Hello.
I am trying to come up with a 2kW induction heater which uses the attached 48Vdc/3kW psu.
This is to be used with a water cooled copper coil. The circuit inductance is 3uH because the solenoid coil will have a 12cm diameter, 6cm length, and about 4-5 turns... and it will use a capacitor bank of 3 x 0.3uF MKP capacitors (1600Vdc) which gives a resonant frequency of about 100kHz.
I need the frequency to be high because this is to be used to heat up Iron micron sized particles to around +150 degrees
1. The problem is my PSU is 3kW and I have used 48Vdc with a series resistance of 0.8 ohm to simulate this but in the simulation the output without load is showing around 12kW peak initially and a steady 6kW output (which I do not know how it is possible if my power supply is only able to provide 3kW).
2. Will this initial peak be a problem?
3. Is it necessary to cascade the mosfets as I did or just using two beefy Fast switching mosfets can do the job?
4. Does this circuit seem okay or any improvements I can make?
5. The components chosen for the schematic are not fixed (Used because I had the models available in my library so if anything needs to be replaced I can do that).
6. I am currently also simulating with a load of 1mOhm series resistance but I do not know how accurately this models micron sized powder if anyone can also help with this?
I am trying to come up with a 2kW induction heater which uses the attached 48Vdc/3kW psu.
This is to be used with a water cooled copper coil. The circuit inductance is 3uH because the solenoid coil will have a 12cm diameter, 6cm length, and about 4-5 turns... and it will use a capacitor bank of 3 x 0.3uF MKP capacitors (1600Vdc) which gives a resonant frequency of about 100kHz.
I need the frequency to be high because this is to be used to heat up Iron micron sized particles to around +150 degrees
1. The problem is my PSU is 3kW and I have used 48Vdc with a series resistance of 0.8 ohm to simulate this but in the simulation the output without load is showing around 12kW peak initially and a steady 6kW output (which I do not know how it is possible if my power supply is only able to provide 3kW).
2. Will this initial peak be a problem?
3. Is it necessary to cascade the mosfets as I did or just using two beefy Fast switching mosfets can do the job?
4. Does this circuit seem okay or any improvements I can make?
5. The components chosen for the schematic are not fixed (Used because I had the models available in my library so if anything needs to be replaced I can do that).
6. I am currently also simulating with a load of 1mOhm series resistance but I do not know how accurately this models micron sized powder if anyone can also help with this?
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