Wiring Material: inverter

Showing posts with label inverter. Show all posts

Friday, December 12, 2014

Voltage inverter circuit

This voltage inverter circuit powering a dual supply op amp from a single battery problem. The circuit simply takes a positive voltage and inverts it. It uses only one 555 timer and a few other passive components, so it doesn't add much in the way of size and cost to a project.

Thursday, December 11, 2014

Voltage Inverter Circuit

This simple and inexpensive circuit can produce a dual (positive and negative) voltage from a single supply input.

It is therefore extremely useful for powering opamp and other circuits that require a dual voltage from a single battery.

Saturday, October 4, 2014

500W low cost 12V to 220V Inverter

Using this circuit you can convert the 12V dc in to the 220V Ac. In this circuit 4047 is use to generate the square wave of 50hz and amplify the current and then amplify the voltage by using the step transformer.

Attention: This Circuit is using high voltage that is lethal. Please take appropriate precautions

How to calculate transformer rating

The basic formula is P=VI and between input output of the transformer we have Power input = Power output

For example if we want a 220W output at 220V then we need 1A at the output. Then at the input we must have at least 18.3V at 12V because: 12V*18.3 = 220v*1

So you have to wind the step up transformer 12v to 220v but input winding must be capable to bear 20A.

SG3524 PWM Inverter Circuit 250W

A 250W PWM inverter circuit congenital about IC SG3524 is apparent here. SG3524 is an chip switching regulator circuit that has all capital chip appropriate for authoritative a switching regulator in individual concluded or push-pull mode. The congenital in circuitries central the SG3524 cover beating amplitude modulator, oscillator, voltage reference, absurdity amplifier, afflict aegis circuit, achievement drivers etc.

SG3524 forms the affection of this PWM inverter ambit which can actual its achievement voltage adjoin the variations in the achievement load. In a non PWM inverter the change in achievement amount anon affects the achievement voltage (when achievement amount increases achievement voltage decreases and carnality versa), but in a PWM inverter the achievement voltage charcoal connected over a circuit of achievement load.

Sunday, September 21, 2014

500W low cost 12V to 220V inverter

Circuit diagram
author: Ashad Mustufa
e-mail: mustufa66@hotmail.com
web site: http://www.electronics-lab.com

How to calculate transformer rating
The basic formula is P=VI and between input output of the transformer we have Power input = Power output
For example if we want a 220W output at 220V then we need 1A at the output. Then at the input we must have at least 18.3V at 12V because: 12V*18.3 = 220v*1
So you have to wind the step up transformer 12v to 220v but input winding must be capable to bear 20A.

Sunday, August 17, 2014

100 Watt Inverter 12V DC to 220V AC

Electronic schematic diagram for 100 Watt Inverter 12V DC to 220V AC.

The IC1 Cd4047 wired as an astable multivibrator produces two 180 degree out of phase 1/50 Hz pulse trains.These pulse trains are are preamplifes by the two TIP122 transistors. The out puts of the TIP 122 transistors are amplified by four 2N 3055 transistors (two transistors for each half cycle) to drive the inverter transformer. The 220V AC will be available at the secondary of the transformer. Nothing complex just the elementary inverter principle and the schema works great for small loads like a few bulbs or fans. If you need just a low cost inverter in the region of 100 W, then this is the best.

Notes:

A 12 V car battery can be used as the 12V source.
Use the POT R1 to set the output frequency to 50Hz.
For the transformer get a 12-0-12 V, 10A step down transformer. But here the 12-0-12 V winding will be the primary and 220V winding will be the secondary.
If you could not get a 10A rated transformer , don’t worry a 5A one will be just enough. But the allowed out put power will be reduced to 60W.
Use a 10 A fuse in series with the battery as shown in schema.
Mount the IC on a IC holder.
Remember, this schema is nothing when compared to advanced PWM inverters.This is a low cost schema meant for low scale applications.

Design Tips:

The maximum allowed output power of an inverter depends on two factors. The maximum current rating of the transformer primary and the current rating of the driving transistors.

For example ,to get a 100 Watt output using 12 V car battery the primary current will be ~8A ,(100/12) because P=VxI. So the primary of transformer must be rated above 8A.

Also here ,each final driver transistors must be rated above 4A. Here two will be conducting parallel in each half cycle, so I=8/2 = 4A .

These are only rough calculations and enough for this schema.