![IMPLEMENTATION OF A DC MOTOR SPEED CONTROL MAE 576 [MECHATRONICS] LAB-3 GROUP E Chembrammel Elavunkal Srinivasan Vishwajeet University at Buffalo, Mechatronics, Spring 2010](https://image.slidesharecdn.com/ppt3-100514031851-phpapp01/85/Lab-3-DC-Motor-Control-1-320.jpg)
Lab - 3 - DC Motor Control
- 1. IMPLEMENTATION OF A DC MOTOR SPEED CONTROL MAE 576 [MECHATRONICS] LAB-3 GROUP E Chembrammel Elavunkal Srinivasan Vishwajeet University at Buffalo, Mechatronics, Spring 2010
- 2. Problem Statement Creation and calibration of digital sensors - Building and interfacing a digital encoder to quantize and measure angular motions with focus on angular velocity measurement Interfacing actuators along with necessary drive electronics –specifically examining the interfacing a DC fan motor to the BS2. Using different control laws to try to achieve desired performance criteria-specifically examining one or more of the following control schemes(on-off ,P, PI,PD,PID); Quantitatively logging the resulting data to evaluate the actual performance –specifically examining creation of a real time logging interface using Stamp Plot.
- 3. Flow Chart
- 4. Plant layout
- 7. Calibration of optical switch For white back ground The binary value of the voltage switched states at 9mm The range of operation is between 5mm and 9mm
- 8. For Black back ground CALIBRATION OF OPTICAL SWITCH CONTD .
- 9. The encoder Made out of QRB1114 The number of gradations on the reflecting disc is 24 to get a count of 12 cycles per revolution Gives better RPM / count by the optical sensor
- 10. Measurement Authenticity PIN High PWM (255 Duty) MAX RPM = 6500 +/- 10% MAX VOLT = 10V RPM = 10/12 X 6500 = 5400
- 11. Motor drive The motor is driven using PWM values changing the duty cycle PWM RPM Range of operation Calibration of PWM drive
- 12. PWM drive calibration result The PWM cannot drive the motor below the 34% duty-cycle, which corresponds to 1.7 volts for the amplifier gain of 2. This corresponds to a cut-off voltage of 3.5V of the motor, and a motor speed of 1000 rpm. The range of operation of the motor is 34% to 100% of maximum duty cycle of the input signal.
- 13. Tachometer testing 12V Input Low noise high noise 50 ms sampling time 100 ms sampling time Tachometer calibration
- 14. On-OFF control 1000 ms 100 ms 50 ms
- 15. Differential Gap Control Differential gap
- 16. P control
- 17. PI Control
- 18. PD Control
- 19. PID Control
- 20. Conclusion Achieved Encoder Implementation Familiarized Motor Drive Techniques PWM with RC with OPAMP with BJT Understood Open Loop Control methods Achieved Closed Loop Control Using ON/OFF ON/OFF with differential gap PID family Understood Limitations of Digital Systems