Dual-Winding Steering Motor Control for Output and Torque Ripple
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Solution Overview
Problem
In steering motors with dual windings, failures in some windings lead to reduced output and increased torque ripple when both normal and failed windings are driven.
Innovation Solution
A steering motor control device and method that determines output distribution information based on requested and reference output information, and adjusts control information for normal and failed windings to maintain high output and reduce torque ripple.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If both normal and failed windings are driven together, then output is increased, but torque ripple increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the output distribution ratio between normal and failed windings based on the requested output level. When requested output is high, more power is distributed to the failed winding to maximize total output. When requested output is low, less power is distributed to the failed winding to minimize torque ripple. This continuous parameter adjustment resolves the contradiction between maximizing output and minimizing torque ripple.
2Object-generated harmful factors
If only normal windings are driven, then torque ripple is reduced, but output is limited to half of maximum
Solution Approach 1:
The patent applies partial action by selectively engaging the failed winding only when necessary (when requested output exceeds the capacity of normal windings alone). Instead of always using both windings or never using the failed winding, the system partially utilizes the failed winding based on the demand level, thus achieving high output when needed while avoiding torque ripple when the failed winding is not engaged.
3Productivity
If output distribution is optimized for high output, then actual output increases, but torque ripple control deteriorates
Solution Approach 1:
The patent applies dynamics by making the output distribution ratio a dynamic variable that changes continuously with the requested output level. The determiner calculates an optimal distribution ratio in real-time based on current operating conditions. This dynamic adjustment allows the system to adapt to varying demands, maximizing actual output when high power is needed while maintaining torque ripple control when lower power levels are sufficient.
Data Source
AI summary
The embodiments relate to a steering motor control device and method. An embodiment may provide a steering motor control device for controlling a steering motor including a first winding and a second winding including a receiver for receiving requested output information on an output of the steering motor, a determiner configured to, if one of the first winding and the second winding is determined to fail, determine output distribution information based on the requested output information and predetermined reference output information, and determine normal winding control information and faulty winding control information based on the output distribution information, and a controller for controlling an operation of the normal winding and an operation of the failed winding.