Tuesday, July 29, 2014

Inverter working principle; How Inverter works; AC Inverters

Inverters are now integral part of every household. As they serve the better and cheap source of supply in case of power cuts. Earlier days Diesel generators were most widely used for household in case of power cuts.

There is always curiosity that how an inverter works.

Working Principle:-
In inverter Alternating supply is first converted into DC supply then again into alternating supply that is why it’s name is inverter.
There is obvious question in mind that why there is need for conversion into DC??
Answer for the same is that for inverter working Battery is required which is needed to be charged through DC when power source is available and when power supply wasn't available that DC power supply which is stored by Battery is reconverted into AC supply through it’s inverter action.
Also when power supply is available then there is no need for Inverter action in that case all points which were on inverter will be charged through power supply. Means that inverter will get bypassed for doing that phase which is coming from power supply source is directly connected to inverter o/p socket.

Wiring of points through Inverter:-
To get inverter supply at points one single wire is taken from inverter O/p and will connected at points phase points which are to be connected through inverter. Neutral is taken from the source.
Now confusion arises why there is no neutral required from inverter O/P?
Answer for the same is that Neutral from Power supply source is never disconnected even if there wasn't any power. That is why neutral is not required.

This doesn't mean that you can’t take neutral from inverter O/p. You can take the same but that will leads to extra cost of neutral wiring also.
Inverter Connections:-
An inverter consists of following components:-
1.      Inverter
2.      Battery
Below diagram will shows you how to do wiring of an Inverter:-

Due attention of positive and negative terminals must be taken before connection of battery to inverter. As wrong connections may leads to short circuit.

Inverters of various sizes available in the market from 300 VA to KW’s depending upon requirements and backup required. More batteries required if more backup required.