EPS Motor Steering Angle Sensor Integration
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Solution Overview
Problem
The existing electronic power steering systems require a separate steering angle sensor, which increases assembly complexity, space requirements, and costs due to additional parts.
Innovation Solution
An EPS motor with an integrated steering angle sensor, where the sensor is housed within the motor's structure, including a substrate, worm gear, and hall sensors, allowing for reduced part count and streamlined assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate steering angle sensor is mounted around the steering wheel, then the steering angle can be detected, but additional space is required and the number of parts increases
Solution Approach 1:
The steering angle sensor is integrated into the EPS motor housing, merging two separate components (sensor and motor) into a single unified structure. This eliminates the need for a separate sensor mounting around the steering wheel, reducing the number of parts while maintaining steering angle detection capability
Solution Approach 2:
The EPS motor housing is designed to serve multiple functions: it houses the motor components and simultaneously accommodates the steering angle sensor. This multi-functional design allows the same structure to perform both motor housing and sensor mounting roles, reducing overall system complexity
2Measurement precision
If a separate steering angle sensor is mounted around the steering wheel, then the steering angle can be detected, but the assembly process becomes more complex
Solution Approach 1:
By integrating the sensor into the motor housing, the assembly process is simplified from mounting separate components to installing a single integrated unit. This reduces the number of assembly steps and potential error points in the manufacturing process
3Measurement precision
If a separate steering angle sensor is mounted around the steering wheel, then the steering angle can be detected, but additional space around the steering wheel is required
Solution Approach 1:
The sensor is relocated from the steering wheel area to the EPS motor housing, consolidating the detection function within the existing motor structure. This eliminates the need for additional space around the steering wheel while maintaining detection accuracy
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 integration simplifies the assembly process, reduces costs, and enhances design flexibility by eliminating the need for a separate sensor, thereby improving the system's price competitiveness and operational efficiency.
Implementation Method 1
a first hall sensor provided at a position on the substrate corresponding to the first magnet member
Implementation Method 2
a second hall sensor spaced apart from the substrate by a predetermined distance and provided at a position corresponding to the second magnet member
Data Source
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AI summary
Disclosed is an EPS motor (11) having a steering angle sensor (100) for an electronic power steering system, wherein the EPS motor includes a housing (1), a bracket (2), a rotating shaft (3), a stator (4) and a rotor (5), and the housing includes an upper housing (1a) having the stator (4) and the rotor (5) in an internal space thereof, the bracket (2) coupled to an upper portion thereof, and the rotating shaft (3) coupled to the upper housing (1a) to protrude downwards therefrom, and a lower housing (1b) disposed under the upper housing to receive the steering angle sensor (100) therein.