Variable Frequency Drive Control Loop Monitoring With KPI Feedback
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Solution Overview
Problem
Industrial control loops often experience malfunctions leading to poor control of process variables, and existing monitoring systems lack the capability to provide comprehensive and accurate performance data for effective control adjustments.
Innovation Solution
A variable frequency drive equipped with control loop performance monitoring algorithms that input data on process variables, target values, and controller inputs, calculate key performance indicators, and adjust controller parameters to improve control loop performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If control loop performance monitoring is implemented using existing systems, then basic monitoring capability is provided, but comprehensive and accurate performance data for effective control adjustments is lacking
Solution Approach 1:
The patent combines multiple monitoring functions and data processing capabilities into a single integrated control loop performance monitoring system. The system merges data collection from multiple sources, real-time analysis, and control adjustment recommendations into one unified platform, thereby improving measurement precision without proportionally increasing device complexity.
Solution Approach 2:
The monitoring system is designed to perform multiple functions including data collection, real-time analysis, performance evaluation, and control adjustment recommendations. This multi-functional approach allows the system to provide comprehensive performance data while avoiding the need for separate specialized devices for each function.
2Reliability
If real-time control adjustments are made based on performance monitoring, then control loop performance is improved, but system complexity and computational requirements increase
Solution Approach 1:
The system implements continuous feedback loops that monitor control loop performance in real-time and automatically generate adjustment recommendations. The feedback mechanism processes performance data, compares it against target values, and triggers control adjustments when deviations are detected, thereby improving reliability while managing system complexity through automated decision-making algorithms.
Solution Approach 2:
The control loop performance monitoring system automatically monitors its own performance, detects issues, and generates adjustment recommendations without requiring constant external intervention. This self-service capability improves control loop reliability while reducing the operational complexity for users.
Data Source
AI summary
Disclosed is a method for control loop performance monitoring in a variable frequency drive. A set of data is inputted to one or more control loop performance monitoring algorithms comprised in the variable frequency drive, wherein the set of data comprises at least a measured value of a process variable, a target value for the process variable, a set of controller input parameters, and a controller output. An output from each of the one or more control loop performance monitoring algorithms is obtained based at least partly on the set of data. One or more key performance indicator values indicative of control loop performance are determined based at least partly on the output from each of the one or more control loop performance monitoring algorithms. The set of controller input parameters is adjusted based at least partly on the one or more key performance indicator values.