Motor Parameter Tracking for Stable Current Under Temperature Drift
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Solution Overview
Problem
Motor parameters such as resistance and inductance change due to heat generation, leading to decreased control accuracy and increased heating, which existing solutions like limiting current output or physical cooling fail to address effectively.
Innovation Solution
A parameter control system that includes a current acquisition circuit, an arithmetic processor to adjust motor parameters based on current differences, and an output circuit to stabilize output current by automatically tracking temperature changes, thereby improving control accuracy and reducing heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If physical cooling is performed on the motor, then heat generation is reduced, but costs increase and constant temperature cannot be guaranteed
Solution Approach 1:
The patent changes the electrical parameters (resistance and inductance) of the motor model to compensate for temperature effects. Instead of physically cooling the motor, the system dynamically adjusts these parameters based on detected temperature changes, thereby maintaining control accuracy without adding complex cooling equipment.
2Loss of energy
If current output capacity of the frequency converter is limited, then heat generation is reduced, but the frequency converter cannot output rated power
Solution Approach 1:
The patent dynamically adjusts the resistance and inductance parameters of the motor model based on temperature detection. This allows the system to maintain accurate control and optimize current distribution, enabling the frequency converter to output rated power while reducing excessive heat generation through improved control efficiency.
3Measurement precision
If motor parameters are not adjusted for temperature changes, then control accuracy decreases, but adjusting parameters increases system complexity
Solution Approach 1:
The patent implements a feedback mechanism where the system detects temperature changes and automatically adjusts the motor parameters (resistance and inductance) accordingly. This closed-loop approach maintains high control accuracy by continuously adapting parameters to current operating conditions without requiring complex manual intervention.
Solution Approach 2:
The system performs self-adjustment of motor parameters based on detected temperature changes. The control device automatically modifies resistance and inductance values without external intervention, enabling the system to maintain optimal performance and control accuracy through self-service parameter adaptation.
Data Source
AI summary
The present disclosure provides a parameter control system for a motor, comprising: a current acquisition circuit connected to the motor, so as to acquire a current output by the motor; an arithmetic processor configured to determine whether to adjust a parameter of the motor according to the current acquired, and generate a new parameter when it is determined to adjust the parameter of the motor; and an output circuit configured to output the new parameter generated by the arithmetic processor to a control device of the motor. The present disclosure also provides a motor including the parameter control system.