Motor Speed Graph Monitoring for Overheating Margin Visibility
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Solution Overview
Problem
Existing motor monitoring systems only estimate the time until overheating, making it difficult to understand the motor's operational safety and margin, especially when adjusting settings for efficient machining.
Innovation Solution
A motor monitoring device that includes a rotation number acquisition unit, a history information storage unit, and a graph display unit, which plots the rotation number over time and changes marker modes based on predetermined indices, allowing for easy understanding of the motor's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only the time until overheating is estimated, then the overheating risk can be predicted, but the motor's operational safety and margin cannot be easily understood
Solution Approach 1:
The invention transitions from a one-dimensional time-to-overheating estimate to a two-dimensional visualization where the vertical axis represents rotation number and the horizontal axis represents time. This dimensional expansion allows simultaneous display of both the overheating risk (through marker mode changes) and the operational context (rotation number trajectory), thereby preserving operational safety information while maintaining overheating prediction capability.
Solution Approach 2:
The invention uses color and mode changes of markers on the graph to encode different operational states and safety margins. By changing marker modes according to a predetermined index (such as temperature proximity to overheating threshold), the system conveys rich safety information visually without requiring additional text or numerical displays, thus resolving the information loss problem.
2Productivity
If motor speed is adjusted to maximize efficient machining, then productivity increases, but the margin for overheating decreases
Solution Approach 1:
The graph display unit provides real-time visual feedback by plotting rotation number over time and changing marker modes based on temperature proximity to overheating thresholds. This feedback mechanism allows operators to immediately see the relationship between speed settings and thermal safety margin, enabling them to adjust speed to maximize productivity while maintaining adequate overheating margin.
3Loss of information
If a detailed graph with multiple parameters is displayed, then comprehensive motor state information is provided, but the ease of understanding the motor state decreases
Solution Approach 1:
The invention encodes multiple motor state parameters into the visual appearance of markers on a simple time-rotation number graph. By changing marker modes (color, shape, size) according to a predetermined index that reflects temperature and safety margin, the system presents comprehensive motor state information in an intuitively understandable visual format, avoiding the complexity of multiple separate gauges or numerical displays.
Data Source
AI summary
A motor-monitoring device according to one embodiment of the present disclosure, which allows easy ascertaining of the status of a motor, comprises: a rotation speed acquisition unit that acquires the rotation speed of a motor operating according to an operating program; a history information storage unit that stores history information including the rotation speed at fixed time intervals; and a graph display unit that plots markers indicating the rotation speed in a graph region with one axis used for time and the other axis for rotation speed, the graph display unit changing the mode of the marker according to a prescribed index.