Hello, Great vid! Thanks for sharing! I have a question regarding common ground. I'm rectifying 110VAC and then inverting it using 4 IGBT and 2 IR2101 MOSFET Drivers. I'm also using an Arduino Micro to control the frequency. Should I connect the ground of the rectified 110V to the ground of the Arduino and Drivers power source?
Why is the sampled AC current from the resistor in the H bridge not rough (sharp spikes and drops) like the clock? How does the AC current at that point have smooth transitions from the peak of the AC waveform to the trough of the AC waveform?
Hey Austin. Great observation. This is a rough example so my apologies. The output is a PWM signal created by varying the time each transistor is off or on.. I'm working on a more in-depth example showing the actual output waveform.
@@jasonbone5121 Hey Jason, thanks for the answer. I am having a hard time seeing how there is a PWM signal replicating the AC waveform here. I definitely understand how PWM simulates AC waveforms but it does not seem as though there is enough polarity to work with to create an AC signal? Maybe I am overthinking it but since wouldn't you need the clock to have a 0 or rest value (in addition to high and low) to fully do PWM as (for example) the high side of the AC wave form would be differently timed pulses oh a high clock value ( the time of the clock being high corresponding to + amplitude) and conversely low clock value for the - amplitude. Maybe I am overthinking this.
@@Austin_crakx I don't have enough subs to have a community tab where I can upload images so see if you can view this image I uploaded to my dropbox. Might help. www.dropbox.com/home/C4EE?preview=Inverter+PWM.png
+("RNA0ROGER") This animation isn't really addressing a transformer or transformerless inverter. It's simply to show how the H bridge functions to change DC to AC.
Wait, but if the Freq Divider provides a square wave to the H bridge, and there's a square wave flowing through the resistor, then what's the point of the H bridge? Using a square wave to generate a square wave? I am not getting something here..
Gytax0 All I am addressing in this animation is the changing of DC from a PV module into AC. That is what the H bridge in the inverter is doing, changing the DC to AC.
Dear Jason, the current direction is wrong in both cases! The current shoudld come from the positive electrode of the PV panel, and flow through the transistors in the sense of the transistor arrow. Can you adapt this?
Eshta93 Thanks - I drew up the various images in photoshop and strung them together in Sony Movie Studio to make the animation. A bit primitive in execution but still works none the less.
Circuity in the inverter is monitoring the incoming grid voltage and frequency. It sends out pulses to trigger the transistors to allow them to match that freq. and ensure that the AC waveform generated is synced with the grid voltage.
What? Rectifiers change AC to DC. Inverters change DC to AC. Did you watch the video? It shows the DC (directional current) from the PV modules being turned into AC (alternating current). The video is a simplified explanation of how that inversion takes place (the H bridge).
Thanks for the comment. I realize the top to transistors should be pnp. The point was lost on you as you obviously already understand an H bridge, but thanks none the less.
Thankyou this helped me clear a Brain fart. Keep them coming😁✌️❤️🤘
Nice animation , generally people fall in problem with the changing direction in source but the actual occurs referring to load.
Thank for this ,it real helped to enhance my understanding .
Another cool video thanks for sharing god bless💓
great Animation...
great vid
Hello, Great vid! Thanks for sharing! I have a question regarding common ground. I'm rectifying 110VAC and then inverting it using 4 IGBT and 2 IR2101 MOSFET Drivers. I'm also using an Arduino Micro to control the frequency. Should I connect the ground of the rectified 110V to the ground of the Arduino and Drivers power source?
dont connect any thing from your rectifier to arduino, itll blow
good job
Thank you.
Maybe the high side won't work on h-bridge, because the voltage goes high on the emitter and the base current would turn off?
You are correct sir. I should have drawn PNP's for the top two transistors.
Maybe a revisit is in order for this animation.
Why is the sampled AC current from the resistor in the H bridge not rough (sharp spikes and drops) like the clock? How does the AC current at that point have smooth transitions from the peak of the AC waveform to the trough of the AC waveform?
Hey Austin. Great observation. This is a rough example so my apologies. The output is a PWM signal created by varying the time each transistor is off or on.. I'm working on a more in-depth example showing the actual output waveform.
@@jasonbone5121 Hey Jason, thanks for the answer. I am having a hard time seeing how there is a PWM signal replicating the AC waveform here. I definitely understand how PWM simulates AC waveforms but it does not seem as though there is enough polarity to work with to create an AC signal? Maybe I am overthinking it but since wouldn't you need the clock to have a 0 or rest value (in addition to high and low) to fully do PWM as (for example) the high side of the AC wave form would be differently timed pulses oh a high clock value ( the time of the clock being high corresponding to + amplitude) and conversely low clock value for the - amplitude. Maybe I am overthinking this.
@@Austin_crakx I don't have enough subs to have a community tab where I can upload images so see if you can view this image I uploaded to my dropbox. Might help. www.dropbox.com/home/C4EE?preview=Inverter+PWM.png
@@jasonbone5121 Oops, might be a broken link.
@@Austin_crakx Screw dropbox,let's try google drive then. drive.google.com/file/d/18ODWbtmecLlSZySNXL8PSJK-ws8goDGQ/view?usp=sharing
Does this produce a usable ac wave form just like inverts with a transformer.
+("RNA0ROGER") This animation isn't really addressing a transformer or transformerless inverter. It's simply to show how the H bridge functions to change DC to AC.
Wait, but if the Freq Divider provides a square wave to the H bridge, and there's a square wave flowing through the resistor, then what's the point of the H bridge? Using a square wave to generate a square wave? I am not getting something here..
Gytax0 All I am addressing in this animation is the changing of DC from a PV module into AC. That is what the H bridge in the inverter is doing, changing the DC to AC.
Dear Jason, the current direction is wrong in both cases! The current shoudld come from the positive electrode of the PV panel, and flow through the transistors in the sense of the transistor arrow. Can you adapt this?
Military trained, (electron theory).
which simulation program is that ? thank you very much , great video .
Eshta93
Thanks - I drew up the various images in photoshop and strung them together in Sony Movie Studio to make the animation. A bit primitive in execution but still works none the less.
@@jasonbone5121 Sometimes the simplest solutions are the best.
i have project in matlab about cascade h bridge inverter
can u help me please ?
Thanks
We start with an AC square wave. Then we alternate it through transistor pairs. The PV array sees DC.
So isn't this AC to DC?
We don't start with AC. We started with DC from the PV modules/array. That DC is changed into AC via the H bridge in the inverter.
Jason Bone what causes the transistors to switch?
Circuity in the inverter is monitoring the incoming grid voltage and frequency. It sends out pulses to trigger the transistors to allow them to match that freq. and ensure that the AC waveform generated is synced with the grid voltage.
Jason Bone where's the inverter?
What?
Rectifiers change AC to DC. Inverters change DC to AC. Did you watch the video? It shows the DC (directional current) from the PV modules being turned into AC (alternating current).
The video is a simplified explanation of how that inversion takes place (the H bridge).
thank you very much
hello ;thank you for your effort but your bridge would never work because you need a driver to command the igbt situated at the high side
Thanks for the comment. I realize the top to transistors should be pnp. The point was lost on you as you obviously already understand an H bridge, but thanks none the less.
I use Mosfets instead, a lot simpler;
IGBTs are a pain to drive, i can't do it reliably, and they are expensive.
Wrong