Infinity Turbine LLC


Publication Title | How an Inverter Works

Organic Rankine Cycle

Waste Heat to Power ORC search was updated real-time via Filemaker on:

Waste Heat to Power ORC | Return to Search List

Search Completed | Title | How an Inverter Works
Original File Name Searched: HP23P53.pdf | Google It | Yahoo | Bing



Page Number: 001
Previous Page View | Next Page View

Text | How an Inverter Works | 001



How an Inverter Works

Clifford W. Mossberg

The process of converting low voltage direct current (DC) electricity into high voltage alternating current (ac) is not particularly "hi-tech" but it has several levels of complexity. The most complex levels use high tech solutions and are frequently employed because they make efficient and reliable inverters. In this article I will not try to explain the esoteric details of such "techy" stuff – I'm not qualified – but I will try to give the novice user a basic idea of what is going on inside that heavy box hooked up to the batteries.

Inverting really means Switching Polarity

At the simplest level alternating current (ac) can be achieved by a simple switching device which just swaps connections to the battery leads.

In the very basic circuit and graph in illustration 1, a simple DC resistance is shown, for instance a light bulb. The "voltmeter" I have drawn is the type which registers zero in the center of the meter, so current flow in either direction through the resistance (bulb) will show up as movement of the needle to either the left or right of zero, depending on the polarity of the battery hook-up.

Voltmeter

0

Resistance

Battery

Simple DC resistance circuit

On

Off

Inverters

V o l t a g e

Time

Full Voltage

When the resistor is hooked to the battery,

current will start to flow. The voltmeter will

measure a voltage drop equal to the voltage

which the battery can produce. If the battery

was 12 volts and the resistance was an 0 automotive tail light bulb the reading of the

volt meter would be 12 volts. The graph shows that this would start the instant the resistance was hooked to the battery and would stop just as suddenly when the resistance was disconnected. The length of time the voltage shows on our voltmeter could be anything in this example, from milliseconds to hours.

In illustration 2 the leads from the battery to the resistor have been switched so the resistor is hooked up opposite what it was in illustration 1. You will notice that the voltmeter is now deflected to the same

Illustration 1A

Voltmeter

Resistance

Battery

Simple DC resistance circuit with opposite polarity to 1A

Illustration 2A

Illustration 1B

Time

On

Second half cycle of inverter opperation. Leads to battery are switched; voltage turns on in opposite direction, remains on for some period of time, and is turned off.

Illustration 2B

First half cycle of inverter opperation. Leads

to battery are connected; voltage turns on, remains on for some period of time, and is turned off.

V o l t a g e

Full Voltage

Off

Home Power #23 • June / July 1991

53

Image | How an Inverter Works



how-an-inverter-works
Waste Heat to Power - ORC - - Waste Heat to Power System - Go to website

Search Engine Contact: greg@infinityturbine.com