AC Generators

Question 1

What 3 things are required to produce an EMF by Induction?

Answer 1

Relative Movement
Magnetic Field
Current

Question 2

What is the most common type of generator in use today?

Answer 2

Brushless Generator

Question 3

List 2 things that the generated EMF output will depend upon?

Answer 3

Increasing or decreasing the strength of the magnetic field.

Question 4

What is fitted to the AC generator to make it turn? Give 2 examples used in HM Ships.

Answer 4

The stator
The rotor

Question 5

What sort of current is fed into the Exciter Stator?

Answer 5

DC

Question 6

What is the purpose of the Rectifier assembly?

Answer 6

Converts the AC exciter output to DC and this DC is then fed to the rotor of the main generator.

Question 7

How can the voltage generated by an AC generator be altered?

Question 8

If the magnetic field around the AC Generator Rotor is stable ( made from a DC supply), how can the Generator produce and AC output?

Question 9

What is the output from Generators fitted to HM Ships and how does the AVR know what’s being produced?

Question 10

Draw and label a Step-Up Transformer

Question 11

Draw and label a Step-Down Transformer.

Question 12

Draw and label a Single Loop Generator.

Question 13

Label a Brushless Generator.