Rotary Electric Machine Control Device Abnormality Detection
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Solution Overview
Problem
Existing rotary electric machine control devices primarily monitor for excessive current deviations but fail to adequately detect abnormalities in systems due to simplified configurations, leading to potential operational issues.
Innovation Solution
A rotary electric machine control device with multiple inverter circuits, power supply relays, and controllers that monitor and manage abnormalities across systems by acquiring and analyzing power supply relay information through signal lines, enabling appropriate power supply management and preventing erroneous determinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple inverter circuits and controllers are used to control multiple winding sets, then the control capability and functionality are improved, but the device complexity and difficulty of monitoring abnormalities increase
Solution Approach 1:
Each controller is designed to perform multiple functions: monitoring its own subject system and simultaneously monitoring different systems through signal lines. This multi-functionality allows the system to handle complex multi-winding control while using standardized monitoring mechanisms across all controllers, reducing overall system complexity despite increased adaptability.
Solution Approach 2:
The system divides the control and monitoring functions into separate modular controllers, each responsible for specific winding sets. This segmentation allows independent monitoring of each system while maintaining overall system coordination, making the complex multi-winding control more manageable and less error-prone.
2Reliability
If comprehensive monitoring of different systems is implemented through signal lines, then the reliability of abnormality detection is improved, but the device complexity increases
Solution Approach 1:
Controllers acquire power supply relay information from different systems through signal lines, creating a feedback mechanism where each controller has visibility into the state of other systems. This feedback enables comprehensive abnormality detection without requiring a separate centralized monitoring system, as each controller contributes to and benefits from the collective monitoring network.
Solution Approach 2:
The monitoring functions for multiple systems are merged into the existing controllers rather than adding separate monitoring devices. Each controller combines subject system monitoring with different system monitoring capabilities, reducing overall device complexity while improving reliability through comprehensive coverage.
3Reliability
If power supply relays are turned off immediately upon detecting abnormalities, then the safety and reliability are improved, but the loss of time for system response increases
Solution Approach 1:
Controllers continuously acquire power supply relay information from different systems through signal lines before abnormalities occur. This preliminary monitoring allows the system to detect abnormalities at their earliest stages, enabling timely responses that balance safety requirements with minimal operational disruption. The advance awareness provided by cross-system monitoring reduces the time needed to respond when abnormalities do occur.
Data Source
AI summary
A rotary electric machine control device for controlling a rotary electric machine having multiple winding sets includes multiple inverter circuits, multiple power supply relays, and multiple controllers provided for respective systems. Each of the controllers is configured to monitor an abnormality of a subject system and an abnormality of a different system and is configured to turn off a power supply relay in the subject system when an abnormality requiring a power supply stop occurs in the subject system. Each of the controllers is further configured to acquire power supply relay information related to a state of the power supply relay of the different system through a signal line, and is configured to monitor the abnormality of the different system based on the power supply relay information.