Forum Diagram: inverter

Wednesday, November 12, 2014

Build a 500W Low Cost 12V to 220V Inverter

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

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.

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. 500W

Wednesday, September 17, 2014

Simple 40 Watt Inverter

This is the schematic of a simple 40W , 12 volts to 220 Volts inverter.You don’t believe, this is simple and cheap and working for me for last 4 years.The heart of the circuit is a CD 4047 IC which is wired as an astable multi vibrator here.Resistance and Capacitance at pin 1&2 determines the out put frequency.

Circuit diagram :

simple-40-watt-inverter

Simple 40 Watt Inverter Circuit Diagram

Here it is set to 60Hz.Due to this a two 180 degree out of phase ,120 Hz , 50% duty cycle waveforms will appear at pin 10 & 11.These waves are amplified by the complementary symmetry amplifier made of transistors BC 337 & TIP 3055 to drive the out put transformer.Don’t get feared of the technical terms, just wire it on a all purpose PCB.It is simple and will work.Don’t worry about the transformer windings ,buy a 220-110-0 primary,12-0-12 secondary , <50w transformer.you can select output voltage of 110v or 220v by a two way switch using such a transformer.

Don’t worry if you don’t have such a transformer, a simple 220 to 12-0-12 will also do the trick sacrificing the 110V option or vice versa.The best way to get a transformer is to break all useless electronic devices in your trash.Most probably you will find the transformer or more components needed here!

Tips :

First wire to oscillator part only.Then check out put Pin 10 &11 of CD4047 to obtain the required wave forms ( two 120Hz ,180 degree out of phase,50% duty cycle waves.

Then connect transistors ,transformer and load (25 W bulb for test).See it working!.

Monday, September 15, 2014

New 100W Inverter 12VDC to 220VAC circuit diagram

The following diagram is an inverter schema which will give you 220V AC 50Hz with maximum power of 100W. This inverter built using transistors both the square wave generator and the amplifier.The Q1 and Q2 used generate square wave. Q5-Q8 amplify the signal and the transformer to increase the AC/square wave current from 12VAC to 220V AC 50HZ.

100W Inverter 12VDC to 220VAC schema diagram

Inverter PCB layout

Friday, September 12, 2014

Converter 12 Vdc to 230 Vac or Inverter

As shown in the Inverter schema diagram obove , Its used as the oscillator stage astable multivibrator contained in IC1, a CMOS 4047 (this cult series 40xx series) by varying the resistance value of R1 trimmer (220 k total resistance) can vary the oscillation frequency of 40 Hz to 70 Hz square wave, phase shifted by 180 °, Output pin 10-11 will drives two NPN transistors TR1-TR3, which in turn is fed to the TR2-TR4.
Converter 12 Vdc to 230 Vac or Inverter Schematic

The diodes DS2-DS3, mounted on the output transistors TR2-TR4 are used to protect against voltage surges appearing across the windings V 9 + 9 V transformer T1. For the transformer T1, I used an ordinary mains transformer (primary 230 V so) with a secondary dual 2 x 9 V.
inveter-component-pin-layout

Parts List:
R1 ……. 220 k trimmer
R2 ……. 330 k
R3 ……. 680
R4 ……. 2.2 k
R5 ……. 2.2 k
C1 ……. 4.7 nF polyester
C2 ……. 220 uF electrolytic
DS1 ….. 1N4004
DS2 ….. 1N4004
DS3 ….. 1N4004
DL1 ….. LED
TR1 ….. BC184 NPN
TR2 ….. NPN BDX53C
TR3 ….. BC184 NPN
TR4 ….. NPN BDX53C
IC1 …… 4047 CMOS
T1 …….. transformer sector 80 VA primary 230 V 0.35 A / Secondary 2 x 9 V 3.5 A
S1 ……. switch
Note :

Two final power TR2-TR4 should be mounted on the right size heatsink, otherwise they will overheat. You can choose from MJ4033 – MJ3007 or more, provided that the NPN.
The maximum power output that can be used depending on the size of the core of the transformer T1, the VA is: with 50 VA can be taken in the secondary 230 V 0.2 A (current consumed by the end will be 4 A) with 90 VA can be taken on the secondary 230 V 0.4 a (current consumed by the end will be 7 A).
To power the schema from the 12V battery, it will take over at least 1.8 millimeters in diameter, to avoid loss by Joule effect.

Thursday, August 21, 2014

3000 watt power inverter 12V DC to 230V AC

3000 watt power inverter 12V DC to 230V AC

Circuit Diagram of 3000 watt power inverter 12V DC to 230V AC

Fig. 2: Sine-wave voltage and conventional square wave voltage with both 230 Volt rms

Fig. 3: Square wave voltage with duty cycle 25% for 230 Volt rms ("modified sine")

PCB Layout:3000 watt power inverter 12V DC to 230V AC

Component Placement: 3000 watt power inverter 12V DC to 230V AC

fig.: output voltage with no load or inductive load.

fig.: resistor 0,001 Ohm made of high-grade steel sheet metal

Control electronics | 3000 watt power inverter 12V DC to 230V AC

fig.: control electronics on strip hole plate (previous version) and PCB of the "professional edition"

Assembly of the mosfet-transistors on the heat sink | 3000 watt power inverter 12V DC to 230V AC

fig.: heat sink, mosfet transistors, connections.

Final assembly | 3000 watt power inverter 12V DC to 230V AC

fig.: 1500 VA inverter with 2 parallel transformers and 1000 VA inverter

Source:http://www.qsl.net

Thursday, August 14, 2014

Simple Micro Inverter circuit DC voltage AC 12v x110v

This is a micro-inverter DC voltage to AC from a 12v battery can generate a voltage of 110 or 220 volts AC and a frequency of 50Hz to 60Hz. The schema is very simple and does not need a printed schema board, It is composed of two transistors oscillators that generate the square wave pulse to the transformer in the case is 10 +10 and its output 220V or 110V. This schema is 50Hz, but can be changed by changing the value of RC .

Micro Inverter schema DC voltage AC 12v x110v Circuit Diagram

This schema has the power transistor and that depends on the transformer.

Simple Micro Inverter schema DC voltage AC 12v x110v

Tuesday, August 12, 2014

Power Mosfet Inverter Wiring diagram Schematic

This Power Mosfet Inverter Circuit Diagram can deliver .high-voltage ac or de, with a rectifier and filter, up to several hundred volts. The secondary and primary of T1-a 12.6 to 440 V power transformer, respectively-are reversed; e.g., the primary becomes the secondary and the secondary becomes the primary. Transistors Q1 and Q2 can be any power FET. Be sure to heat sink Q1 and Q2. Capacitors C1 and C2 are used as spike suppressors.

Power Mosfet Inverter Circuit Diagram