1. Single Phase Induction Motor Adjustable Speed Control Using DSP and Micro-Controller Jianming Yao ECE734 Project Fall 2000

2. Requirements for Single Phase Induction Motor Drives  Voltage ratio V aux /V main is approximately equal to the effective turns ratio , N aux /N main  Current ratio is I aux /I main =1/   V aux leads V main by 90º at rated frequency  Constant V/Hz for adjustable speed drive

3. Topology and Control Signals

4. Pulse Width Modulation (PWM) PWM is used to generate sinusoidal power output

5. PWM & Dead Time Generation

6. DSP Approach

7. Programming with TMS320F240

8. Micro-Controller Approach PWM for a & b PWM for c Speed control Testing points PIC17C756

9. Programming with PIC17C756

10. Hardware implementation or 23 AC~ Control signals 12 DSP Microcontroller

11. Experimental Results PWM signals for IGBT 10V/div, 0.1ms/div Motor currents 1A/div, 5ms/div