Motor Control Loop Debugging for External Frequency Response Measurement
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Solution Overview
Problem
The integration of a frequency characteristics measurement function into motor control devices can lead to resource constraints, such as memory capacity, resulting in increased product costs.
Innovation Solution
A motor control system is configured with a motor control device and an external debug device. The external debug device includes a disturbance signal superimposer and a frequency characteristics deriver, allowing for the measurement of frequency characteristics without the need for costly equipment like a frequency response analyzer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a frequency characteristics measurement function is integrated into the motor control device, then measurement capability is improved, but device complexity and product cost increase
Solution Approach 1:
The frequency characteristics measurement function is extracted from the motor control device and relocated to an external debug device. The motor control device retains only the essential control functions, while the external debug device performs frequency characteristics measurement by injecting disturbance signals and analyzing control loop responses, thereby reducing device complexity and product cost of the motor control device while maintaining measurement capability.
2Measurement precision
If a frequency characteristics measurement function is integrated into the motor control device, then measurement capability is improved, but memory capacity and resources are constrained
Solution Approach 1:
The measurement function requiring significant memory resources is extracted from the motor control device and implemented in the external debug device. This extraction eliminates the memory capacity constraints that would otherwise be imposed on the motor control device, allowing it to allocate resources efficiently for primary control functions while measurement capabilities are provided externally.
3Measurement precision
If costly measurement equipment like frequency response analyzer is used, then measurement precision is improved, but product cost increases
Solution Approach 1:
An external debug device serves as an intermediary between the motor control device and the measurement analysis process. This intermediary injects disturbance signals into the control loop and analyzes the responses to derive frequency characteristics, providing measurement precision comparable to expensive equipment like frequency response analyzers while significantly reducing product cost by using standard debug device components rather than specialized measurement equipment.
Data Source
AI summary
The present disclosure relates to a motor control system including: a motor control device, including a semiconductor integrated circuit having a memory and forming a control loop for a motor so as to control a drive of the motor; and an external debug device, externally connected to the motor control device and accessible to the memory in the motor control device. The external debug device includes a disturbance signal superimposer and a frequency characteristics deriver. The interference signal superimposer generates a disturbance signal for the control loop and superimposes the disturbance signal on a signal generated in the control loop. The frequency characteristics deriver derives frequency characteristics of the control loop based on the signal generated in the control loop by superimposition.