Speed Control of Three-Phase Induction Motor (Contd.) — Lesson 6

This lesson covers the concept of speed control in induction motors, focusing on modern methods of control. It delves into the academic exercise of understanding the induction motor and how speed control was traditionally achieved. The lesson also discusses the advantages of using an inverter for speed control and starting the motor. It further explains the concept of 'slip' in induction motors and how it affects the speed control. The lesson concludes with a discussion on the three popular methods of braking an induction motor: plugging, DC dynamic braking, and regenerative braking.

Video Highlights

01:35 - Discussion on the use of inverters for speed control
09:54 - Explanation of the concept of 'slip' in induction motors
24:27 - Discussion on the traditional methods of braking an induction motor
28:56 - Explanation of the effect of changing the supply phase sequence on the motor

Key Takeaways

- Modern inverters allow for easy and efficient speed control of induction motors, overcoming the limitations of traditional methods.
- The concept of 'slip' is crucial in understanding the speed control of induction motors.
- The speed of an induction motor can be controlled by maintaining a constant V/F ratio.
- Braking of an induction motor can be achieved through plugging, DC dynamic braking, or regenerative braking.
- Changing the supply phase sequence of the motor can affect its speed and direction.