to accommodate two separate temperature sensors for detecting the temperature of different coils, as existing sensors are too bulky and occupy valuable space.
Innovation Solution
A compact temperature sensor design that consolidates two coil elements into a single sensor assembly, using a housing with a resin mold to house both coil elements and a thermosensitive body, allowing for efficient space utilization and improved vibration resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate temperature sensor assemblies are provided for detecting temperature of different coils, then temperature measurement capability is improved, but occupied space increases
Solution Approach 1:
The patent combines two separate temperature sensor assemblies into a single integrated sensor assembly that can detect temperatures of multiple coils simultaneously. The sensor assembly includes a housing with multiple sensor elements positioned to contact different coil elements, thereby reducing the number of separate assemblies needed and saving installation space while maintaining the capability to monitor multiple coil temperatures.
Solution Approach 2:
The temperature sensor assembly is designed with multi-functional capability to detect temperatures of multiple different coils using a single assembly. The housing contains multiple thermosensitive bodies that can simultaneously monitor temperature across different coil elements, making one sensor assembly universal for multiple measurement tasks rather than requiring separate dedicated sensors for each coil.
2Volume of moving object
If a compact temperature sensor design is used to save space, then occupied space is reduced, but vibration resistance may deteriorate
Solution Approach 1:
The sensor assembly incorporates vibration-resistant design features and protective structures within the housing to cushion and protect the thermosensitive bodies from vibration damage. The housing design includes mounting structures and positioning features that secure the sensor elements firmly, preventing them from loosening or damaged under vibrational stress, thereby maintaining reliability in the compact configuration.
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
The solution reduces the occupied space, enhances vibration resistance, and allows for accurate temperature detection of both coils, even in space-constrained environments, by integrating the sensor assembly for both coils into a single unit.
Implementation Method 1
A part of the thermosensitive body exposed from the housing chamber comes into contact with a surface of the coil element
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A temperature sensor 1 according to the present invention includes a first coil element 11 and a second coil element 12 both serving as a part of a coil of an electric apparatus, an element main body 53 that includes a thermosensitive body 54 detecting temperature of the first coil element 11 and temperature of the second coil element 12 and a pair of extraction wires 56 and 56 connected to the thermosensitive body 54, and a housing 25 that includes an electric insulating resin material and is configured to house and hold the first coil element 11, the second coil element 12, and the element main body 53.