Author Topic: Induction cooktops instead of MOT?  (Read 921 times)

Offline Downunder35m

  • High Voltage Enthusiast
  • *
  • Posts: 25
  • Karma: +1/-2
    • View Profile
Induction cooktops instead of MOT?
« on: July 28, 2018, 05:42:40 AM »
I did some reading on some possible hacks of induction cooktops.
With prices for single now low as every they even worth bying just to salvage parts.
But I was thinking of a different kind of hack.
All the hacks first aim on how start the thing without the buttons then how to heat some steel with it.

An induction cooktop checks if there really is a suitable pot on it before firing up at full power.
This basically is a check for the inductivity of the entire system being within the regulating range of the drive circuit.
We could create a transformer that meets similar requirements if we would have the right core material.
Luckily these things come with a bunch of identical ferrite blocks under the coil...
Creating a proper HV secondary coil for these frequencies can't be too hard.
If we could shape the provide ferrite blocks (if required) and use the existing litz wire to form a transformer we would have around 2000W available.
Output voltage would only be limited by transformer size and isolation qualities.

But I guess there will be a really good reason why noone tried this yet, just could not find it....

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1228
  • Karma: +17/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Induction cooktops instead of MOT?
« Reply #1 on: July 29, 2018, 11:06:43 PM »
Here is my quest to hack a induction cooltop: https://highvoltageforum.net/index.php?topic=104.0

and I am stuck in doing so, because these induction cooktops are much like the microwave ovens: built dirt cheap, pushes the single mains supply to the limit and are running on the brink of destruction.

So almost any little deviation from its design will destroy the single IGBT, as the the huge inductance the circuit needs to keep the current down is almost too much for any practical situation, unless perhaps to use it as a transformer driver as you suggest. I think I did try a huge ferrite core at some point, so just make it a transformer coupled induction heater, I blew up the IGBT :)

I could have built virtually any good half- / full-bridge inverter that would do a better job in half the time I spent looking at this unit, that is another nail in the coffin, I know that RogerInOhio managed to convert it into a Tesla coil, so maybe there is some information there for you: http://4hv.org/e107_plugins/forum/forum_viewtopic.php?180812

 
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline Downunder35m

  • High Voltage Enthusiast
  • *
  • Posts: 25
  • Karma: +1/-2
    • View Profile
Re: Induction cooktops instead of MOT?
« Reply #2 on: July 30, 2018, 07:08:29 PM »
Seems I am not alone when it comes to destroy otherwise healthy induction cooktops LOL
So yes, the transformer attempt is because I am getting sick and tired of seeing them smoke if too much modified or out of specs.
Same for sticking with the driver part as it is.
Better to have the failsafe kick in too many times than constantly blowing things up.

Will have a look what I find on information before starting.
Thanks for the link!

High Voltage Forum

Re: Induction cooktops instead of MOT?
« Reply #2 on: July 30, 2018, 07:08:29 PM »

 


* Recent Topics and Posts

post Re: 500Khz Induction Heater - Need help with Driver
[Beginners]
klugesmith
Today at 06:53:02 AM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
Mysteriousduck
Today at 05:19:49 AM
post Re: 500Khz Induction Heater - Need help with Driver
[Beginners]
Mysteriousduck
Today at 04:41:22 AM
post Re: 500Khz Induction Heater - Need help with Driver
[Beginners]
T3sl4co1l
Today at 12:30:19 AM
post 500Khz Induction Heater - Need help with Driver
[Beginners]
Mysteriousduck
January 17, 2020, 11:17:33 PM
post Re: Energy and Efficiency
[Induction Launchers, Coil Guns and Rails guns]
klugesmith
January 17, 2020, 08:55:37 PM
post Re: Energy and Efficiency
[Induction Launchers, Coil Guns and Rails guns]
T3sl4co1l
January 17, 2020, 04:01:23 PM
post Re: Energy and Efficiency
[Induction Launchers, Coil Guns and Rails guns]
RobertL
January 17, 2020, 04:22:25 AM
post Re: Energy and Efficiency
[Induction Launchers, Coil Guns and Rails guns]
Twospoons
January 17, 2020, 01:37:37 AM
post Energy and Efficiency
[Induction Launchers, Coil Guns and Rails guns]
RobertL
January 16, 2020, 11:51:51 PM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Netzpfuscher
January 16, 2020, 11:59:04 AM
post Re: Easy Oscillator for Induction Heating and, Maybe Tesla Coil Power?
[Electronic Circuits]
T3sl4co1l
January 16, 2020, 02:53:32 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
acobaugh
January 15, 2020, 08:57:37 PM
post Re: Universal bus precharge & fan speed controller
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
January 15, 2020, 07:27:10 PM
post Re: Universal bus precharge & fan speed controller
[Dual Resonant Solid State Tesla coils (DRSSTC)]
acobaugh
January 15, 2020, 07:08:00 PM
post Re: Easy Oscillator for Induction Heating and, Maybe Tesla Coil Power?
[Electronic Circuits]
Mads Barnkob
January 15, 2020, 01:26:57 PM
post Re: Commercial circuit simulator Micro-Cap 12 is now free to download
[Laboratories, Equipment and Tools]
SteveN87
January 15, 2020, 12:37:28 PM
post Re: Commercial circuit simulator Micro-Cap 12 is now free to download
[Laboratories, Equipment and Tools]
Twospoons
January 15, 2020, 01:15:45 AM
post Easy Oscillator for Induction Heating and, Maybe Tesla Coil Power?
[Electronic Circuits]
petespaco
January 14, 2020, 11:19:23 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
Nicko
January 14, 2020, 10:50:54 PM
post Ebay [US] 1x CM300HA-24H H-series, 20$ for a single switch brick
[Sell / Buy / Trade]
Mads Barnkob
January 14, 2020, 08:24:10 PM
post Re: Mazilli ZVS Driver Modification Problems
[Transformer (Ferrite Core)]
T3sl4co1l
January 14, 2020, 07:36:14 PM
post Re: Commercial circuit simulator Micro-Cap 12 is now free to download
[Laboratories, Equipment and Tools]
shrad
January 14, 2020, 12:51:32 PM
post Re: Mazilli ZVS Driver Modification Problems
[Transformer (Ferrite Core)]
davekni
January 14, 2020, 05:27:11 AM
post Re: Mazilli ZVS Driver Modification Problems
[Transformer (Ferrite Core)]
Andrew321
January 14, 2020, 02:27:54 AM
post Re: Ok now I'm stuck ¯\_(ツ)_/¯
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dj.cosmo.esq
January 13, 2020, 11:42:07 PM
post Commercial circuit simulator Micro-Cap 12 is now free to download
[Laboratories, Equipment and Tools]
Mads Barnkob
January 13, 2020, 11:30:11 PM
post Re: Ok now I'm stuck ¯\_(ツ)_/¯
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Mads Barnkob
January 13, 2020, 08:22:20 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
T3sl4co1l
January 13, 2020, 02:36:04 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Hydron
January 13, 2020, 10:19:03 AM
post Re: Ok now I'm stuck ¯\_(ツ)_/¯
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dj.cosmo.esq
January 13, 2020, 09:21:59 AM
post Re: Mazilli ZVS Driver Modification Problems
[Transformer (Ferrite Core)]
davekni
January 13, 2020, 01:24:36 AM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
January 13, 2020, 12:34:48 AM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
T3sl4co1l
January 12, 2020, 09:08:17 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
January 12, 2020, 06:39:33 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
January 12, 2020, 06:33:22 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
January 12, 2020, 06:25:27 PM
post Re: A hydroelectric system getting built
[General Chat]
klugesmith
January 12, 2020, 06:23:30 PM
post Mazilli ZVS Driver Modification Problems
[Transformer (Ferrite Core)]
Andrew321
January 12, 2020, 05:36:46 PM
post Re: A hydroelectric system getting built
[General Chat]
Uspring
January 12, 2020, 01:35:20 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
January 12, 2020, 06:21:10 AM
post Re: A hydroelectric system getting built
[General Chat]
plasma
January 12, 2020, 05:01:29 AM
post Re: A hydroelectric system getting built
[General Chat]
klugesmith
January 12, 2020, 04:02:42 AM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
AstRii
January 12, 2020, 03:29:15 AM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic Circuits]
petespaco
January 12, 2020, 03:18:17 AM
post Re: A hydroelectric system getting built
[General Chat]
plasma
January 12, 2020, 02:03:03 AM
post Re: A hydroelectric system getting built
[General Chat]
klugesmith
January 12, 2020, 01:53:35 AM
post A hydroelectric system getting built
[General Chat]
plasma
January 11, 2020, 11:26:31 PM
post Re: Silicon Carbide MOSFETs in a small Tesla coil
[Solid State Tesla Coils (SSTC)]
Weston
January 11, 2020, 10:36:17 PM
post Re: Strange oscillations
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
January 11, 2020, 08:01:13 PM

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 
SimplePortal 2.3.6 © 2008-2014, SimplePortal