looking at hi-powercycles sale on bmc geared motors .i am thinking about buying the v-3 motor for 349.00.not sure about which controller to purchase?have heard conflicting reports about hi-power and bmc and would appreciate all opinions.good buy or not.will be installing in my surly big dummy as i bent the rim of my bl-36 in a crash last fall.also like idea of rear motor as it is more stealth as the police in minnesota are e-bike unfriendly.sale ends friday so all thoughts and opinions greatly appreciated.thanks to all.
hi-powercycles
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20amp would work but you need a special infineon controller with the BMC / MAC geared hub motors.
So you need to get one from the vendor that's selling you the BMC / MAC motor.
But i recommend 25 amps. 20 is pretty weak.
So you need to get one from the vendor that's selling you the BMC / MAC motor.
But i recommend 25 amps. 20 is pretty weak.
Philistine
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I run a BMC V3 on one my spare bike. When I bought it I was told that you should only use BMC controllers. But I blew up my BMC controller, and now I run a Lyen 12 Fet. http://www.endless-sphere.com/forums/viewtopic.php?f=31&t=17683&hilit=extreme+modder
Works like a charm, and that way I can program the controller as I like.
But as I said, I personally like having my Lyen 12 Fet, with a Cycle Analyst direct plug in attached, that way you can even limit your amps on the fly.
I agree with what Neptronix says about watching your amps, they are notorously easy to cook. But if you get the hub from Hi Power cycles I think they upgrade the phase wires for you is that right?
Anyway, I have been running both 36v and 48V on my BMC V3 @ 40amps for over 6 months without issue (I blew up my BMC controller because I plugged it in reverse polarity one day). I just stripped down my hub the other day and the gears are fine. Having said that, my BMC is my spare ebike, and I have probably only put maybe 300km on it total, and when I do it is basically as a spare commuter. My phase wires do get hot at that current, and I can see why people say it might get too hot on a really long hill, but as I said, have been running 40amps without issue so far.
Best of luck.
Works like a charm, and that way I can program the controller as I like.
But as I said, I personally like having my Lyen 12 Fet, with a Cycle Analyst direct plug in attached, that way you can even limit your amps on the fly.
I agree with what Neptronix says about watching your amps, they are notorously easy to cook. But if you get the hub from Hi Power cycles I think they upgrade the phase wires for you is that right?
Anyway, I have been running both 36v and 48V on my BMC V3 @ 40amps for over 6 months without issue (I blew up my BMC controller because I plugged it in reverse polarity one day). I just stripped down my hub the other day and the gears are fine. Having said that, my BMC is my spare ebike, and I have probably only put maybe 300km on it total, and when I do it is basically as a spare commuter. My phase wires do get hot at that current, and I can see why people say it might get too hot on a really long hill, but as I said, have been running 40amps without issue so far.
Best of luck.
