What are these ferrite tube shape beads for? Will they block high frequency? I wonder if they will help protect my PS capacitors?
I wonder if I should put 2 heavy duty choke coils on the + and - side of the power supply, between the power supply and the induction heater?
The 3300 uf 50v capacitor went up is smoke first about a month ago. I replaced it with a 470 uf 200 v capacitor and it has been working fine.
Yesterday I added 2 more capacitors to the LC circuit, the Power supply capacitor went up in smoke and the bridge rectifier with small heat sink burned up.
I have seen on You Tube several people have said, the 1000v 50 amp bridge rectifiers from China self distruct at 15 amps. Several people have said put several bridge rectifiers in parallel or use higher amp diodes. Now I have 5 bridge rectifiers in parallel on a very large heat sink getting ready to do the smoke test again.
I see a circuit just like mine on You Tube the guy has 8 caps .47 uf 1000 v on the LC coil and his induction heater works much better than mine. Lowering the resonance frequency from 221 KHz to 60 KHz reduced skin effect and 8 caps increases current to the LC coil so his circuit works much better than my induction heater. I am trying to copy what the other guy has done. Not sure what other changes I should make to protect the circuit?
**broken link removed**
Is there any advantage to using 2 ferrite chokes .005 mh each on all 3 power supply capacitors?
**broken link removed**
I have changed the 2mh center tap choke coil to 8mh.
I have put 2 chokes coils 8 mh each in + and - between power supply and induction heater.
4 caps on the LC coil has lower Hz to 135 with no load and 115 with a 1/4"steel rod as the load in the LC coil.
I put a .005 mh ferrite choke on each leg of all 3 power supply capacitors.
Power supply is 15.3 VDC. Power transformer is 10.8 VAC. With induction heater ON the RF voltage is 70 volts.
So far so good, it works better than ever.
8 caps on the LC coil will lower Hz pretty close to where I want to be, target is 60 KHz with a Litz wire LC coil..
I wonder if I should put 2 heavy duty choke coils on the + and - side of the power supply, between the power supply and the induction heater?
The 3300 uf 50v capacitor went up is smoke first about a month ago. I replaced it with a 470 uf 200 v capacitor and it has been working fine.
Yesterday I added 2 more capacitors to the LC circuit, the Power supply capacitor went up in smoke and the bridge rectifier with small heat sink burned up.
I have seen on You Tube several people have said, the 1000v 50 amp bridge rectifiers from China self distruct at 15 amps. Several people have said put several bridge rectifiers in parallel or use higher amp diodes. Now I have 5 bridge rectifiers in parallel on a very large heat sink getting ready to do the smoke test again.
I see a circuit just like mine on You Tube the guy has 8 caps .47 uf 1000 v on the LC coil and his induction heater works much better than mine. Lowering the resonance frequency from 221 KHz to 60 KHz reduced skin effect and 8 caps increases current to the LC coil so his circuit works much better than my induction heater. I am trying to copy what the other guy has done. Not sure what other changes I should make to protect the circuit?
**broken link removed**
Is there any advantage to using 2 ferrite chokes .005 mh each on all 3 power supply capacitors?
**broken link removed**
I have changed the 2mh center tap choke coil to 8mh.
I have put 2 chokes coils 8 mh each in + and - between power supply and induction heater.
4 caps on the LC coil has lower Hz to 135 with no load and 115 with a 1/4"steel rod as the load in the LC coil.
I put a .005 mh ferrite choke on each leg of all 3 power supply capacitors.
Power supply is 15.3 VDC. Power transformer is 10.8 VAC. With induction heater ON the RF voltage is 70 volts.
So far so good, it works better than ever.
8 caps on the LC coil will lower Hz pretty close to where I want to be, target is 60 KHz with a Litz wire LC coil..
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