(By the way I just noticed today that this post existed, as I’m siting here working on the latest model.) Tom, thank you for the comments and the intelligent questions. ![]() But I doubt that 115 A is common in the USA for non-industrial power circuits.īut maybe this was only a test setup and the final design uses a purely resistive operation mode with a line input filter cutoff frequency above 50/60 Hz but below the RF output frequency range? I only know the situation for the 50Hz regions of the world where 3x 63A at 230/400 Hz three-phase is the most common household power configuration for new installations. Operation without at least a passive (50Hz/60Hz choke) PFC is absolutely prohibitive for 15 kW output power – the high-current spikes would otherwise require a line input with 1.84 * 15kW / 240V = 115 A (!) because of the harmonic content of the apparent/AC power for full-wave non-PFC rectification. This is odd, because this would require a separate power-factor correction circuit, e.g. * On one of the photos I see a huge electrolytic capacitor directly connected to the IGBT module. * In addition to Zero-Current-Switching, does the tank circuit also allow for Zero-Voltage-Switching for a wide range of controllable output power in continuous operation mode? * Does the control circuit avoid reverse-conduction of the IGBTs in order to do without anti-parallel silicon-carbide Schottky diodes? Maybe I have overlooked a link somewhere, but I am missing all the details about the power circuit (IGBT bridge and tank circuit) topology and parts dimensioning. Nice that Josh is sharing even the preliminary design! Posted in Slider, Tool Hacks Tagged induction heater, induction heating, induction heating metal, reactor forge, reactorforge Post navigation It uses a KFC chicken bucket as the concrete mold for the furnace chamber! But we love this old induction heater we covered a few years back. When the bar is cold, the induction heater draws about 1500 W - but once it starts to heat up, it draws more and more, topping out at a whopping 6500 W once heated up.Īs far as induction heaters go, this project looks pretty slick. The Reactor Forge has built runs off of a 220V circuit, and in the following demonstration, heats up a 6″ section of 1/2″ steel bar. ![]() Induction heating works by magnetically inducing current into the metal, where resistance turns the current into heat without physical contact. The kit hasn’t launched yet, but you can follow his progress on his GitHub. Fire is for cavemen! is working on a kit to bring induction heating to the masses - he calls it the Reactor Forge. Ever want to try your hand at black smithing? Building a forge is expensive and tricky - especially if you live in an apartment! But we’re all tech nerds here - it’s way cooler to use induction heating to heat up your metal for forging.
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