Cheap PushPull Power Boost Inverter Modules, Schematics, Details, Testing
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- Опубликовано: 4 окт 2024
- This Video is again about a cheap module that I use for it's Transformer only.
It uses a Powerful 500w (or so) EC42/21/20(15) PC40 Ferrite Core, the Transformer is designed for delivering up to 380V from 12V(or 24V) in PushPull Configuration. I intent to use the Transformer for the Modular High Voltage Tube Power Supply design I presented the in a Previous Video. I reverse Engineered it long ago and today I want to share the Design of this little China Inverter Module along with Details on the Schematic.
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The clean square wave with NO RINGING is amazing!
Hello from Ottawa, Ontario, Canada Konstantin! Your informative videos continue to fascinate us. WE like your presentation format and the close-ups reveal good details. You speak intelligently and your presentation is very logical. We enjoy how you patiently read through the schematic diagrams with explanations and provide actual set-up details and live measurements. Excellent work!
Hi Luc, Thankyou very much and Greetings from Vienna/Austria!
You say "WE" , you mean more of your friends watch my Videos ? Cheers from a little to warm Vienna :-)
@@KonstantinGrigoriadis I think Luc is taking a bit of liberty and speaking for most of us other watchers who also appreciate your videos, I don't mind someone thanking you in my name.
Thankyou!
Hello Kalle, Thankyou!
Konstantin, You are a great engineer! Thank you!
Thankyou!
6:52 i have the same inverter module but with the double output. Not yet tested, but you mentioned in your previous video to replace the capacitors with some more reliable ones. So that will be the first thing that i'm gonna do before i start experimenting with it. I don't want Cape Canaveral on my bench :-)
Your own design is a very nice design and will be much more reliable. Thanks again for this great video. Grtz
Hi Bjorn, Thankyou ! Yes replace the 2 caps with 450 or 550 V ones for peace of mind. Cheers, Konstantin
Thanks for your detailled explanations ! 👍👍👍
Thankyou !
Thanks for the video and I look forward to the next one.
Cheers Dave.
Thankyou Dave !
Yasou Ntino! Nice video with lots of details as always. Before you use these transformers for your project, I would highly recommend you to dismantle one and check if they use copper wire and most importantly if they fulfill the basic isolation standards for your own safety. I have seen Chinese transformers without margin tape at the ends and with primary and secondary windings overlapping each other at the end of the bobbin and because they want to make them even cheaper, they use copper coated aluminum wire which will increase the losses quite a lot.
Giasou Thoma, Thankyou!
1) I have done that already (I dismantle everything 🙂) and the Isolation was ok 2 layers of Tape Between between Pri/Sec in more layers, no overlapping Pri/sec without tape. Please condider, that in this Design we do NOT Deal with Mains Reference or Rectified Mains, what would make it Safety Critical, its an PushPull from 12V! Even if something goes wrong (Short Pri/Sec), the Primary Circuitry will fail(Destroyed) and that's it! I no see any elevated Safety issues here except at the working end of the PSU (High Voltage)! Further these Transformers are used in the Majority of the Commercial low-cost CN Inverters !
2) Regarding CU coated AL, well that's how it is, again in the Majority of the Asian Magnetics used even in Brand name PC PSU's, this is something we have to live with. Expecting for that Price a pure copper Magnetic is probably illusion.
Further this is NOT a commercial Design.
Cheers,
Konstantin
I also use those modules for parts to make HV power supply for home made vacuum tube amplifiers.
Hi Joseph, did you finished it ? what are the Specs of your PSU ?
@@KonstantinGrigoriadis I just made it to the breadboard stage before finding one of the 150 watt inverters like you had in the video. Mine was TL494 based, But I was having trouble finding fast rectifiers for the voltage I was making. 1N4005 diodes worked, but would heat up. The 150 watt inverters had the rectifiers, so a little good filtering and I was set. My amplifiers are low powered so I barely loaded the PSU.
Hi Joseph, the 1N4xxx are to slow(trr Recovery time) that's why they heat up, you need Ultrafast ones like the UF4007 (NOT 1N4007) are for 1kV 1A 75nS rectifiers. I use UF5408 same Ultrafast 75nS but for 3A for Currents less that 1A and Through-hole. The onboard one are ok but not for 100-150W.
Cheers, Konstantin
@@KonstantinGrigoriadis I finally bought some from amazon, but by then was using the 150 watt inverters. I make these audio amplifiers from strange parts.. I have used horizontal output tubes as finals. I was driving thermostat transformers as output transformers. They are 480vac to 24 vac. and I used neon lamps as voltage regulator for the screen voltage. Oddly enough, it sounded wonderful. It makes approximately 3.5 watts per channel.
Sounds like a interesting project! How are the inverters performing noise-wise ?
HY1906 is not from Hynix. It's made by Hooyi Semiconductor in China. It produces incredibly cheap power Mosfets.
Hi Yes I realised the misnaming at the moment I said it :-) but I couldn’t remember the Brand even that I use it a lot, I get them from lcsc. Cheers, Konstantin
Thanks for the video. What are the additional features you would include in this project to transform this device into a regulated 0 to 220 Vdc power supply ?
Thankyou, Isolated current and voltage regulation, short circuit protection primary and secondary side, output voltage doubler, 2nd stage Filtering
Thank for this vital information
Please My question is that can the output watt be increased by adding more MOSFET and changing the transformer
Hello, thankyou, yes but if you add more mosfets you need a dedicated dual gate driver too, cheers, Konstantin
Hi Konstantin! Another great video! I have a question: When the SG3525 works at 50% duty does the flux balancing of the core happen naturally?
Hello Thankyou, this depends on how good the Transformer is Designed and Build, how good the Mosfets are matched (RDS ON) and the DeatTime . Otherwise it could lead to transformer saturation.
Thats the thing - nobody bothers with flux balancing, you'll need proper peak or average current control for that.
U da man 👍 Very nice videos. Do you do custom power electronics for clients and if so what would be the best way to contact you about that?
Hello, Thankyou, I do custom projects, but not at the moment bcs to many in the queue . Cheers, Konstantin
Btw. you can always contact me via my Email, that is in the Description Tab of my Channel.
@@KonstantinGrigoriadis I don't see an email there that's why I am asking. And I am not really in a hurry, just thought you are perhaps a good match for what I might need, so I am willing to wait...
This man really hates winding transformers lol
:-) Yes because always Unikates are created so, I want to make designs repeatable and as easy as possible.
Thanks brother for work, but can you send me the 200watt inverter details which you mention in the video
Thankyou, but what 200w inverter you mean ? I didn't said anything about a 200W Inverter.....At what time in the video ?
@@KonstantinGrigoriadis sorry Brother i misunderstood u
Do you have an ebay/aliexpress link to these products?
Hi, search on ali for „500w inverter board“ cheers, Konstantin
Why you haven't included overcurrent/current limit?
It's already included in the IC.
(The same for voltage stabilization)
what do you mean ??? Include it where ? the schematic I show is a reverse Engineering of the China Module, not my Design, it has no regulation at all... its open loop. My Design will have U/I regulation with High Side Current Sensing and is not based on a SG3525.