binlagin wrote:Yeah, I'd defintly listen to what Zombiess has to say about this.
I ended up destorying a FET when running 60amp battery and 120 phase amps with a stock 18-FET Lyen controller. I'm seeing alot of people doing this with their un-modified smaller controllers... but it's only a mater of time until they go POOF!
I'm going to be preforming the mosfet tie together MOD that Zombies has documented on a rainy day in the coming weeks. I just have to decided if I'm going to switch to the Mica insulator. I also plan on adding some form of ventilation
hjns wrote:Anybody thought of oil cooling of a controller?
Lebowski wrote:Yes actually.
hjns wrote:Lebowski wrote:Yes actually.
Did you try it?
Lebowski wrote:No. But I would get a slid aluminium bar, dril a hole lengthwise for the oil to flow through and screw the FETs to this.
But 6 4110's at 80V and 70A battery (100A phase, about 10W of dissipation per FET) would give
you a 5.6 kW controller. You don't need a huge amount of FETs for this power level.
hjns wrote:I have been thinking about these IRFB 4228 MOSFETs:
almost the same specs as the 4115, but higher peak current capability (170A instead of 104A), similar resistance (12mOhm vs 11mOhm), and similar form factor (TO-220). Would these take more high current abuse?
ZOMGVTEK wrote:I did some destructive testing on IRFB4110PBF's and they take >120A for quite a while. I didn't have enough heat sink to run it for hours at 120A, but it will probably take it. I didn't have enough supply at the time to run past 145A or so, but I couldn't get the bond wires to melt. Obviously, being that this is a single FET, its going to share current quite well. Thats where the 1/3 loss factors in for more than one FET. I feel comfortable saying that IRFB4110PBF's can sustain the 100A or so I claim.
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