Rotating Electrical Machine Control Apparatus Abnormality Detection
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Solution Overview
Problem
Existing rotating electrical machine control systems face difficulties in accurately obtaining the rotation position due to wiring errors and other abnormalities, which complicates the control of rotating electrical machines and increases manufacturing costs when abnormality detection devices are integrated with position information generators.
Innovation Solution
A rotating electrical machine control apparatus that includes a position information generator and a controller, where the position information generator updates and outputs position information based on absolute and incremental signals, and the controller determines abnormalities by comparing pre- and post-reset position information, allowing for efficient detection and correction of errors without increasing system complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an abnormality detection device is provided in the position information generator, then the reliability of position information is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The abnormality detection function is extracted from the position information generator and implemented as a separate determination device in the control apparatus. This separation allows the position information generator to remain simple while the control apparatus performs the abnormality detection by comparing position information before and after reset requests, thus improving reliability without increasing the complexity of the position information generator itself.
2Reliability
If wiring error detection is implemented, then the reliability of rotation position acquisition is improved, but the system complexity increases
Solution Approach 1:
The system performs self-diagnosis by having the control apparatus issue reset requests and compare the position information before and after the reset. This self-service mechanism allows the system to detect wiring errors and other abnormalities automatically without requiring additional external detection equipment, thus improving reliability while minimizing system complexity.
Data Source
AI summary
A rotating electrical machine control apparatus includes a position information generator and a controller, where a reset request is given from the controller, the position information generator stores position information in accordance with a first signal indicating the rotation position of a rotating electrical machine in a position storage portion, and thereafter updates the position information stored in the position storage portion on the basis of a second signal. The controller gives a reset request to the position information generator, and determines an abnormality of the position information on the basis of the position information obtained before and after the reset request is given.