1000w Inverter
1000w Inverter
1000w Inverter
A relatively simple 1000 watt pure sine wave inverter circuit is explained here
using a signal amplifier and a power transformer.
As can be seen in the first diagram below, the configuration is a simple mosfet
based designed for amplifying current at +/-60 volts such that the connected
transformer corresponds to generate the required 1kva output.
Contents [hide]
1 Circuit Description
2 The Sinewave Generator Circuit
o 2.1 Parts List for the sine generator circuit
o 2.2 How to Connect Batteries
o 2.3 Complete 1 kva inverter circuit design with 50 Hz sine oscillator
3 Recommended for You:
Circuit Description
Q1, Q2 forms the initial differential amplifier stage which appropriately raises
the 1vpp sine signal at its input to a level which becomes suitable for initiating
the driver stage made up of Q3, Q4, Q5.
This stage further raises the voltage such that it becomes sufficient for driving
the mosfets.
The mosfets are also formed in the push pull format, which effectively shuffles
the entire 60 volts across the transformer windings 50 times per second such
that the output of the transformer generates the intended 1000 watts AC at the
mains level.
Each pair is responsible for handling 100 watts of output, together all the 10
pairs dump 1000 watts into the transformer.
For acquiring the intended pure sine wave output, a suitable sine input is
required which is fulfilled with the help of a simple sine wave generator circuit.
The inverter is driven with voltages of +/-60 volts that amounts to 120 V DC.
The PWM circuit utilizing the IC555 has also been referred in the next
diagram, which may be used for triggering the above 1000 watt inverter
circuit.
Parts List for the sine generator circuit
All resistors are 1/8 watts, 1%, MFR
R1 = 14K3 (12K1 for 60Hz),
R2, R3, R4, R7, R8 = 1K,
R5, R6 = 2K2 (1K9 for 60Hz),
R9 = 20K
C1, C2 = 1µF, TANT.
C3 = 2µF, TANT (TWO 1µF IN PARALLEL)
C4, C6, C7 = 2µ2/25V,
C5 = 100µ/50v,
C8 = 22µF/25V
A1, A2 = TL 072
Q1, Q2 = BC556
Q3 = BD140
Q4, Q5 = BD139
The proposed 1 kva inverter discussed in the above sections can be much
streamlined and reduced in size as given in the following design:
Here just four mosfets have been used which could be IRF4905 for the p-
channel, and IRF2907 for n-channel.
Complete 1 kva inverter circuit design with 50 Hz sine oscillator