[Visual motor control and test comprehensive experimental platform for multi-level teaching]
“Visual motor control and test comprehensive experimental platform for multi-level teaching†(hereinafter referred to as “experimental platformâ€) is a set of visual motor comprehensive experimental teaching platform developed for motor control courses. The experimental platform includes: permanent magnet without The brush motor (motor body), the microcontroller is the driver of the control core, the dynamometer (analog load), and the data acquisition system.
The teaching experiment platform can achieve the following functions:
(1) Programming controls the motor
Students can directly control the motor by writing the program through the provided MCU control board. Through the emulator, the programming of the program is completed, and the control principle of the BLDCM motor is learned more independently.
(2) Data collection, real-time display and storage functions
The experimental platform has data acquisition functions, including real-time display of motor torque, real-time display of motor three-phase current, real-time display of motor vibration, and real-time display of motor operating temperature. And give the parameter values ​​at each moment and store all the collected parameter values ​​in a text for data playback.
(3) Data playback function
The visual interface can save and play back the experimental data previously made, avoiding the incomplete or lost data recording. After the playback time period is set, it will automatically enter the overview interface to simulate the scene at the time of data acquisition. Similarly, when the data is played back, it can also enter the chart enlargement display interface and the numerical display interface. This allows for comparisons to be made and is more intuitive than traditional manual recording.
(4) Simulation of complex electromechanical load characteristics
For the complex electromechanical load targeted by the science and technology experiments, the experimental platform can set the simulation load change program, simulate the electromechanical load characteristics and simulate the loading/unloading of the motor through the visual interface, which is closer to the demand change of the real application. Check the dynamic operation of the motor drive system.
The experimental platform aims to cultivate students' practical ability, design ability and innovative research ability. Students can use this experimental platform to carry out motor drive system assembly training, control training, motor control programming, system debugging, and exploration of new control strategies. Wait. Through the visual interface, students can reflect and re-recognize the basic principles and control strategies of the motor in the process of training and experimentation, and use the functions of playback contrast to compare and contrast the results of multiple experiments to cultivate students' innovative thinking ability. The experimental platform can perform the following types of experiments:
(1) Basic experiment
1 PWM control of brushless DC motor
2 SVPWM control of brushless DC motor
3 Fault-tolerant control of brushless DC motors
4 weak magnetic control of brushless DC motor
5 position sensor control of brushless DC motor
6 Load experiments for typical complex electromechanical loads (eg actuator load, washing machine load, etc.)
(2) Design experiment
Based on this platform, students can conduct independent and innovative experiments, including:
1 Comparison of different PWM control strategies
Students can use different PWM control strategies through program modification to compare the effects of different control strategies on motor performance. The torque, speed, phase current and other parameters of the motor under different PWM control strategies are displayed on the same interface and compared. .
2 Comparison of position sensor control and position sensorless control
Students can perform comparative experiments with position sensor control and position sensorless control through autonomous programming. The experimental results were compared at the same interface to compare the difference in motor performance with/without position sensor control.
3 Any load test simulating different load characteristics
The experimental platform can perform the combined programming test of the sudden/unloading load through the visual interface, and can capture the change of the motor parameters, complete the curve of the sudden/unloading load, and more intuitively let the students understand the running characteristics of the motor.
(3) Multi-level experimental teaching
Teachers can conduct multi-level experimental teaching and training when applying the platform for experimental teaching.
such as:
1 Train students to practice the disassembly, assembly and initial adjustment of the motor drive system;
2 Provide a single-chip Demo board to enable students to complete mapping, draw schematics, make PCBs, and master basic circuit practice capabilities;
3 Provide a single-chip Demo board, let students complete the program writing, exercise students' programming ability and programming application ability;
4 Provide the basic framework of the MCU Demo board and program, so that students can improve the control algorithm and train students' innovative thinking and algorithm programming ability;
5 Conduct various design experiments on this platform
By applying this teaching platform from different angles to conduct experimental teaching, teachers can exercise students' experimental operation, debugging, testing and innovative thinking skills from different levels and levels.
Name of the work: Visual motor control and test comprehensive experimental platform for multi-level teaching
Completed by: Nanjing Aerospace University
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