Coil Temperature Sensor Bracket for Vibration-Stable Motor Mounting
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Solution Overview
Problem
Temperature sensors used to detect the temperature of coils in rotary electric machines face challenges in maintaining their position and preventing detachment due to vibrations and external forces.
Innovation Solution
A temperature sensor design featuring a sensor element with a thermosensitive body and electric wires, enclosed by an elongated covering body, and a bracket with a fixed portion and a supporting portion that elastically presses the sensor element against the coil, ensuring stable positioning and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a temperature sensor is inserted into a gap between coils using an elastic holder, then the sensor can be easily installed and initially positioned, but the sensor shifts or detaches from the coil under vibration and external forces
Solution Approach 1:
The bracket is designed with elastic deformation capability, transitioning from a first posture during insertion to a second posture during operation. This dynamic behavior allows easy installation while maintaining reliable sensor positioning through elastic recovery force that presses the sensor against the coil, preventing detachment under vibration.
Solution Approach 2:
The physical state of the bracket changes from a flexible insertion mode to a rigid supporting mode through elastic deformation. The bracket's flexibility parameter allows it to deform during insertion, then it maintains a stable pressed position during operation, resolving the contradiction between ease of installation and position stability.
2Stability of the object's composition
If the bracket is made rigid for stable positioning, then the sensor position is stable during insertion, but the bracket cannot adapt to the gap and press the sensor firmly against the coil
Solution Approach 1:
The bracket transitions from a flexible state during insertion to a rigid state during operation. This dynamic rigidity allows the bracket to adapt to the gap dimensions during insertion, then maintain stable positioning and firm pressing force against the coil during operation, resolving the contradiction between adaptability and stability.
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 effectively prevents the temperature sensor from shifting or detaching from the coil, allowing for accurate and stable temperature detection even under conditions of vibration and impact.
Implementation Method 1
a supporting portion pressing the sensor element against the coil while elastically supporting one end of the sensor element in the longitudinal direction
Data Source
AI summary
A temperature sensor detecting a temperature of a coil provided in a stator of a rotary electric machine includes: a sensor element including a thermosensitive body, electric wires electrically connected to the thermosensitive body, and an elongated covering body enclosing a part of the electric wires and the thermosensitive body, and configured to be inserted into a gap formed by the coil along a longitudinal direction of the covering body; and a bracket including a fixed portion to be fixed to the stator, and a supporting portion pressing the sensor element against the coil while elastically supporting one end of the sensor element in the longitudinal direction.