ZVS 1000 Watt Induction Heater, Power transfer Outside of the Workcoil, Part 2,

[@MrOldclunker]

Good test! Thanks

[@who_cares848]

Nice e-nail setup lol

[@dalenassar9152]

...just saw this video right after leaving a suggestion on part 1 a few minutes ago. Adding to that comment, I thought I should mention that magnetic flux is always maximum at the center inner EDGE of the coil against its middle inner ring This locus of max power points describes a CIRCULAR RING centered in the workcoil. If you imagine a thin CIRCULAR DISC placed in the coil center, my theory says that heating would be max at the outer perimeter and decreasing in strength, reaching the MINIMUM flux on the circle at it's center. And for ALL cases the flux is MINIMUM at the center axis!! This implies that inserting a metal rod down the center axis places it in the WEAKEST field. Along ANY axis of the workcoil the center axis is weakest and weakens further as you move toward either end of the workcoik! In fact, the field at the very ends of the center axis of the coil are EXACTLY 1/2 that of the center of the center axis. THANKS AGAIN...hope you can demonstrate this. I will be able to put this theory into action in a few days...hopefully.

[@dalenassar9152]

Another thought just came to mind...I saw the impressive heating power of some of your coils. Also I noticed that in many videos involving melting metals in a crucible, that a small cover is placed over the crucible to hold in heat...this cover get visibly burnt quite quickly. I think that maybe if a piece of very thin metal sheet (rather than some kind if fiber or whatever is used) is simply placed over the workcoil top (maybe before the coil even has time to become hot) and the unit turned on, perhaps the heating flux variation may become apparent in the discoloration pattern of the thin metal sheeting. I don't know if the effect will show clearly, as this would a weaker flux interaction. --dALe

[@eltayebprintinghouse3620]

Hello sir Thank you for all the great videos I have a question, is it possible to combine 3 units with a power of 1 KW with each other to produce 3 KW?

[@frenchcreekvalley]

Thank you for your kind words! I do not know the exact answer to your question, but I think it would be difficult to do. However, this style of unit is available in output powers up to 3000 and 4000 watts. Here is one example: m.aliexpress.com/i/2255800017620563.html?gatewayAdapt=4itemAdapt And, of course, many sellers have the 2500 watt units, like the ones that I use: www.amazon.com/Induction-Heating-Machine-Frequency-Players/dp/B0B4BDVHMG/ref=asc_df_B0B4BDVHMG/?

[@eltayebprintinghouse3620]

​@@frenchcreekvalley thank you for your interested

[@hedefeKrK]

If I purchase a 1000 watt pre assembled induction heater, will it melt brass?

[@frenchcreekvalley]

Answer: Yes, but not a lot. With the 2500 watt unit, I have melted as much as 540 grams of copper in a graphite crucible and, since brasses melt at somewhat lower temps than does copper, you could melt a bit more. But, for the 1000 watt unit, which i haven't tested for melting copper or melting volumes of brass, my guess is that you could probably melt 200 grams (or a bit more) of most brasses, again in a graphite crucible. If you need more detail, feel free to ask.

[@hedefeKrK]

@@frenchcreekvalley thanks for the answer and offering help, sorry for the long message. I want to melt brass. Copper will be good but not a must. 2500w version: I can not find a power source to run it. (There are some national export limits here as tax free, low tax and so on.). 2500w power supply costs 4-5 times of the heater it self. 1800w version: it has a reasonable price with a 48v 31.3 amp power supply. Internal diameter of heating coil is 70mm and I can find crucible for the size. Only problem is, I hesitate that these metal case power supply will provide 31.3 amp contiously. 1000w version: Both price and power supply are cheap and easy to find. Most important problem is: internal diameter of heating coil being 30mm. I couldnt find a matching crucible. What will be your suggestion?

[@frenchcreekvalley]

@@hedefeKrK I understand your concern about price and size of induction heater. II have had good luck with one of these for my 2500 watt unit: www.aliexpress.us/item/3256802439467524.html? Emerson R48-2900U communication power supply maintenance module, 2900W high-power rectifier DC charging module 50A Regarding coil diameter: The 1000 watt units that I use come with work coils that are around 50 mm in ID. Here is but one of many sellers of the type of graphite crucible that I use: www.aliexpress.us/item/3256804144780881.html? For your other questions, I suggest you check out some of my induction heating web pages starting at: spaco.org/Blacksmithing/ZVSInductionHeater/1000WattZVSInductionHeaterNotes.htm