Flux Density Distribution in Single Conductor Motor — Lesson 3

This lesson covers the operations of a single conductor motor, focusing on the final expressions of current and velocity. It explains how the motor accelerates when the supply is switched on and how the back EMF increases as the velocity increases, leading to a decrease in current. The lesson also discusses the time constant and how it affects the final velocity of the motor. It further explores the effects of friction on the motor's operation, explaining how the motor decelerates when it encounters an opposing force, leading to a decrease in velocity and an increase in current. The lesson concludes with an exercise on how to derive velocity and current when a constant opposing friction force is present.

Video Highlights

01:03 - Explanation of the effects of back EMF on current and velocity
05:16 - Exploration of the effects of friction on motor operation
12:08 - Exercise on deriving velocity and current in the presence of friction

Key Takeaways

- The final velocity of a single conductor motor is determined by the supply voltage and the back EMF.
- The motor accelerates when the supply is switched on and decelerates when it encounters an opposing force such as friction.
- The time constant plays a crucial role in determining the final velocity of the motor.
- The motor will continue to move at a constant velocity when the electromagnetic force is equal to the opposing force.
- The motor will draw more power and slow down when the opposing force increases.