60hz Sine

277

04:48:06

Maybe can use something like this as sinusoid pwm for an inverter. Well it's not really sinusoidal, and it's not pwm in the traditional sense, but the end result is the same :P
Not sure if it is practical cos still need to generate 2 accurate clocks, the frequency will drift here cos I couldn't get any rational clocks to fit (1/clk1 - 1/clk2) that equal 60hz accurately
And could get rid of the low pass filter if use a high enough frequency so that the logic gate propagation delay does the filtering for free ;) lol now thats dirty electronics

Anybody knows if this method gets used in the real world?

published 6 years ago

prinzrainer

6 years ago

Typically a true sine wave inverter has variable duty cycle on each period and it is controlled digitally with feed back control system basing on the output voltage.

roops1967

6 years ago

Thank you for that prinzrainer. The point of this circuit was to show the method used to create this wave, that is XOR 2 clocks

hurz

6 years ago

@roops1967, actually the PWM you generate is for a triangle, think about it must be something which suddenly turns its direction and not slowly like a sinewave. Check this http://everycircuit.com/circuit/6532813420232704 i have set a filter corner to 1kHz to see better.

roops1967

6 years ago

Nicely demonstrated hurz. I know it wasn't sine, just wanted to show a quick cheat that looked easy to implement, but come to think about it I don't think it's a practical solution in reality anyway

roops1967

6 years ago

You sure know your filters! :)

Antonio1961

5 years ago

Cool

tooshy

5 years ago

Or see mine

tooshy

5 years ago

https://everycircuit.com/circuit/4534845144039424

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.