Modified Sine Wave Inverter Circuit Using two IC 4017

One of the innovative methods of generating modified sine pulses designed by me, was built and tested by Mr. Ali Rexhepi, let's learn how he went about the entire procedure. Before that first have a look at the circuit diagram which was invented and designed by me.

Swagatam here are those screen shots .There's four pics,

two of the wave forms PWM at 59.760 Hz are at diode junctions  IC1 & IC2. The third one is of the square wave clock input at 1.067 KHz .The difference between the upper and lower pulses of the clock input is 51 ms. I was actually able to improve on the Oscillator circuit by trial and error. The one you posted had difference in the upper and lower pulses of 134 ms. I used 150 Ohm & 5.66 KOhms for the two resistors and C1 used 0.1 uF Cap.The last one is of the complete circuit on a proto board, don't mind my lousy breadboarding techniques, lol!

Thanks for all your help, this was an ingenious design. I am going to use power Mosfets for the power circuit, is that OK. They are SUP90N07 from Vishay continuous drain current of 90 amps each , parallel 4 per side. Could you please recommend what the Gate resistors I should use instead of the 1 K ohm resistors ?

 Sincerely  Ali Rexhepi

Hi Ali,

Thanks a lot, these pictures are amazing and your breadboarding is much better than mine. I'll post all of these screen shots in the article itself along with all the given information.....it may take some time to appear.

Honestly, I don't have much practical experience with MOSFETs so won't be able to help in this regard, but I'm sure when you could do such complicated and comprehensive analysis with the circuit then off-course finding about MOSFETs would be just as easy for you.

Thanks and Best Regards,
Keep Posting,

Yours Sincerely,
Swagatam.

Swagatam here is the circuit diagram I was using as the drive circuit for my square wave inverter I built. I"m not sure which Resistors or Capacitor to change to get the desired frequency of 1100 Hz.

It is very stable running at 60 Hz , tell me what you think.

 Thanks again !!!

Ali

Hi Aliman,

You may adjust VR1 or alter the value of C1 to change the frequency of the oscillator, I have already published one inverter circuit using the same oscillator configuration, the only difference being the IC which was 4049 for my circuit.

Best Regards.

Continued HERE,

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