InductionHeater: Difference between revisions
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Based on [http://local.roysmeding.nl/3kW_BOM.png | Based on [http://local.roysmeding.nl/3kW_BOM.png Smedings estimate] | ||
Obviously, some parts may die a gruesome death during construction and testing. Worst case estimate is that the switching transistor and the driver will die twice, adding an amount of €60 to the BOM before we have a working machine. | Obviously, some parts may die a gruesome death during construction and testing. Worst case estimate is that the switching transistor and the driver will die twice, adding an amount of €60 to the BOM before we have a working machine. | ||
Revision as of 11:23, 5 September 2014
| Project InductionHeater | |
|---|---|
| Status | Initializing |
| Contact | smeding, gori |
| Last Update | 2014-09-05 |
Idea is to make a 3kW induction spool to smelt metals and heat steel for forging. For examples see :
Inverter circuit
Smeding had designed a circuit and made a BOM, see below:
| Component | cost |
|---|---|
| Bridge rectifier | €2.56 |
| switching transistor | €22.92 |
| Tank capacitors | 20.50 |
| DC link filter capacitor | €23.14 |
| Gate driver | €7.06 |
| Couple transformer Toroid | €20 (est.) |
| Gate drive transormer toroid | €3 |
| Estimate for components killed (see below) | €60 |
| Total | €160 |
Based on Smedings estimate Obviously, some parts may die a gruesome death during construction and testing. Worst case estimate is that the switching transistor and the driver will die twice, adding an amount of €60 to the BOM before we have a working machine.
Additional hardware
In addition to the inverter circuit, at least the following things are needed to make a working induction heater
| Component | cost | Possible sources | requirements |
|---|---|---|---|
| Coil | € 15 ? | Gas tubing, car brake tubing | Copper. Sufficient copper area to handle the current. Sufficient inner area + diameter to allow for effective cooling |
| heat exchanger | €15 ? | Car junkyard | Unsure how much heat needs to be removed and at what temperatures. Worst Case would be 3 kW. A car radiator is probably good (cheap, sufficient power and an integrated fan) |
| Pump | € | Possibly a pump from a domestic heater (CV). | Have to check whether or not normal sizes create sufficient flow through small diameter coil tubing |
| Electrical connections and wiring | € | Battery connections form scrapped cars? | How much current do we expect, and how long do the wires have to be? how do we connect these to the coil tubing (Earth blocks? |
| ... | |||
| Total cost | € 30 (incomplete) |
Now we need financing. Initial estimate is that we need at least another 50% on top of the BOM to get the box, spiral, coolers etc. Goal is thus 150 -200 euro
Pledges: