Electronics Tutorial - Common Power Factor Correction methods 

Great one ... You summarized it professionally

Congratulations .. !! just simple and easy to understand. Why didn't my teachers teach it to me this way?

I often wondered how PF was correct. Absolutely fascinating and clear, many many thanks.

Such a great video! Thanks so much! You really show how complicated concepts can be shown easily! That is what is needed in education nowadays! No academic ego and ridiculous difficult papers to read for the sake of publishing! Congratulations

Instead of using a passive inductor(also called a choke), you could also use something called a gyrator. Also called an active inductor. Probably not as efficient as the switching PFC version, but at least you don't need such a big inductor. Maybe also nice to add is when you're supposed to officially use PFC. There are some regulations for that. But basically for consumer electronics everything under 75W is fine (very rough, there go a lot of details into that) Nice video as always 👍🏻

excellent demonstration of power factor issues with really good real examples! Many thanks!!

Excellent. Very well explained. I would love to see a part two where you look in depth at some commercial implementations.

Very good video as always, thanks a ton for your efforts. But one suggestion is to show us what have you connected using a circuit diagram whenever you are using circuit demo so that newbies me can follow you properly.

Very professional video! Thanks for your help figuring out why BOOST is required for PFC. You save my hair a lot.

Thank you, very informative!

Brilliant way to present it!

Great tutorial, thanks for sharing!

From the explanations I have watched so far, this one is the best.👍👍

Nice video, quite confusing see the PFC with electronics at the first time, but this video is clear and simple.

So good explanation and examples!!! :)

great vid buddy! helped me a lot!

love your work nice

Great!! Really good explanation!

excellent description

Excellent work 👍

Brilliant explanation! Thank you so much!!!

Awesome explanation!!!

Excellent video. Hats off. 🇲🇫

Awesome video! THank you!

Awesome and cool explanation 👌👌

Excellent work 👏 👍

Exellent explanation!!!

Fantastic explanation .. Thank You for sharing... Cheers :)

Thanks a lot for the wonderful explanation, if it is possible to demo this circuit that would be great.

Very good sir

Many thanks Sir

very good.

now i understand better the power factor correction method

very nice

Thanks for the Video, was helpful. Could you please provide calculation of L and C in passive PFC?

Great Video, I am working on simulation of EV charger and being a new user of LT spice is facing the problem in achieving the upf operation of AC-DC stage which utilize Current Source Rectifier. Would help me a lot if you could make a video on its simulation.

Sehr gut

Thank you for your explanations. One question regarding EN61000-3-2 standard: How can I measure (plot) a curve Y= normalized harmonic current = f(x), with x = Harmonic number, using LTspice ? Thank's in advance Udo

Hi Dear., Thaks for your effort to do the best of this point in youtube. but my Question is about Active PFC case, l had a IR2520D IC Model for Ballast Design but it has 0.6 PF Ratio but l need to increase its PF ratio to acceptable level such as 0.9 and over. How can l do that with your support?

👍👍 Thanks

Measuring the power factor of my PC with one of these Aliexpress power meters and it gives me around 0.7. Wonder if it is really that low because I have a bad power supply in the PC, or the power meter is not measuring it correctly.

Don't know what i'm doing wrong, but i can't see the power factor in my error logs :/ EDIT: Alright, got it. Of course you can't see the PF when you do the .four operation on the chokes current :)

Can you do something with totempole PFC with control logic?

Which model using oscilascope

can you share the LT spice files for this

V2 is 600 Hz?? I changed it to 50 Hz, not happy anymore!!

When a baby is born the doctor should also hand over an oscilloscope so that the child can understand electronics better when they grow to adulthood.

why the electrolytic capacitor didn't explode

which color is which current? PLEASE LABEL THEM IN THE CIRCUIT!! or at minimum SAY WHICH COLOR IS WHICH.

Yeah, okay, HOW DOES IT WORK! here's my understanding. Problem statement: A simple rectifier into capacitor power supply draws current only when the incoming sine wave happens to have a higher voltage (plus 2 diode drops) than the capacitor. At that moment, the capacitor starts charging and its effective resistance nearly zero thus current demand is very high, but only for a few milliseconds. Solution statement: Find a way to spread out that spike that happens 120 times per second; find some way to extract energy from the entire sine wave not just the peaks. The magic smoke is a FLYBACK regulator; known here as a boost regulator but it depends on the flyback effect of the inductor. This is the same phenomenon that generates the spark in your gasoline powered internal combustion engine. For a few microseconds, the inductor is *shorted to ground* which seems like a bad thing but while shorted to ground it is building a magnetic field. Then you suddenly open that path to ground. The magnetic field starts to collapse. It wants to push electric current in the same direction that it has been flowing. What is special is that it does not care about voltage; it will push X number of electrons up a very steep hill if necessary. So, even though the capacitor already has 300 volts on it, and you charged the inductor at a moment where the incoming sine wave had only 20 volts, when you interrupt the ground path, the inductor will push 20 volts no matter what; making a spark if it needs to. It pushes that 20 volts right onto the 300 volts already on the capacitor and THAT is how you glean energy from the 20 volt (or any volt) portion of the incoming sine wave and scoop it up on top of your storage capacitor. Detailed nuance: We don't actually fully charge the inductor, that would be bad, and we don't completely dump the charge either. So we "top off" the capacitor with these little impulses that RIDE the incoming wave. It is by its very nature current limited since the thing that charges the main storage capacitor is the FLYBACK impulses from the inductor. The crossover distortion will happen because at some low voltage part of the sine wave there just is not enough TIME to charge the inductor. (RL time constant) and consequently even with nearly 100 percent duty cycle you cannot effectively boost to the 300 volt capacitor. Conversely, when the incoming wave is at its peak, we allow the inductor to conduct for only a few microseconds; it doesn't need much high-voltage pulse to charge its magnetic field.

You need a sleep man.