Motor Control Device Independent Multi-Motor Torque Regulation
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Solution Overview
Problem
Current motor control technologies face challenges in simultaneously controlling multiple motors independently, particularly in fields like independent-drive electric vehicles and multi-axis robots, where precise control of torque and speed is required, leading to increased manufacturing costs and complexity, and difficulties in modifying control parameters.
Innovation Solution
A motor control device that includes multiple inverters and a control CPU with a command generator, PI controller, and vector controller, which generates PWM signals to correct torque and speed commands using feedback information, allowing for stable torque control across a wide speed range and facilitating parameter adjustments through a user-friendly interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If one motor controller is used to control multiple motors, then manufacturing cost is reduced and device size is minimized, but control reliability and precision deteriorate
Solution Approach 1:
The patent divides the control system into independent control channels for each motor, with separate PI controllers and current control loops. Each motor receives dedicated torque commands and feedback processing, ensuring independent and reliable control while sharing the same physical controller hardware. This segmentation maintains control reliability despite using a single controller unit.
Solution Approach 2:
The patent implements dynamic torque distribution and real-time control adjustment for each motor based on feedback from current sensors and position encoders. The controller dynamically adjusts torque commands, speed references, and control parameters for each motor independently, enabling precise control adaptation that maintains reliability even under varying load conditions and motor failures.
2Volume of moving object
If one motor controller is used to control multiple motors, then device size is minimized, but control precision deteriorates
Solution Approach 1:
The control system is segmented into independent control channels for each motor, with separate PI controllers, current control loops, and feedback processing paths. Each motor receives dedicated torque commands and undergoes independent feedback processing, ensuring precise control despite the shared physical controller hardware.
Solution Approach 2:
The patent implements comprehensive feedback mechanisms for each motor including current feedback from sensors, position feedback from encoders, and speed feedback. The PI controllers continuously adjust torque commands based on feedback errors, and the system performs real-time monitoring and correction to maintain high control precision across all motors.
3Adaptability or versatility
If control parameters are modified for testing, then research capabilities improve, but system complexity increases due to program modifications
Solution Approach 1:
The patent pre-configures multiple sets of control parameters including PI controller gains, current limits, speed references, and torque constants that can be selectively activated. This preliminary preparation of parameter sets allows researchers to switch between different control configurations without modifying the underlying program structure, reducing complexity while maintaining adaptability.
Solution Approach 2:
The control system allows dynamic adjustment of parameters during operation through a user interface or external controller. Researchers can modify PI gains, current limits, speed references, and other parameters in real-time without changing the program code, enabling flexible testing while maintaining system stability through continuous feedback control.
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
Enables stable torque control at predetermined speeds, even at high speeds or under varying loads, and simplifies the process of setting and changing control parameters, enhancing research and development capabilities.
Implementation Method 1
A motor is a device that generates torque by using electromagnetic induction law
Implementation Method 2
a PI controller that generates a torque command and a speed command by performing a proportional integral operation using feedback information
Implementation Method 3
a vector controller that generates a PWM control signal using the torque command and the speed command
Data Source
AI summary
Provided is a motor control device controlling several motors independently. The motor control device includes a plurality of inverters supplying power to each of several motors, respectively, and a control CPU provided with a command generator generating a control command, a PI controller that generates a torque command and a speed command by performing a proportional integral operation using feedback information and the control command transmitted from the command generator, and a vector controller that generates a PWM control signal using the torque command and the speed command and supplies the generated PWM signal to the plurality of inverters, in which the command generator includes an input translator that converts the command input as a QMCL command into the control command.