Home made induction heater. We have 3kW! :)

Testing home made induction heater in a bit more power. Reached 3kW in peak (not in the movie).
Problems with cooling: when water in bowl reached 70C it begins to boil in the coil. So it was emergency shutdown. I want to reach such power level to melt this damn hex nut.
My home power line is 230V one phase. To complete the test i need 3F power and more amperes. See in the movie that there is voltage drob at higher currents.
More info at www.vabolis.lt

Category:

Science & Technology

Tags:

• diy
• induction
• heater
• pll
• igbt
• driver
• furnace
• melting
• power
• high
• voltage

[Andy205ro]

what is the Hz in the coil ?

I have 100A IGBT I want to make one in the future

[savelkaunas]

@Andy205ro 105kHz. www_my_web_pages/2010/06/16/ka­itintuvo-oscilograma/

youtube didn't allow to post URL.

[themainproblem]

Since the water started to boil, does this indicate a resonance problem? Or just a flow problem with the coolant?

[savelkaunas]

@themainproblem it is too much power and coolant is too hot.

[1970Mrcreepy]

I have a few 9000 volt capacitor banks I am looking to get rid of…

[kleetus92]

@savelkaunas Simple solution, maybe you've already implemented this, but why not make it open loop? Run a line from your sink or garden hose or whatever, and put the hot end in the drain. You don't need a high flow rate, maybe a half gallon per minute?

Also, depending on your switching frequency, your IGBT may not be very happy. Most we can run them at is about 20kHz, but I'm not familiar with how this is set up. Good work though!

[ErichEnrich]

@dougspair They use this technology to melt bronze for monuments, they use a glycol/water coolant

[quaxk]

the point being?

[dougspair]

Well..commercial units use a water cooler like a TIG welder...My interest here is getting the high frequency power supply..or info on building one..??

[steve42lawson]

@savelkaunas Perhaps you could use a pump to circulate water from a tank.

[86coffeemaker]

Could a chilling system be incorperated to cool the coolant?

[timtanguay]

I do NOT envy your power bill. I bet this is making your voltage lead your current phase by a ton :) Hope you have added plenty of capacitance to bring your phases back in line.