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Hi all,
Found the following code while searching the subject. It uses two external interrupts (INT0 and INT1) for detecting the zero crossing of the voltage and current signals and timer 0 is loaded with a predetermined 10 us period, each time the timer overflows the code increment the variable...
Hi there,
I really enjoyed your posts in this thread, absolutely informative and helpful but i have a couple of question...
I can understand the benefits of the current fed push-bull stage in terms of battery current averaging and the PCB design but designing a coil that'll pass say 100A of...
Hi DeepOne,
Can you explain in some detail the functioning of your output current sensing circuit? What is the function of the two interconnected optocouplers (PC817) and what does the 5.1k ohm resistor at the micro's side do?
Also what would the expected output power be when using a single...
Yes, large as in footprint. High wattage resistor tends to be big and hot under load, 100 degree Celsius at half or third of the rated power is irritating to me and i am sure to the surrounding parts.
As for your suggestions i'll look into them.
Thanks to you all for your help and for clarifying this aspect in the inverter design. Another question will be about the method of implementing output current sensing (or short circuit protection), i know of three techniques for measuring current:
1- Current sensing resistor in series with the...
I guess you're right so for a 12v battery, a transformer without the center tap and an H-bridge driving that the voltage ratio should be 12:325. Is that correct? (so similar to 8.5:230:-))
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Pic microcontroller using SPWM.
The circuits in the first post was used only to demonstrate the use of push-pull, half-bridge and full-bridge circuits used to drive the transformer and i stated in the first post that i am using a 50 Hz iron core transformer and a single stage converter i.e no high voltage bus.
Thanks for the...
In the circuit above (which i am sure you've seen it before) the Mosfets are all n-channel and yet the circuit uses a transformer without a center tap, how is that done? what is the method for driving the high side? Are C15 and C17 bootstrap capacitors?
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So for a 12v input...
Thank you for the detailed reply,
This wikipedia page states that for a modified square wave the RMS value is the same as sine-wave which equals: Peak/0.707.So can the same turns ratio be used for both waveforms?
https://en.wikipedia.org/wiki/Root_mean_square
Hi all,
I am in the process of designing a DC to 220v AC / 50 Hz pure sine-wave inverter which is very unoriginal of course :smile:.
Thanks to Tahmid's blog and all the great threads in this forum i collected a wealth of information about this application. Having some unanswered questions, i...
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