Rotary Shaft Tip Sensor Layout for Accurate Rotation Detection
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Solution Overview
Problem
The accuracy of rotation parameter detection in rotary electric machines is compromised by vibrations generated during rotor rotation, and maintenance of detection systems is challenging due to their internal placement.
Innovation Solution
A rotary electric machine system with a rotation parameter detector positioned on the protruding tip of the rotating shaft, which is supported by bearings within the housing, allowing it to operate outside the housing and reducing vibration interference, facilitating easier maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the rotation parameter detector is disposed inside the housing, then the detection system is integrated with the rotary electric machine, but the detection accuracy deteriorates due to vibration interference from rotor rotation
Solution Approach 1:
The rotation parameter detector is extracted from the housing interior and relocated to the protruding tip of the rotating shaft. This separation removes the detector from the vibration-prone environment inside the housing, thereby improving measurement precision while maintaining functional integration through the shaft connection.
2Reliability
If the rotation parameter detector is disposed inside the housing, then the detection system is protected from external factors, but maintenance becomes difficult due to internal placement
Solution Approach 1:
By extracting the detector to the protruding tip of the rotating shaft, the system maintains protection through the structural integrity of the shaft while dramatically improving maintenance accessibility. The detector can now be accessed from outside the housing without disassembling the entire machine.
3Ease of repair
If the rotation parameter detector is disposed on the protruding tip of the rotating shaft outside the housing, then maintenance becomes easier, but the detector may be exposed to external environmental factors
Solution Approach 1:
The protruding tip of the rotating shaft serves as an intermediary structure that connects the protected internal environment with the external accessible location. The detector mounted on this tip benefits from both the structural support and partial protection of the shaft while maintaining external accessibility for maintenance.
Data Source
AI summary
A rotary electric machine system includes a rotary electric machine, a housing for housing the rotary electric machine, and a rotation parameter detector for detecting the rotation parameter of a rotating shaft constituting the rotary electric machine. The rotating shaft includes a first end portion and a second end portion, and a first bearing and a second bearing are provided between the housing and the first end portion, and between the housing and the second end portion, respectively. The first end portion includes a protruding tip that protrudes out of the housing through the first bearing. The rotation parameter detector is provided at the protruding tip.