2000-5000W INVERTER

THIS CIRCUIT IS SIMPLE YET MUST BE BUILT PROPERLY TO AVOID FIRES AND MELTDOWN.

THE OUTPUT IS A MODIFIED SQUARE WAVE THAT RUN ALMOST ANYTHING INCLUDING COMPUTERS AND MONITORS.

MOST PARTS IN THIS CIRCUIT CAN BE SUBSTITUTED WITH OTHER SIMILAR PARTS…EXAMPLES ARE:

OPTO COUPLERS, MOSFETS, MAIN POWER TRANSFORMER, DIODES, ETC…

DON’T BE AFRAID TO EXPERIMENT WITH DIFFERENT VALUES TO OBTAIN BETTER EFFICIENCY AND MORE STABLE OUTPUT.

R1, R2=4K7                R3=18K          R4=47K          R5, R10=10K 

R6=2K                                    R7, R8, R12, R14, R15=1K                R9=12K

R11=10 ohms              R13=10MEG               R16, R18=1K8

R17, R19=22 ohms      R20, R21=100 ohms                R22=100 ohm 8W M-film

(ALL RESISTORS ARE 1W UNLESS STATED)

C1, C8, C12=100nanoFarad polyester

C2, C5, C6, C9, C10, C11=100uFarad 25V electrolytic

C3, C4, C7=1nanoFarad Polyester

C13=47PICO CERAMIC

C14=68PICO CERAMIC

C15, C16=2.2uF 63V metallised polyester film

C17=30uF 220vac 60hz motor capacitor

C18=22000uF 16v electrolytic

C19=0.22uF 250vac class X capacitor (basically a filter capacitor for ac line)

D1, D3, D4, D5=BA157  1AMP fast recovery rectifier diodes

D2, D7=5MM GREEN LED

D6, D12, D13, D14, D15=1N4002

D8, D9, D10, D11=BZX88C12V (basically 12v zener diodes at 2-4amps each)

D16=6AMP 50V RECTIFIER DIODE

Q1, Q2=IRFZ44 (TRY TWO IN PARALLEL IF ONE DOESN’T WORK) OR IRF640 POWER MOSFETS

IC1=7808

IC2=SG3524

IC3=555 TIMER IC

IC4=4060B

IC5=4017B

IC6=4071B

IC7, IC8=4N35 OPTO COUPLER

L1=1000uH 1.1AMP CHOKE

L2, L3=10uH MIN AXIAL CHOKE

L4=7.5mH x2 common mode choke, 8amps rated

L5=2.4mH 8amp toroidal choke

T1=1000VA-2000VA inverter transformer**see note at bottom of pages.

FS1=400milliamp glass fuse

FS2=250milliamp glass fuse

FS3=30A HRC CERAMIC FUSE X3 CONNECTED IN PARALLEL

FS4=8AMP HRC CERAMIC FUSE

X1=3.8-4MHZ CRYSTAL (actual value should be 3.93216mhz).

VDR1=25KOHM 1W RESISTOR

LP1=NEON LAMP WITH 200OHM RESISTOR

Note about T1.

T1 should be either a store or surplus bought 24vct to 120vac 1000-2000va transformer.

Or

You can custom wrap your own transformer for better performance.

Try this:

50 turns 20ga magnet wire center tapped as the primary.

250 Turns 14-12ga magnet wire as the secondary.

THIS CIRCUIT CAN BE MADE MUCH SIMPLER BY SIMPLY REPLACING THE PULSE FORMING CIRCUIT INVOLVING IC4 AND IC5 WITH A SIMPLE 2 TRANSISTOR PUSH PULL MULTIVIBRATOR CIRCUIT CONNECTED TO IC7A AND IC8A…OF COURSE TIMED FOR PROPER 60HZ OUTPUT.