Hi Experimente 99 , I really like your inverter design. You've done a really good job. I like the idea of using freewheeling. I guess later on I will update my driver with current control too (freewheeling) and voltage control (Phase shifting) depending what I want use it for.
Thank you for your reply, I am glad you like it! Another nice idea would be a controller which controlls the freewheeling voltage reference with mains input current as feedback, you could do constant power then. Your aluminum plate levitation is really nice, I also have to try that out with 2 opposing flat coils.
Such fantastic high power induction heater, I like it so much. May i please u write a tutorial to teach us from zero to end to DIY this induction heater? Thank U very much.:)
Das ist mit großem Abstand die beste Induktionsschmelze die ich je gesehen habe! Wirst du noch mehr Videos hochladen, wo du ins nähere Detail der Schaltung gehst? Könntest du wenn möglich bitte deine Schaltpläne mit mir teilen?
Amazing... I am into creating induction heater for myself so this is beauty... I would appreciate if I could contact you maybe ? Some questions anyways: 1. You are using detuning in order to track frequency (schmitt or pll, as you must track resonance somehow right? ) and using pdm (skipping pulses) to control power delivered ? And then in between pulses you keep one of the lower mosfets on to get to the required currents ? 2. Is your pdm based on skipping pulses in symetric manner ( every other, every third, every forth and so on ) ? 4. How you generate PDM signal ? 5. Is it possible to get oscilloscope readings while device in operation ? Just a parallel snapshot of gates and tank current/voltage ? At least 2 or 4 channel osciloscope needed.. Thanks!
Echt gutes Video! Und alles so kompakt gebaut. Würde mich freuen wenn du mehr Videos machen würdest in denen du was erklärst. Denkst du mit dem Teil kann man Wolfram schmelzen?
Vielen Dank! Gute Frage mit dem Wolfram schmelzen, das müsste ich mal simulieren um zu sehen, ob das geht. Große Wolframstücke sind leider zu teuer um das so zu probieren.
Another question usually pdm modulation causes some fluctuations on dc link voltage and on zero crossing and maybe you loss soft switching (if Q level is low) how you managed this?i mean did you used same ordinary phase locked loop for tracking the resonant frequency or other methods?
The freewheeling is done via slow current decay method, one IGBT and the coresponding freewheeling diode of the opposite IGBT short out the primary of the transformer so the resonant current is forced to decay in the LC circuit. With this method I prevent charging up my DC Bus via the freewheeling diodes (fast decay). The feedback is done via a simple Schmitttrigger, so no PLL is used.
@@experimente9912 thank you for the reply and yes i got your point ...you damping the resonant circuit on off cycle of the pdm by keep turning on the on low or high side igbt and pumping the energy back to it on normal operation this can limit the resonant current but around the adjusted value not exactly on the point with a ripple around it but some times it flactuat a bit high (higher than 100 percent)on low or high Q factor .. and about the locking system i think you mean free running ocsilator with a simple Schmitt trigger right?
@@experimente9912 but the free running method should be used with some modifications because the inherent delay of this technique can loss the zvs operation and soft switching
@@MOJTABASHOMAL Yes you are correct, all the delays in the system cause loss of ZVS, but against that there is Phaselead implemented with a tunable RL circuit.
@@experimente9912 yes exactly with a lead series RL circuit on the current transformer or parallel rc with an Extra opamp we can build a negative delay segment
Hi, the DC Link capacitor is from Ebay, there are many great deals there for power electronics capacitors. The resonant capacitor is from Mouser, search for illinois capacitor LC5, they are not expensive for new resonant film capacitors compared to Celem.
Hi Experimente 99 , I really like your inverter design. You've done a really good job. I like the idea of using freewheeling. I guess later on I will update my driver with current control too (freewheeling) and voltage control (Phase shifting) depending what I want use it for.
Thank you for your reply, I am glad you like it! Another nice idea would be a controller which controlls the freewheeling voltage reference with mains input current as feedback, you could do constant power then. Your aluminum plate levitation is really nice, I also have to try that out with 2 opposing flat coils.
Such fantastic high power induction heater, I like it so much.
May i please u write a tutorial to teach us from zero to end to DIY this induction heater?
Thank U very much.:)
Incredible work
Das ist mit großem Abstand die beste Induktionsschmelze die ich je gesehen habe! Wirst du noch mehr Videos hochladen, wo du ins nähere Detail der Schaltung gehst? Könntest du wenn möglich bitte deine Schaltpläne mit mir teilen?
Amazing... I am into creating induction heater for myself so this is beauty...
I would appreciate if I could contact you maybe ?
Some questions anyways:
1. You are using detuning in order to track frequency (schmitt or pll, as you must track resonance somehow right? ) and using pdm (skipping pulses) to control power delivered ? And then in between pulses you keep one of the lower mosfets on to get to the required currents ?
2. Is your pdm based on skipping pulses in symetric manner ( every other, every third, every forth and so on ) ?
4. How you generate PDM signal ?
5. Is it possible to get oscilloscope readings while device in operation ? Just a parallel snapshot of gates and tank current/voltage ? At least 2 or 4 channel osciloscope needed..
Thanks!
Hi, amazing job! Congrats! About your DC link capacitor, can you tell what are the specs of that one you have? Thank you.
Very nice job did you mean pulse density modulation by saying pdm ?
Echt gutes Video! Und alles so kompakt gebaut. Würde mich freuen wenn du mehr Videos machen würdest in denen du was erklärst. Denkst du mit dem Teil kann man Wolfram schmelzen?
Vielen Dank! Gute Frage mit dem Wolfram schmelzen, das müsste ich mal simulieren um zu sehen, ob das geht. Große Wolframstücke sind leider zu teuer um das so zu probieren.
ما هو نوع المقطع او التذبذب المستخدم في هاذه الدارة وشكرا
I want to ask you i have one by transformer farat.i see your machin not have one wot is that
Another question usually pdm modulation causes some fluctuations on dc link voltage and on zero crossing and maybe you loss soft switching (if Q level is low) how you managed this?i mean did you used same ordinary phase locked loop for tracking the resonant frequency or other methods?
The freewheeling is done via slow current decay method, one IGBT and the coresponding freewheeling diode of the opposite IGBT short out the primary of the transformer so the resonant current is forced to decay in the LC circuit. With this method I prevent charging up my DC Bus via the freewheeling diodes (fast decay).
The feedback is done via a simple Schmitttrigger, so no PLL is used.
@@experimente9912 thank you for the reply and yes i got your point ...you damping the resonant circuit on off cycle of the pdm by keep turning on the on low or high side igbt and pumping the energy back to it on normal operation this can limit the resonant current but around the adjusted value not exactly on the point with a ripple around it but some times it flactuat a bit high (higher than 100 percent)on low or high Q factor .. and about the locking system i think you mean free running ocsilator with a simple Schmitt trigger right?
@@experimente9912 but the free running method should be used with some modifications because the inherent delay of this technique can loss the zvs operation and soft switching
@@MOJTABASHOMAL Yes you are correct, all the delays in the system cause loss of ZVS, but against that there is Phaselead implemented with a tunable RL circuit.
@@experimente9912 yes exactly with a lead series RL circuit on the current transformer or parallel rc with an Extra opamp we can build a negative delay segment
Hello
How did you get these bus and resonant capacitors? I found that many industrial things are not sold at retail.
Hi, the DC Link capacitor is from Ebay, there are many great deals there for power electronics capacitors. The resonant capacitor is from Mouser, search for illinois capacitor LC5, they are not expensive for new resonant film capacitors compared to Celem.
@@experimente9912 can you say something about circuit with resonance capacitor in primary?