Retaining Plate Sensor Mounting for Rotary Electric Machine
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Solution Overview
Problem
The existing adjustment systems for angular position sensors in rotating electrical machines are bulky and difficult to mount, compromising the compactness and assembly efficiency of the machines.
Innovation Solution
A rotating electrical machine design featuring a retaining plate that applies a predetermined locking torque to secure the angular position sensor between a bearing and the plate, allowing for easier mounting and adjustment while withstanding vibrations, and incorporating a locking system to prevent unauthorized position modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a bulky adjustment system is used for the angular position sensor, then the sensor can be adjusted for angular position, but the device complexity and mounting difficulty increase
Solution Approach 1:
The adjustment system is segmented into a simple retaining plate with a through-hole and a separate adjustment tool. The retaining plate provides the mounting structure while the adjustment tool (with L-shaped or T-shaped engagement features) provides the adjustment capability. This segmentation eliminates bulky integrated adjustment mechanisms while maintaining full adjustment functionality.
Solution Approach 2:
The retaining plate acts as an intermediary element between the sensor and the mounting structure. It provides a simple interface that accepts the sensor and allows angular adjustment through a through-hole, while the adjustment tool serves as an intermediary for applying adjustment torque. This intermediary approach simplifies both the mounting structure and the adjustment mechanism.
2Reliability
If the retaining plate applies strong locking torque to withstand vibrations, then the sensor positioning stability improves, but the difficulty of adjusting the sensor position increases
Solution Approach 1:
The locking mechanism is made dynamic rather than static. The retaining plate applies strong locking torque during normal operation to ensure stability, but the adjustment tool can temporarily overcome this torque to enable adjustment. After adjustment, the locking torque is re-established. This dynamic approach allows the system to switch between stable operation and adjustable states as needed.
Solution Approach 2:
The adjustment tool is designed to apply preliminary adjustment torque before the locking torque takes effect. The operator first uses the adjustment tool to position the sensor at the desired angle, and only after positioning is complete does the strong locking torque of the retaining plate engage to secure the sensor in its final position. This preliminary action sequence ensures both adjustability 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
This design enhances the compactness and facilitates the mounting of the angular position sensor, improving the assembly efficiency and ensuring secure positioning while allowing for precise adjustment and detecting unauthorized changes.
Implementation Method 1
said retaining plate applies a predetermined locking torque in rotation sufficient to withstand the vibrations of said rotating electrical machine
Implementation Method 2
at least one fixed sensor of the Hall effect type arranged close to the target. Under the effect of the rotation of the target together with the shaft, the magnetic field received by the sensor varies.
Data Source
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AI summary
The invention mainly relates to a rotary electric machine, in particular for a motor vehicle, comprising: - a rotor mounted on a shaft, - at least one bearing (18) having a central opening (60) for passage of said shaft, said bearing (18) comprising a through-housing (68); - at least one sensor (67) of the angular position of said rotor, said position sensor (67) being mounted around said shaft, characterised in that a retaining plate (77) is attached on said bearing (18) and comes into contact with a portion of said position sensor (67), such that said position sensor (67) is clamped between said bearing (18) and said retaining plate (77).