Motor Control Device Speed Calibration via Reference Measuring Values
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Solution Overview
Problem
Conventional motor control devices struggle to accurately control motor revolution speed due to manufacturing deviations and environmental changes, leading to inefficiencies in motor operation.
Innovation Solution
A motor control device with a recording module and controlling module that measures and records reference revolution speed signals to adapt the motor's operation environment, allowing for precise control and improved efficiency by updating the revolution speed table with reference measuring values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the revolution speed table is preset in the recording unit during manufacturing, then the control device structure is simple, but the control precision deteriorates when environmental conditions change or manufacturing deviations occur
Solution Approach 1:
The patent applies preliminary action by pre-calibrating the revolution speed table with reference measuring values obtained under actual operating conditions before the motor is put into service. This calibration process adjusts the predetermined revolution speed values to compensate for manufacturing deviations and environmental factors, ensuring accurate speed control without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The patent changes the parameters in the revolution speed table from fixed predetermined values to calibrated reference measuring values that reflect actual operating conditions. By adjusting these parameters based on measured deviations during calibration, the system achieves precise speed control while maintaining a simple overall structure.
2Ease of manufacture
If the revolution speed table is fixed and cannot be modified, then the recording unit can be implemented with read only memory, but the adaptability to environmental changes deteriorates
Solution Approach 1:
The patent performs preliminary calibration to generate accurate reference measuring values before the motor operates in its final application. These calibrated values are then stored in the recording unit, combining the manufacturing simplicity of pre-programmed tables with the adaptability to specific operating conditions through pre-obtained reference measurements.
Solution Approach 2:
The patent incorporates a feedback mechanism during the calibration process where the controller measures actual motor revolution speed and compares it with target speeds. This feedback information is used to generate corrected reference measuring values that compensate for manufacturing deviations and environmental factors, which are then stored for future operation.
3Ease of manufacture
If the revolution speed table values are predetermined without calibration, then the manufacturing process is simple, but the motor operation efficiency deteriorates due to speed control inaccuracy
Solution Approach 1:
The patent performs speed calibration as a preliminary action during or after manufacturing but before the motor is put into final service. This calibration process establishes accurate reference measuring values in the revolution speed table, ensuring optimal motor efficiency without requiring complex manufacturing processes or specialized equipment.
Solution Approach 2:
The patent enables the motor control system to perform self-calibration by measuring its own revolution speed and generating accurate reference measuring values. This self-service approach improves motor operation efficiency through accurate speed control while keeping the manufacturing process simple and accessible.
Data Source
AI summary
A motor control device includes a recording module and a controlling module. The recording module has a revolution speed table recording a plurality of predetermined revolution speed values. The controlling module receives a reference revolution speed control signal and measures the reference revolution speed control signal to correspondingly generate a reference measuring value. The recording module records the reference measuring value corresponding to one of the predetermined revolution speed values in the revolution speed table.