Machine Theory

Question 1

What is an electromagnetic machine?

Answer 1

An electromagnetic machine is one that links an electrical energy system to another energy system providing a reversible means of energy flow in its magnetic field.

Question 2

How can an electromagnetic system develop a mechanical force?

Answer 2

-By alignment
-By Interaction

Question 3

Describe allignment forces?

Answer 3

Arise when a magnetic material or circuit tries to align itself to a position of minimum reluctance.
F​=B^2A/2μ0​​

Question 4

Describe interactive forces?

Answer 4

Interactive forces occur when two current carrying conductors or coils interact through their mutual magnetic fields often resulting in torque.

Question 5

How do allignment and interactive forces work with rotors and stators?

Answer 5

Allignment- rotor seeks to allign stator poles to minimize magnetic reluctance, rotor shifts to reduce field energy
Interactive- Interaction between stator and rotor magnetic fields, torque generated between two coils

Question 6

Describe the components of a rotating machine?

Answer 6

Stator- stationary part producing magnetic field
Rotor- Rotating part interacting with magnetic field

The rotor rotates due to allingment or interactive forces depending on machine type

Question 7

What are the components of a linear machine?