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DIY Induction Heater Builds and References

badbee

Well-Known Member
I was not precise. If I connect them without step down converter would I fry the board or it is safe to run it 5-20V?
A standard 12 V ZVS board will almost certainly fail at 20 V. They can survive on voltages lower than 12 but there may be a point where too low of a voltage will kill it as well.
 
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badbee,
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TankeyPankey

Well-Known Member
Would it be a dumb idea to not have an on/off switch? I'm thinking just plugging it in and I would be simple enough. With my current setup, there's very little chance for me to ever leave it plugged in so I'm not worried about safety in that aspect.
 
TankeyPankey,

TankeyPankey

Well-Known Member
I use the plug as a switch. I have a small heater that I plug a 3S lipo pack into. Unplugging it makes it safe.
Yeah that was kind of my thought. I could save money/wiring hassle on just plugging and unplugging the IH, which I'd be doing anyways for how I plan to use it.
 
TankeyPankey,

Gomaruana

Well-Known Member
I'm going to make a disclosure here that is for posterity.

It has come to my attention that an invention of mine has been deleted from the public Dynavap Discord. With the crap that is going on on Reddit, this is mine to make public.

There is discussion on how to make a MOD box recognize a ZVS circuit.
I am suggesting that a delay to the second FET gate input resistor would allow for a larger pulse for a MOD box to recognize a ZVS induction heater. The idea is that the delay would allow oscillation to be delayed to allow a higher amplitude of the initial 'short circuit' by avoiding oscillation for the first series of pulses, to manage an appropriate peek load in the pulse time of more mainstream MOD power supplies for 510 connections to ZVS induction heaters.

I want to make damn sure that everyone knows this is my invention as of before this day on 2/9/2023, and of the time this information was shared on the bDynavap Discord and subsequently deleted, and it is therefore mine to put in the public domain for anyone to consider. The device recommended for this operation is a : LTC6994 a one shot delay chip. It will need a 3.3V regulator. Looking forward if someone wants to try this.

If a claim is made on this invention, I expect to be named as part of the invention, period! This is my public notice.
Awesome stuff !

I'm trying to build a higher powered version that is very reliable for desktop use with the anvil vape.
Do you have any ideas on how I could achieve such a build?
Currently I'm running the standard zvs board with a 12v 10a power supply and I use a high power mosfet 5-36v 15a + arduino + temp sensor to do pid temp control.

I've been running that setup for over a year now, but I think the performance has degraded over time, do you think that is possible? Or is it violent failure or no failure with these zvs boards? I've left the power to the zvs board on for too long by accident / my hot-anvil-detection algorithm misfiring. I also think I've seen smoke come out of the zvs board on occasion, but I might have imagined that :ko:
 

TommyDee

Vaporitor
Hey @Gomaruana , the capacitor(s) could degrade over time. The standard ZVS circuit layout is extremely robust. It takes a lot to kill it.

The only smoke I've ever seen come from the components is from particles of flower or condensed oils around the coil.

There are two types of degradation, however; 1) Over-use of a specific components and 2) Different vapcaps. Some vapcaps you simply cannot push a lot of power into where other caps will rail the supply current. Measure the voltage at the ZVS board and monitor this for changes.

If you are running batteries, check that cells aren't changing their internal resistance. I have some end-of-life cells that have a huge voltage drop when firing.
 

Gomaruana

Well-Known Member
Hey @Gomaruana , the capacitor(s) could degrade over time. The standard ZVS circuit layout is extremely robust. It takes a lot to kill it.

The only smoke I've ever seen come from the components is from particles of flower or condensed oils around the coil.

There are two types of degradation, however; 1) Over-use of a specific components and 2) Different vapcaps. Some vapcaps you simply cannot push a lot of power into where other caps will rail the supply current. Measure the voltage at the ZVS board and monitor this for changes.

If you are running batteries, check that cells aren't changing their internal resistance. I have some end-of-life cells that have a huge voltage drop when firing.
I'm wondering if I can remove some wraps and cut off some of the standard coil wire length to get more power out of it?

Edit;

I found out where the smoke came from, it was from the power screw terminals on the zvs board that where a bit loose from the daily use probably.
The wire insulation was a bit blackened and the wire itself doesn't look very fresh any more.
 
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Gomaruana,

TommyDee

Vaporitor
Less coil wire length will increase the power draw. Also, be sure to solder the coil to the board. Those blue terminals are the cause of most ZVS module failures. Once soldered, these circuits are very tough.

By making the heater hotter for weak caps can cause an issue if you ever put in a very hot cap. Just a warning.
 
TommyDee,

Gomaruana

Well-Known Member
Less coil wire length will increase the power draw. Also, be sure to solder the coil to the board. Those blue terminals are the cause of most ZVS module failures. Once soldered, these circuits are very tough.

By making the heater hotter for weak caps can cause an issue if you ever put in a very hot cap. Just a warning.
Thanks for the info! I have soldered the coil and will be shortening it and soldering again as an experiment for my anvil.

Do you know by any chance what the difference is between led power supplies and switching power supplies? I'm wondering if I can use this 24v 400w one in combination with a 24v ZVS to get insane heating performance. (For this project I'm heating up a metal part with at least 4 times the amount of metal compared to an anvil)

 
Gomaruana,

TommyDee

Vaporitor
For a higher voltage ZVS, sure. A 400 watt Anvil heater would be something. Possibly a next generation solutions ;]
 
TommyDee,
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Gomaruana

Well-Known Member
Looking forward to reading about the results.
I've melted the terminals to the induction coil and the power supply doesn't seem to be able to keep up with the heater after I soldered the coil on.
I think the coil was also mismatched with the ZVS board. I used a modified coil from the smaller 12v zvs boards.

Back to the drawing table.
 
Gomaruana,

bumaye

Member
Help me with my DIY IH

I built an induction heater powered by 2 18650 batteries. I used wiring diagram from vapoven.
Somehow the power is very weak, the Dynavap heats up very slow. Too slow to use it.
Can anybody tell me what could be the reason?
Btw I’m a total noob in electronics…

Here is a picture of my build:

Legend for the picture:
1 batteries
2 induction heater
3 momentary button
4 MOSFET (not visible)
 
bumaye,

TommyDee

Vaporitor
I have not done it but this method should explain my concept for 2-cell IH's:

The coil wire length, not the number of turns, is what what determines the power draw when a vapcap is inserted. Original wire length of the coil is ~33" for a 3S solution. This normally operates at around 10.5V (to the module) at maybe 6 amps to come up with about 63 watts of power to the cap. To reduce the voltage down to 6-8.4V, you need to remove some coil wire length - 33" for 3S does calculate to 22" of coil wire length for 2S.

Do know that to reach that 60 watts, you will be putting more current through the circuit, maybe even 10A at 6V LBV or 7.2V @ 8.33A at nominal.
 

Tauwer

Member
Hi, Long time lurker just wanted to show off the abomination I made called the Jankheater. It's held together by electrical tape.

It's a half mod, 3s with the standard bms and it can be charged with USB C. Tested it out this weekend and it works fine if I heat it a bit past the click.

 
Tauwer,

expremiental

New Member
Hi all!
iam working on custom IH/stash/case/holder for Dyna and stumbled upon electronics. Planned to use ZVS but the opened my YLL 2.0 and found out its build different, like night and day electronic wise.
So now iam looking for a person to chat about IH modules schematics and stuff. iam no electric engineer : (
 

badbee

Well-Known Member
Hi, Long time lurker just wanted to show off the abomination I made called the Jankheater. It's held together by electrical tape.

It's a half mod, 3s with the standard bms and it can be charged with USB C. Tested it out this weekend and it works fine if I heat it a bit past the click.

The first rule of engineering is: if it works, it works.
 
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