1. Speed Control of AC motors (AC Drives)

2. Dynamics of Motor Load Systems J moment of inertia kg-m2 instantaneous angular velocity rad/sec T developed torque of the motor N.m. The load torque. Viscous Friction torque. B Viscous Friction coefficient.

3. Steady State Stability

4. Four-quadrant operation.

6. Pulsed Resistor Braking

7. Rectifier Regenerative Front End

8. Pulse-width-modulated inverters Pulse-width modulate inverter used to shape the output ac voltages to be as close to a sine wave as possible. One-leg switch-mode inverter.

12. Simulation of one leg PWM Inverter

13. Single ‑ phase full ‑ bridge inverter. PWM with Bipolar Voltage Switching PWM with Unipolar Voltage Switching

14. PWM with Bipolar Voltage Switching

15. PWM with Unipolar Voltage Switching Waveforms

16. THREE ‑ PHASE INVERTERS THREE ‑ PHASE INVERTERS driving 3-phase induction motor Waveforms 3phase INVERTERS driving variable 3-phase induction motor

17. Fig.4.22 Three ‑ phase PWM waveforms and harmonic spectrum.