Synchronous Machine Controller Failure Detection During Rotation
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Solution Overview
Problem
Existing synchronous machine controllers face difficulties in detecting and addressing failures of the current detection part when the synchronous machine is rotating, as existing methods require the servo motor to be stopped.
Innovation Solution
A synchronous machine controller that includes a variable voltage application part, rotor position detection, current detection parts, open-loop control, closed-loop control, and a current detection part failure detection mechanism, allowing for the detection of current detection part failures while the machine is rotating and switching between open-loop and closed-loop control to maintain operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current detection part failure detection method based on stopped servo motor is used, then the failure detection is simple and reliable, but the failure cannot be detected when the servo motor is rotating
Solution Approach 1:
The patent makes the control mode dynamic by switching between open-loop control and closed-loop control based on the rotational state of the synchronous machine. When the machine is rotating, the system operates in open-loop control mode where failure detection is performed without requiring the machine to stop, thus achieving dynamic adaptability to different operational states while maintaining reliable failure detection capability
Solution Approach 2:
The patent changes the control parameter mode (open-loop vs closed-loop) based on the operational state. In open-loop control mode, the system can detect current detection part failures during rotation by monitoring current values without requiring the machine to stop, thereby changing the operational parameters to enable failure detection across different states
Data Source
AI summary
When a failure of current detection parts occurs while a synchronous machine is operating, the failure of the current detection parts is detected and the operation of the synchronous machine is continued. An open-loop control part for performing control without using the detected current values of the current detection parts and a closed-loop control part for performing control using the detected current values are included, and a failure of the current detection parts is detected while the open-loop control part is operating.