Combining Powerful DC to DC Boost Converters, in Parallel!
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- Опубліковано 6 вер 2024
- This is a brief update video from our test bench as we are currently conducting a test to see if connecting two or more DC to DC boost converters in parallel will be a safe and reliable alternative to boost the power output of our comverters.
The concept is to connect the output of both converters through individual blocking diodes installed at the output of each converter.
Hi, I saw your video other video UA-cam. I would like to know if two pair of diodes are put after the DC-DC, they could be useful to isolate the DC-DC to avoid inverse current.
I saw a video where one of DC-DC failed.
Thanks for the thoughtful feedback.
Yes, two reverse currenr blocking diodes were used on the setup. I always go over my test setup in all my videos to explain the function of every component of the setup.
Were you able to watch the entire video?
Thanks for the interaction.
The Innovati0n Lab 💥
www.theinnovati0nlab.com
@@theinnovati0nlab782 Okay, I will watch it more in depth. I am not a native English speaker and I did some jumps in the video timeline. Thank you very much for replying and creating this video contents.
What specific reverse current blocking diodes did you use?
In parallele (//) you can have ONE power suply source BUT in SERIES you can not and you need 2 power suply !
Wonderful, please watch some of our test videos, I have covered this expensively.
Thanks for the feedback.
The Innovati0n Lab💥
www.theinnovati0nlab.com.
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The video seems to show it working correct? What testing is still to be done? Longevity? Efficiency? Stability?
Correct, stability, safety, reliability, and efficiency are all of the big items that I am concerned about. The concept seems to work well at low power demands/loads. But, one converter fails when the demanded power is increased significantly.
I will be making the video soon. I have just been so busy in my professional life, lately. Also, these types of experimental videos take a long time to capture....but it's all good. We are having fun doing it.
Stay tuned.
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How did you adjust the exact voltage output on both converters?
You can do it by adjusting the output current limit - when driving capacitive load or charging a battery.
However, for my tests, I use dummy resistive loads, I set the output current limit to the Max point, then slowly raise the output voltage.
Power =( V^2)/R
This means that if R is somewhat constant, varying the output voltage V will vary the delivered output power going to the resistive load.
I hope this helps.
The Innovati0n Lab 💥
www.theinnovati0nlab.com
This is a brief update video from our test bench as we are currently conducting a test to see if connecting two or more DC to DC boost converters in parallel will be a safe and reliable alternative to boost the power output of our comverters.
The concept is to connect the output of both converters through individual blocking diodes installed at the output of each converter.
Does it work sir?
Hi friend,
I am still conducting the test. It's a bit too early for me to tell. I will be making the video at the end of my test. Please stay tuned.
👍😎
So interesting, How is the final result? Any update?
I am also curious. Love your channel
Can you show full video
And requirements
And how much current does it give output when you connect parallel
One 1800watt give output 40ah
How much amps in output
If do 3 or more booster in parallel how many battery do it need to give that amount of constant current to gave at 120ah or more
This video is coming out in a few days.
It possible to parallel output without diode ?
I'd really appreciate a video on connecting converters on series, all I need is 180 vdc, still plenty dangerous of course.
Do you want to make me travel back in time, friend?..hahaha
We literally just released the video you need last week....working on the follow-on video now.
Here is the video.
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ua-cam.com/video/vcY87smODeY/v-deo.htmlsi=egiQGAK4sg-tfnz3
Watch, like, share, and stay tuned for the follow-on video.
I hope this helps with your DIY project.
Success wishes, but make sure you are being safe. High voltage DC is more lethal than AC POWER.⚠️⚠️⚠️
👍😎
The Innovati0n Lab
wonder if i can make a 350-400v converter for bench testing ev motors
It is possible. But you will need the isolated push-pull topology for that. Also, keep in mind that high voltage DC power can be hazardous. I will highly recommend looking into some high voltage rated safety PPE before embarking on such high voltage projects. Safety is always the number 1 priority.
⚠️⚡️
I hope this helps.
The Innovati0n Lab
Love it
Thanks a lot!
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If i use two DC to DC boster of 3amp,
Can i use them on 6amp?
The paralleled connection does work well at high power application. But you can give it a try. It might work for you since you are dealing with small loads.
The Innovati0n Lab 💥
www.theinnovati0nlab.com
Can you double the max output voltage?
Wonderful question.
It is possible.
See the video below.
We showed that it is possible, but the concept needs some more work.
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ua-cam.com/video/iQnXLZqpSpo/v-deo.htmlsi=Oj-WUY_NojlbWtdE
👍😎
The Innovati0n Lab
Which power diode you have used?
Will it work on dynamic load ??
MDQ150A-1600V
I am still testing the bridge rectifier, and I really can't make any recommendations for now.
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@@theinnovati0nlab782 actually I am quite used to this converter 1800 watt but the input current limitation of 35-40amps limits it's actual wattage.
On parallel with different source and with same source I faced quite a lot uneven load distribution and failure.
this for paralel connection, then what about in series connection, can it increase voltage normally ? for example aaplication of UPS that need 16x 12 Volt battery, instead only 4 battery are available
You can only connect these in series if you are using different isolated power supplies to provide input power to each individual boost converter.
@@theinnovati0nlab782 very interesting
What transistor did you use or are those diodes?
Diodes.
MUR3060PT
How do I make something like this
Please watch the full video first before deciding if you want to try it. The result was not very reliable.
I this video was made while I was testing and preparing for the full video.
What's that heat sink in the middle that red output wires connect?
Wonderful question.
You may be referring to the heatsink that has the power sharing diodes mounted on it.
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The Innovati0n Lab.
@theinnovati0nlab782 why you use diodes?
@@vahagnmelikyan2906 ua-cam.com/video/EKqIIOe_q8k/v-deo.html
You do not need diodes on output
Wonderful feedback.
Please explain.
@@theinnovati0nlab782 Look at a boost converter design
schmidt-walter-schaltnetzteile.de/smps_e/smps_e.html
A diode is integrated in the structure. Do an experiment and you'll see.
@@theinnovati0nlab782 Look at the boost converter design:
schmidt-walter-schaltnetzteile.de/smps_e/aww_smps_e.html
Diode is already there.
Diodes on output are not nesesery
Wonderful feedback.
I would like to get your opinion on it. Why do you say so?
@@theinnovati0nlab782 Please take a look the the classical boost topology, it already contains the diode no backflow current is possible. The issue with parallel connection of a typical DC converter with the current feedback circuit, usually it uses a current shunt in the negative rail. They become cross dependent and stop working normally
@hrandib
Thanks a lot for the feedback.
However, I don't appreciate it when someone decides to jump into the comment section to lecture me on something I have already explained more than a year ago. Please watch the full video and some of my subsequent ones before posting your comment.
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ua-cam.com/video/EKqIIOe_q8k/v-deo.html
I have designed converters from scratch (See tutorials on my channel), and I have made tons of tutorial videos on how to modify these converters. Telling me to go look at the 'classical topology' of any converter so I can understand the function of an output fast recovery freewheeling diode is not well received.
I essentially made this video to deter the audience from pursuing a perceived notion that connecting two asynchronously controlled switch-mode converters in parallel would lead to a doubled power output.
The major problem lies in the disparities in the loop responses of the converters, especially at high loads. The isolation diodes were added as a method of implementing some 'droop' sharing as a result parallelled dynamic impedances introduced by the external isolation diodes.......I can really write a 30-page thesis on this, but still it won't be enough.
Thanks again.
The Innovati0n Lab 💥
www.theinnovati0nlab.com
This is a very similar concept im planning yo use with a invention im creating. What im curious about is if the load doubles the heat for each individual converter or if it distributes it evenly across both converters.
Well, these are very cheap experiments to conduct.
You can watch our videos on these concepts first before doing it. Or you can just go ahead and do it for fun. Upto you.
FYI, if you watch the video we have made on this concept, you may decide not to do it.....just letting you know so I don't kill your fun and inspiration.
😊
The Innovati0n Lab💥
www.theinnovati0nlab.com