Tandem Motor Control for Speed Synchronization and Load Balancing
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Solution Overview
Problem
The control of motors with axes connected in tandem faces challenges such as high control costs, potential interference and oscillation between motors, and increased requirements for electromagnetic interference and anti-interference abilities.
Innovation Solution
A control method that employs a hybrid control algorithm to maintain an expected voltage output vector, an inverse closed-loop rotational speed algorithm for synchronization, an energy consumption balancing algorithm to balance load and energy, and an equity selection algorithm for fault resolution, thereby enhancing collaboration, fault detection, and reducing resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If motors with axes connected in tandem are used to achieve independent acceleration, deceleration and positioning control, then motion control accuracy and performance are improved, but control cost increases due to more motors and motor controllers being needed
Solution Approach 1:
The patent combines multiple motor control functions into a unified control system that manages tandem motors through integrated algorithms. The hybrid control algorithm merges voltage space vector control with rotational speed synchronization control, allowing multiple motors to be controlled through a coordinated system rather than independent controllers, thereby reducing overall system complexity and cost while maintaining high precision motion control.
2Reliability
If motors with axes connected in tandem are controlled to achieve precise motion control, then control accuracy and stability are improved, but interference and oscillation between motors may occur
Solution Approach 1:
The patent implements feedback mechanisms through the inverse closed-loop rotational speed algorithm, which continuously monitors the rotational speed of each motor and adjusts control signals to eliminate speed deviations. This feedback control prevents oscillation and interference between motors by dynamically compensating for disturbances and maintaining synchronized operation, thereby ensuring control stability.
3Adaptability or versatility
If each motor has an independent controller to achieve precise control, then motion control flexibility is improved, but requirements for electromagnetic interference and anti-interference ability increase
Solution Approach 1:
The patent develops a universal control algorithm that can manage multiple tandem motors through a single integrated control strategy. The hybrid control system performs multiple functions including voltage control, speed synchronization, and fault detection within one control framework, reducing the number of independent controllers needed and thereby minimizing electromagnetic interference while maintaining control flexibility through software-based adaptability.
4Productivity
If motors with axes connected in tandem operate to achieve high performance control, then productivity is improved, but energy consumption increases
Solution Approach 1:
The patent employs dynamic control strategies through the energy consumption balancing algorithm that continuously adjusts motor operating parameters based on real-time load conditions and performance requirements. The system dynamically optimizes voltage and current delivery to each motor, ensuring high productivity when needed while reducing energy consumption during lower-demand periods, thereby achieving a balance between performance and energy efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly improves the collaboration and fault detection capabilities of tandem motors, reduces resource consumption costs, and enhances the overall control accuracy and stability.
Implementation Method 1
a rotary transformer is utilized to acquire the basic parameters of each motor, and the basic parameters include an angular displacement, an angular velocity, a rotational speed and a phase current of a rotating shaft
Data Source
AI summary
The present disclosure discloses a control method of tandem motors, relating to the technical field of motor control and solving problems of rotational speed synchronization, energy consumption and emergency protection of motors with axes connected in tandem. The control method includes: connecting axes of n motors in tandem, and collecting basic parameters of each motor; synthesizing a voltage space vector reference value; acquiring an expected voltage output vector; realizing the rotational speed synchronization and load balancing of the motors with the axes connected in tandem; and monitoring a working process of the motors with the axes connected in tandem in real time and solving the fault. The present disclosure greatly improves a collaboration ability of the motors, enhances fault detection and coping abilities and reduces resource consumption costs.