Motor Device Rotation Detection Unit Nesting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor devices in electric brake systems are bulky due to the placement of rotation detection units away from the motor rotation shaft, leading to increased size and potential electromagnetic interference.
Innovation Solution
A motor device configuration with a stator and rotor, where the rotation detection unit is placed between the drawn connection lines and the motor rotation shaft, and a guide member facilitates the drawing of terminal lines, allowing for miniaturization and electromagnetic shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the rotation detection unit is placed away from the motor rotation shaft, then the detection function is achieved, but the device size increases
Solution Approach 1:
The rotation detection unit is nested within the space between the drawn connection lines and the motor rotation shaft, utilizing the existing spatial configuration rather than adding external components. This nesting approach allows the detection unit to be integrated into the motor's internal structure, achieving rotation detection functionality without increasing the overall device volume.
Solution Approach 2:
The connection lines are drawn around in a circular pattern around the motor rotation shaft, creating a three-dimensional spatial arrangement. The rotation detection unit is positioned in the space created by this circular drawing pattern, effectively utilizing the radial and axial dimensions to accommodate the detection unit without increasing the motor's external footprint.
2Measurement precision
If the rotation detection unit is placed away from the motor rotation shaft, then the detection function is achieved, but electromagnetic interference increases
Solution Approach 1:
The drawn connection lines act as an intermediary structure that both conducts electricity and creates a spatial barrier. By positioning the rotation detection unit in the space between these drawn lines and the motor shaft, the connection lines serve as a physical and electromagnetic shield, reducing interference between the high-current connection lines and the sensitive detection unit.
3Reliability
If terminal lines are drawn around without guidance, then electrical connection is achieved, but device volume increases
Solution Approach 1:
The connection lines are drawn around in a predetermined circular pattern before the rotation detection unit is installed. This preliminary arrangement of connection lines creates a defined spatial structure that guides the subsequent placement of the detection unit, ensuring optimal space utilization and preventing volume increase.
Solution Approach 2:
The connection lines are made flexible and drawn in a circular pattern that can adapt to the spatial constraints of the motor housing. This dynamic arrangement allows the electrical connections to be made while maintaining a compact configuration, and the same spatial arrangement subsequently accommodates the rotation detection unit without requiring additional space.
Data Source
AI summary
A motor device includes a motor body having a stator and a rotor, and an EDU for controlling the motor body. A hydro unit is disposed between the motor body and the EDU (Electric Driver Unit). In the motor body, a plurality of terminal lines for energizing the coil of the stator and the EDU is drawn around, and a rotation detection unit for detecting the rotation of the rotor is provided a space formed between the plurality of drawn terminal lines and the rotation shaft of the motor.