Long time lurker, first time poster. Second year electrical engineer.
Long story short: I'm building a vacuum induction forge.
I've built my vacuum chamber, it's able to pull all the way down to 0.1mbar using a rotary vane pump. I havent started building my induction heater yet, but here are my avatible materials.
- 100x 1.8uf panasonic film capacitors. 400V
- 100x 0.1uf MLCC ceramic capacitors. SMD. 100V.
- Copper tubing (~10mm) for the inductor. *
- Atmel AVR 328
- Arduino (I've got several)
- 8x IRFP2907 N-channel power mosfets. TO247. 75V. 4.5m?. VGS min2v max4v.
- 10x 1000v 50A bridge rectifiers.
- Several different toroid cores.
- 10x 2n2222 general bjt transistors.
- 1x 2600F 2.5V ultracapacitor.
*This is the only element of the induction heater inside the vacuum chamber, it will be electrically isolated by enamel paint + electrical tape.
I have been thinking about using this schematic:
I have very modest power requirements, as the vacuum will thermally isolate the melt. Only radiation out will be energy lost from the melt. I plan on melting copper, aluminium and some stainless steel. A power level between 1-2kW would be ideal.
Water cooling will be present, should I go with this very easy zvs schematic - modified for my own needs. Or should I go for a different topology? Suggestions, still KISS, will be highly appreciated
Long story short: I'm building a vacuum induction forge.
I've built my vacuum chamber, it's able to pull all the way down to 0.1mbar using a rotary vane pump. I havent started building my induction heater yet, but here are my avatible materials.
- 100x 1.8uf panasonic film capacitors. 400V
- 100x 0.1uf MLCC ceramic capacitors. SMD. 100V.
- Copper tubing (~10mm) for the inductor. *
- Atmel AVR 328
- Arduino (I've got several)
- 8x IRFP2907 N-channel power mosfets. TO247. 75V. 4.5m?. VGS min2v max4v.
- 10x 1000v 50A bridge rectifiers.
- Several different toroid cores.
- 10x 2n2222 general bjt transistors.
- 1x 2600F 2.5V ultracapacitor.
*This is the only element of the induction heater inside the vacuum chamber, it will be electrically isolated by enamel paint + electrical tape.
I have been thinking about using this schematic:
I have very modest power requirements, as the vacuum will thermally isolate the melt. Only radiation out will be energy lost from the melt. I plan on melting copper, aluminium and some stainless steel. A power level between 1-2kW would be ideal.
Water cooling will be present, should I go with this very easy zvs schematic - modified for my own needs. Or should I go for a different topology? Suggestions, still KISS, will be highly appreciated
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