Multi-Motor Drive Synchronization for Precise Control Phase Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive systems face challenges in enhancing the alignment property of multiple electric motors, which is crucial for efficient operation, especially in manufacturing processes like steel sheet rolling, where precise synchronization of motor control periods is necessary to maintain optimal alignment and conveyance speed.
Innovation Solution
A drive system comprising a master device and multiple drive devices, where the master device transmits identification information and synchronization signals to adjust the control periods of each drive device, ensuring synchronization with specific synchronization signals received multiple times, thereby aligning the phases of the control periods of the electric motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional drive systems are used to control multiple electric motors, then the basic motor control function is achieved, but the alignment property of the electric motors cannot be further enhanced
Solution Approach 1:
The control system is segmented into a master device that generates synchronization signals and individual drive devices that receive and process these signals. Each drive device independently adjusts its control period phase based on received synchronization signals, enabling distributed synchronization without requiring a fully centralized control architecture.
Solution Approach 2:
The system implements feedback mechanisms where drive devices monitor their control period phases and adjust them based on synchronization signals from the master device. The feedback loop continuously compares the actual phase with the target phase and makes real-time adjustments to maintain alignment.
2Reliability
If the control periods of multiple drive devices are synchronized, then the alignment property is improved, but the system requires complex synchronization mechanisms
Solution Approach 1:
The master device generates periodic synchronization signals at regular intervals, and each drive device periodically adjusts its control period phase based on these signals. This periodic action creates a rhythm of synchronization that maintains alignment without requiring continuous complex intervention.
Solution Approach 2:
The master device transmits synchronization signals in advance of the actual control actions, allowing drive devices to pre-adjust their control period phases before executing motor control commands. This preliminary synchronization ensures alignment is established before critical control operations.
3Measurement precision
If multiple synchronization signals are transmitted for each control period, then the alignment precision is enhanced, but the communication load increases
Solution Approach 1:
Instead of transmitting identical synchronization signals to all drive devices, the system transmits different synchronization signals tailored to each drive device's specific requirements and position in the control sequence. Each drive device receives synchronization information optimized for its local context, improving precision without unnecessary redundant communication.
Data Source
AI summary
A master device of a drive system transmits identification information of each first period and a first transmission synchronization signal for each first period of a reference period. A first controller adjusts a phase of each first control period such that the first control period is synchronized with a timing associated with a specific first synchronization signal. A second controller adjusts a phase of each second control period such that the second control period is synchronized with a timing associated with a specific second synchronization signal.