Posted by Circuits Arena on Monday, 23 November 2015
50 Watt Small Inverter Circuit home made is the artlcle explaining 50 Watt Small Inverter Circuit: Circuit Description The circuit may be understood with the following points: Referring to the f...
50 Watt Small Inverter Circuit:
Circuit Description
The circuit may be understood with the following points:
Referring to the figure, transistors T1 and T2 along with the other R1,
R2, R3 R4, C1 and C2 together form a simple astable multivibrator (AMV)
circuit. A multivibrator circuit basically is composed of two
symmetrical half stages, here its formed by the left and the right hand
side transistor stages which conduct in tandem or in simple words the
left and the right stages conduct alternately in a kind of a perpetual
“motion”, generating a continuous flip flop action.
The above action is responsible of creating the required oscillations
for our inverter circuit. The frequency of the oscillation is directly
proportional to the values of the capacitors or/and the resistors at the
base of each transistor.
Lowering the values of the capacitors increases the frequency while
increasing the values of the resistors decreases the frequency and vice
versa. Here the values are chosen so as to produce a stable frequency of
50 Hz.
Readers, who wish to alter the frequency to 60 Hz, may easily do it by just changing the capacitor values appropriately.
Transistors T2 and T3 are placed at the two output arms of the AMV
circuit. These are high gain; high current Darlington paired
transistors, used as the output devices for the present configuration.
The frequency from the AMV is fed to the base of T2 and T3 alternately
which in turn switch the transformer secondary winding, dumping the
entire battery power in the transformer winding.
This results in a fast magnetic induction switching across the
transformer windings, resulting the required the mains voltage at the
output of the transformer.
Parts Required
You will require the following components for making this 50 watt homemade inverter circuit:
R1, R2 = 100K,
R3, R4 = 330 Ohms,
R5, R6 = 470 Ohms, 2 Watt,
R7, R8 = 22 Ohms, 5 Watt
C1, C2 = 0.22 uF, Ceramic Disc,
D1, D2 = 1N5402 or 1N5408
T1, T2 = 8050,
T3, T4 = TIP127,
T5, T6 = 2N3055 (TO-220)
General purpose PCB = cut into the desired size, approximately 5 by 4 inches should suffice.
Battery: 12 volts, Current not less than 10 AH.
Transformer = 9 – 0 – 9 volts, 5 Amps, Output winding may be 220 V or 120 volts as per your country specifications
Sundries: Metallic box, fuse holder, connecting cords, sockets etc
