Cycle by cycle current protection is possible with average current mode control if you feed the unsmoothed signal (containing triangle wave) to a comparator.
Like always i really enjoy your video's. And this is no expection. Always learning. Do you also have a video about setting up the average model for the current mode boost converter ?
@@sambenyaakov I looked and i am trying to make it work in ltpsice but there seems to be a problem in my model. Is there anyway i could show my problem/model in ltspice ?
great video. I have doubt though. If the load is a capacitor and its a capacitor charging circuit, like a fly back capacitor charger, is it necessary to take voltage feedback from output? Anyways the output voltage is not constant nor need regulation, only final voltage matters. So can the control be just restricted to peak current sensing alone?. Or do we need to measure the change in voltage per cycle and realize controller according to that .? Thank you sir.
Hi prof. Thanks for the detailed and interesting video! Is this model relates only for CCM operation, and for DCM should make the addition for Doff expression as in voltage mode control?
Wonderful video. It's amazing to me that I don't see the use of average models in large signal transient simulations more. Your duty cycle generator block clearly enables this, but I find it astounding that it's not common place. With the exception of yourself, every time I see an average model simulation, I see it used exclusively for compensator design via bode plot, and maybe a quick transient sim of a load step to verify performance. Many times, this occurs because there is no DCG block, and LTSpice can only linearize at one point. But being able to quickly run transient simulations over very wide operating conditions (large signal) seems useful for so many applications, and time domain investigations. Why isn't the world running so many more large signal transient simulations with your average model? I simply don't understand.
Thanks Aiden. I have published in the past many papers on this approach but it did not catch. As the saying goes: You can lead the horse to the water but you can't make it drink😊
Thanks for interest and commnet/ I really don't remember now what is the reason for the 0.1. Sorry. Obviously the equation must be followed . See the referenced papers
@@sambenyaakov Thank you for your answer. I been reading your papers for a few days now, and one thing I still didn't got is: in CMC do we need to modify Middlebrook equation for Don in DCM or do I need to modify Doff only?
I really appreciate these 3 videos. A great refresher for me, explained so well. Thanks a lot !!
Great to hear! Thanks.
Thank you for the comprehensive videos x3! They’re very helpful for me.
Thanks
thank you mr professor
very good video clip
Thanks
Cycle by cycle current protection is possible with average current mode control if you feed the unsmoothed signal (containing triangle wave) to a comparator.
Sure, And you can use it with voltage mode control too. The point is that it is built in, does not need any additions.
very intuitive and insightful!!!! thanks a lot professor
Thanks
Very helpful, many thanks professor :)
Thanks
Sir. You are a genius
Thanks. Let's not be carried away😊
Outstanding Job x 3.
Thanks Hamid
Great videos, professor!
Is there any chance to share the LT spice simulation examples somewhere?
Sorry too time consuming to dig them out.
Great presentation, thank you professor!! Any chance you could do detailed overview of PS digital control and implementation?
Yes, digital control is an important subject, I do have it on my todo list.
Like always i really enjoy your video's. And this is no expection. Always learning.
Do you also have a video about setting up the average model for the current mode boost converter ?
There are several CM models in my channel. In TH-cam search box "sam ben-yaakov current mode"
@@sambenyaakov I looked and i am trying to make it work in ltpsice but there seems to be a problem in my model. Is there anyway i could show my problem/model in ltspice ?
great video. I have doubt though. If the load is a capacitor and its a capacitor charging circuit, like a fly back capacitor charger, is it necessary to take voltage feedback from output? Anyways the output voltage is not constant nor need regulation, only final voltage matters. So can the control be just restricted to peak current sensing alone?. Or do we need to measure the change in voltage per cycle and realize controller according to that .? Thank you sir.
Without voltage feedback it is basically a current source that is locked to the peak current
Hi prof. Thanks for the detailed and interesting video! Is this model relates only for CCM operation, and for DCM should make the addition for Doff expression as in voltage mode control?
Yes, correct.
👍💪🙏💖
🙏👍😊
Wonderful video. It's amazing to me that I don't see the use of average models in large signal transient simulations more. Your duty cycle generator block clearly enables this, but I find it astounding that it's not common place. With the exception of yourself, every time I see an average model simulation, I see it used exclusively for compensator design via bode plot, and maybe a quick transient sim of a load step to verify performance. Many times, this occurs because there is no DCG block, and LTSpice can only linearize at one point.
But being able to quickly run transient simulations over very wide operating conditions (large signal) seems useful for so many applications, and time domain investigations. Why isn't the world running so many more large signal transient simulations with your average model? I simply don't understand.
Thanks Aiden. I have published in the past many papers on this approach but it did not catch. As the saying goes: You can lead the horse to the water but you can't make it drink😊
Sir, do you visit PCIM in Nürnberg/Germany ?
Great presentation,
Greetings from Germany
Not this year. Thanks.
Hi prof. May I ask why @ 36:23 in Middlebrook equation you have 0.1 in denominator when it should be 0.5 according (16) at 36:28?
Thanks for interest and commnet/ I really don't remember now what is the reason for the 0.1. Sorry. Obviously the equation must be followed . See the referenced papers
@@sambenyaakov Thank you for your answer. I been reading your papers for a few days now, and one thing I still didn't got is: in CMC do we need to modify Middlebrook equation for Don in DCM or do I need to modify Doff only?
@@vasiliy5578 Only Doff