Your induction oven is very interesting, more than others I've seen on the web congratulations I try to build mine here in Mexico please explain a little your design First, I understand that you use a parallel tank circuit to get the great linear load - current advantage A disadvantage for LCLR and resonant series topologies Going back to your circuit I see that through your tank circuit a great current flows and I think it is illogical that this current passes through your igbt modules, so I can assume that after your inverter you have a first resonant circuit ... Which gives the advantage that the inverter sees a purely resistive load and the voltage and current is sinusoidal. Also will help that the currents through the igbt module are not so high This first circuit has a variable coil and a capacitor which will have the same resonance frequency as the parallel tank circuit If the frequency of the parallel tank circuit varies by the temperature of the workpiece the first circuit will vary its inductance so that both return to the same resonance frequency If I'm right in my assumptions please explain me The first tank circuit is a rlc series circuit? Or what type of circuit is Another big question is How do you connect the two tank circuits? In series the first with the second Or do you use any other element between them? The power resistors you have connected are for what Current limiters in the first resonant circuit. ??
Gaby Rangel thank you as you guessed the variable inductor changes for tracking the parallel resonant . first circuit after the inverter is a lc serios resonant with variable inductor that connected in serios with a parallel lc(power cap + workcoil) i used power resistors and a zener diod for measuring the lc tank woltage
Hello I want to build a 3 kw home induction heater Thanks for the explanation in the previous message I just can not understand how the high power part is connected You tell me that the inverter is connected in series to the series resonant circuit and this circuit is connected in series to the parallel resonant circuit Please teach me a circuit or electrical diagram to not connect badly and burn igbt
Gaby Rangel hello doning this project needs some basic knowledge about electronics and power electronics i use a half bridge inverter that feeds a serios-parallel resonant if you dont know about basics of half bridge inverter you can find it easily on google
If you need to measure current in your tank circuit you can make the following ideas Pretty good 4hv.org/e107_plugins/forum/forum_viewtopic.php?149708.post
ته بوته در رفت ؟
آقا مجتبی چی بود توپولوژی این مدار شما ؟
بوته رو با چی درست میکنید ؟
why the motor is working?
Gaby Rangel
this heater uses active impedance matching with variable inductor
Your induction oven is very interesting, more than others I've seen on the web congratulations
I try to build mine here in Mexico please explain a little your design
First, I understand that you use a parallel tank circuit to get the great linear load - current advantage
A disadvantage for LCLR and resonant series topologies
Going back to your circuit I see that through your tank circuit a great current flows and I think it is illogical that this current passes through your igbt modules, so I can assume that after your inverter you have a first resonant circuit ...
Which gives the advantage that the inverter sees a purely resistive load and the voltage and current is sinusoidal.
Also will help that the currents through the igbt module are not so high
This first circuit has a variable coil and a capacitor which will have the same resonance frequency as the parallel tank circuit
If the frequency of the parallel tank circuit varies by the temperature of the workpiece the first circuit will vary its inductance so that both return to the same resonance frequency
If I'm right in my assumptions please explain me
The first tank circuit is a rlc series circuit?
Or what type of circuit is
Another big question is
How do you connect the two tank circuits? In series the first with the second
Or do you use any other element between them?
The power resistors you have connected are for what
Current limiters in the first resonant circuit. ??
Gaby Rangel
thank you
as you guessed the variable inductor changes for tracking the parallel resonant .
first circuit after the inverter is a lc serios resonant with variable inductor that connected in serios with a parallel lc(power cap + workcoil)
i used power resistors and a zener diod for measuring the lc tank woltage
Hello
I want to build a 3 kw home induction heater
Thanks for the explanation in the previous message
I just can not understand how the high power part is connected
You tell me that the inverter is connected in series to the series resonant circuit and this circuit is connected in series to the parallel resonant circuit
Please teach me a circuit or electrical diagram to not connect badly and burn igbt
Gaby Rangel
hello
doning this project needs some basic knowledge about electronics and power electronics
i use a half bridge inverter that feeds a serios-parallel resonant
if you dont know about basics of half bridge inverter you can find it easily on google
If you need to measure current in your tank circuit you can make the following ideas
Pretty good
4hv.org/e107_plugins/forum/forum_viewtopic.php?149708.post