Electric Motors Lecture Notes

These flashcards cover key concepts and details about electric motors, their types, applications, and advantages, based on the lecture notes provided.

What does the word 'motor' refer to?

A power unit that generates motion or a 'prime mover'.

What is an electric motor?

A device used to convert electrical energy into mechanical energy.

What are the two important parts of an AC motor?

The stator (stationary part) and rotor (rotating part).

Who invented the first AC induction motor?

Nikola Tesla in 1887.

What is a DC motor?

A class of electrical motors that convert direct current electrical energy into mechanical energy.

Why are AC motors commonly used in the industry?

Due to their reliability, durability, efficiency, and cost-effectiveness.

What is the main advantage of asynchronous motors?

They are cheaper, simpler, and more rugged than synchronous motors.

What is one disadvantage of synchronous motors?

They are more expensive and complex than asynchronous motors.

When should you use synchronous motors?

For applications requiring constant speed and high efficiency.

What are gear motors used for?

To enhance torque at constant speeds, useful in applications requiring high torque.

What are the two types of motors that use pressurized fluid and compressed air?

Hydraulic motors (pressurized fluid) and pneumatic motors (compressed air).

List one reason why DC motors are commonly used in robotics.

They offer variable speed capabilities for precise control of movements.

What advantage do DC motors have regarding starting torque?

DC series motors are known for their high starting torque, crucial for rapid acceleration.

Name one application where AC induction motors are used.

Used in conveyor systems, manufacturing lines, and material handling processes.

What makes servo and stepper motors suitable for specific applications?

They offer precise control and are used in applications requiring high accuracy and positioning.

What is the operational versatility of AC motors?

They can operate continuously at zero speed while maintaining full torque.