Transformers Flashcards Preview

AGK - Electrics > Transformers > Flashcards

Flashcards in Transformers Deck (9)
Loading flashcards...
1

A transformer allows you to

Convert from one voltage to another

Allows the passing of AC while blocking DC

2

Turn ratio formula - transformers

Vs/Vp = Ns/Np

3

How does a step up transformer work

Increases the voltage by increasing the amount of coils around the soft iron core

4

Step up transformer has more turns

On the secondary than the primary

Step down - more on the primary than the secondary

5

Auto transformer

Different points you can pick of the required voltage

E.g desk fan buttons for variable speed

6

Variable transformer

Dial to control voltage

E.g electric train set speed controller

7

Current transformer (ring transformer)

Allows you to measure the amps with a little amount of weight - less packaging

Hoop with coils around it, wire with the current through the centre



8

Transformer rectifier unit

Transformer and a rectifier at the same time

Converts AC to DC

Cooling fan for when the battery is charged - energy is dissipated as heat

9

Rotary inverter

DC motor rotating on a AC generator

Magnet spins in an AC generator