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| Achu:
Hi, Could any one guide me on how to create a hardware to make spwm alternating on two two outputs for each half cycle. I indent not to use a micro-controller.(Though using an u-Controller is easy) |
| Psi:
You need to explain more about what you are after. What signals are the inputs and what are the outputs? If not using a micro controller then you are going to need compactors and latches/flipflops |
| Achu:
My aim is to create alternating spwm signals corresponding to each half cycle by comparing sine and ramp/triangular wave.I believe it is evident from the picture. Yes I'm willing to do it the hard way by not using programming. I might use it to drive an H bridge to make a crude inverter. |
| pwlps:
--- Quote from: Achu on May 30, 2019, 03:37:01 am ---My aim is to create alternating spwm signals corresponding to each half cycle by comparing sine and ramp/triangular wave.I believe it is evident from the picture. Yes I'm willing to do it the hard way by not using programming. I might use it to drive an H bridge to make a crude inverter. --- End quote --- It is not evident from the picture because there is an inconsistency: comparing sine and ramp/triangular wave from the top picture would yield a 50% duty cycle near zero voltage (single pulse PWM) but this is not the case for the bottom picture signal where you would you need a multiple-pulse pwm. Figure 5.4 in the following link shows how to modify your triangular reference. https://shodhganga.inflibnet.ac.in/bitstream/10603/33606/10/10_chapter5.pdf |
| Achu:
My sincere apologies.I am a noobie. But do you understand what I am trying to communicate? |
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