Diagnostic Apparatus for Electric Drive Force Oscillation Detection
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Solution Overview
Problem
Existing power conversion and diagnostic systems for electric drive objects, such as pumps, struggle to effectively detect irregularities in drive force oscillations across varying operating speeds, leading to potential operational failures and inefficiencies.
Innovation Solution
A diagnostic apparatus and power conversion apparatus that acquire time series force data, set oscillation thresholds based on operating speed, and identify irregularities by determining if the force oscillation level exceeds these thresholds, with the threshold increasing as the operating speed increases, allowing for real-time monitoring and detection of anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed oscillation threshold is used for all operating speeds, then the diagnostic system is simple to implement, but detection sensitivity varies across different speed ranges leading to false positives or missed detections
Solution Approach 1:
The oscillation threshold is made dynamic by automatically adjusting it based on the detected operating speed of the drive object. The control circuitry stores multiple threshold values corresponding to different speed ranges and selects the appropriate threshold based on real-time speed detection, allowing the diagnostic system to adapt to varying operating conditions without manual reconfiguration.
Solution Approach 2:
The system changes the threshold parameter according to the operating speed parameter. By establishing correspondence between speed ranges and threshold values, the system optimizes detection sensitivity for each operating condition while maintaining a unified diagnostic framework that automatically adapts to different speeds.
2Reliability
If environment-specific settings are implemented for different operating conditions, then detection accuracy improves for each specific condition, but the system requires complex configuration and multiple settings
Solution Approach 1:
The diagnostic system performs self-configuration by automatically detecting the operating speed and selecting the appropriate oscillation threshold from stored values. This eliminates the need for manual environment-specific settings while maintaining optimized detection accuracy for each operating condition, as the system serves itself by adapting to its current state.
Solution Approach 2:
A single diagnostic system handles multiple operating conditions universally by incorporating speed-dependent threshold selection. The control circuitry is designed to work across the full operating range of the drive object, automatically adjusting parameters to maintain reliable detection without requiring separate configurations for different environments or speed ranges.
Data Source
AI summary
A diagnostic apparatus for an electric drive object that generates a drive force in response to receiving electric power, the diagnostic apparatus includes a circuitry configured to: acquire time series force data associated with the drive force; identify a force oscillation level associated with the drive force based on the force data; set an oscillation threshold at a first level when the drive object operates at a first speed and set the threshold at a second level higher than the first level when the drive object operates at a second speed higher than the first speed; and identify an irregularity of the drive object in response to determining that the force oscillation level exceeds the oscillation threshold.