Always appreciate when you share your vast knowledge on these useful ZVS devices -thank you! For those who don't already know, this author has a virtual library on his experiences using ZVS heaters, especially the 1 to 3KW varieties -check out the playlist in the description if interested.
You are THA MAN!!! I really appreciate all of your information and presentation. Anyone watching can see your passions, not only with induction circuits but also in educating those wise enough to take advantage. Sharing your knowledge, especially what you feel is note worthy, is a true gift to us all. Thank you! Sure it is IMPOSSIBLE to give you the recognition and thanks you deserve, the world would be a better place with more people like you.
Cooling with a bucket of water without a fan, works ok. Refresh the water after a couple of sessions, which keeps it clean. Coils without sleeves works ok, provided you don't touch the coil: use the outer crucible without the inner graphite crucible. Power meter on the mains works ok (15euro in China), because the efficiency of the ZVS circuit is very high (above 90%).
You hit the nail on the head. These induction heaters are fantastic tools for heating metals up quick, but that's it IMHO. I actually needed more watts per pound of copper to melt, as did my well insulated resistor furnace. The crucible-in-coil-setup radiates heat away like hell. So a 3 kW zvs induction heater saved me maybe 30 min of time when melting 2 pounds compared to my 1.8kW resistor heated furnace, but at the cost of constant water cooling, enduring them noisy fans and the electronics run damn hot nevertheless. I'd stick to traditional electric heating
Hi, great video thank you. I'm curious, the coil you show initially is double wound (2 layers of coils)????, please can you advise what the difference is compared to a single layer wound coil?
I think that coil is actually 3 layers of 3 turns for a total of 9 turns. The main object there is to confine the power to as small an area as possible so as NOT to heat the whole cartridge casing; just the neck. A secondary reason is to keep the coil's inductance high enough to keep the resonant frequency LOW enough to keep from damaging the Mosfets and some of the other components.
@@frenchcreekvalley many thanks for your kind reply....so you would use the same for heating a larger item I.e. 4 inches in diameter???? Also what effect have you found by using a smaller diameter copper pipe that you form into a coil vs a larger diameter pipe....obviously you'll get less turns with the larger???
@@lukebrown6913 Please spend some time reading this webpage of mine, and then, if you still have questions, feel free to ask: www.spaco.org/Blacksmithing/ZVSInductionHeater/WorkCoilsForZVSInductionHeater.htm Especially study the Work Coil Data spreadsheet that is linked on that page.
M'well i search for hints on the "poor" aspects and found none i was expecting. As for what IH Driver are "good for" i'd just refer to JAi's (Induction) « Curie Point Pyrolyzer » patent of 1969... Power and flux density are nice but such alternative applications based on the JAi "PyroFoil" only require to inject an energy burst lasting no more than a few seconds, with the Curie temperature ceiling actually setting precisely the amount of temporarily-stored energy, by virtue of a simple principle involving a susceptor's specific heat capacity, Curie point and mass, a i recall. I predict the potential of this fault-tolerant/reliable will allow novel improvements long awaited relatively to smoker health-wise alternatives, to finally address the pitfalls of e-Cigs which ain't garanteed to be without risks, quite on the contrary. Hot-red melted metal may attract and entertain but that's only a begining and i ain't commenting on distributing/spreading electrical stresses through flux-concentration + multiplication of magnetic poles, for example. In any case, instead of 1 single big so-called asian "module" i'd much prefer synchronized magnetic parallelism of multiple identical daughter-boards, still with tiny pinch magnetic vectors except many more and since that would be in sync with a local reference clock i figure it might invite "scanning"/"probing" of a susceptor workload to evaluate/measure its state/parameters. Bending the flux lines in a concentric arrangement à la stepper motor in a 6-poles stator setup (no rotor, only a workload susceptor inside instead) will produce as many magnetic vector, piling up 2 identical units would add 6 more vectors plus 6 virtual ones vertically, raising the number of synchronized samples to 18... Which makes me wish the topic of IH Driving could move on, starting with making the power-stage self-protected, possibly some day using Allegro's ACS733 hall-effect current-sensing chip with Analog & Digital (resistor-programmable comparator) outputs, or some future equivalent... Etc.
Always appreciate when you share your vast knowledge on these useful ZVS devices -thank you! For those who don't already know, this author has a virtual library on his experiences using ZVS heaters, especially the 1 to 3KW varieties -check out the playlist in the description if interested.
You are THA MAN!!!
I really appreciate all of your information and presentation. Anyone watching can see your passions, not only with induction circuits but also in educating those wise enough to take advantage. Sharing your knowledge, especially what you feel is note worthy, is a true gift to us all. Thank you! Sure it is IMPOSSIBLE to give you the recognition and thanks you deserve, the world would be a better place with more people like you.
Thank you for your kind words.
Cooling with a bucket of water without a fan, works ok. Refresh the water after a couple of sessions, which keeps it clean. Coils without sleeves works ok, provided you don't touch the coil: use the outer crucible without the inner graphite crucible. Power meter on the mains works ok (15euro in China), because the efficiency of the ZVS circuit is very high (above 90%).
Very informative video
Thank you for taking the time to make the video and share your findings.
You hit the nail on the head. These induction heaters are fantastic tools for heating metals up quick, but that's it IMHO. I actually needed more watts per pound of copper to melt, as did my well insulated resistor furnace. The crucible-in-coil-setup radiates heat away like hell. So a 3 kW zvs induction heater saved me maybe 30 min of time when melting 2 pounds compared to my 1.8kW resistor heated furnace, but at the cost of constant water cooling, enduring them noisy fans and the electronics run damn hot nevertheless. I'd stick to traditional electric heating
Hi, great video thank you. I'm curious, the coil you show initially is double wound (2 layers of coils)????, please can you advise what the difference is compared to a single layer wound coil?
I think that coil is actually 3 layers of 3 turns for a total of 9 turns. The main object there is to confine the power to as small an area as possible so as NOT to heat the whole cartridge casing; just the neck. A secondary reason is to keep the coil's inductance high enough to keep the resonant frequency LOW enough to keep from damaging the Mosfets and some of the other components.
@@frenchcreekvalley many thanks for your kind reply....so you would use the same for heating a larger item I.e. 4 inches in diameter???? Also what effect have you found by using a smaller diameter copper pipe that you form into a coil vs a larger diameter pipe....obviously you'll get less turns with the larger???
@@lukebrown6913 Please spend some time reading this webpage of mine, and then, if you still have questions, feel free to ask:
www.spaco.org/Blacksmithing/ZVSInductionHeater/WorkCoilsForZVSInductionHeater.htm
Especially study the Work Coil Data spreadsheet that is linked on that page.
M'well i search for hints on the "poor" aspects and found none i was expecting. As for what IH Driver are "good for" i'd just refer to JAi's (Induction) « Curie Point Pyrolyzer » patent of 1969... Power and flux density are nice but such alternative applications based on the JAi "PyroFoil" only require to inject an energy burst lasting no more than a few seconds, with the Curie temperature ceiling actually setting precisely the amount of temporarily-stored energy, by virtue of a simple principle involving a susceptor's specific heat capacity, Curie point and mass, a i recall. I predict the potential of this fault-tolerant/reliable will allow novel improvements long awaited relatively to smoker health-wise alternatives, to finally address the pitfalls of e-Cigs which ain't garanteed to be without risks, quite on the contrary.
Hot-red melted metal may attract and entertain but that's only a begining and i ain't commenting on distributing/spreading electrical stresses through flux-concentration + multiplication of magnetic poles, for example. In any case, instead of 1 single big so-called asian "module" i'd much prefer synchronized magnetic parallelism of multiple identical daughter-boards, still with tiny pinch magnetic vectors except many more and since that would be in sync with a local reference clock i figure it might invite "scanning"/"probing" of a susceptor workload to evaluate/measure its state/parameters.
Bending the flux lines in a concentric arrangement à la stepper motor in a 6-poles stator setup (no rotor, only a workload susceptor inside instead) will produce as many magnetic vector, piling up 2 identical units would add 6 more vectors plus 6 virtual ones vertically, raising the number of synchronized samples to 18... Which makes me wish the topic of IH Driving could move on, starting with making the power-stage self-protected, possibly some day using Allegro's ACS733 hall-effect current-sensing chip with Analog & Digital (resistor-programmable comparator) outputs, or some future equivalent... Etc.