newbie only got 30 k's out of brand new hub motor

[Jeremy Harris]

Glad you got it fixed. It should last for a fair while if it's well installed and doesn't get too hot.

Good luck with it, although you may find it's a bit addictive building ebikes............

Jeremy

 

[dmould66]

Glad you got it fixed. It should last for a fair while if it's well installed and doesn't get too hot.

Good luck with it, although you may find it's a bit addictive building ebikes............

Jeremy

your right about it being addictive-ive just bought another one!

ive installed it as well as i can now, cut off most of the dodgy connectors and soldered the joints, moved the controller into the air flow (but it is hot here, is there anything else i can do to keep it cool or generally make it last?

 

[Lessss]

A fan.

 

[amberwolf]

If water/rain isn't a problem, or metallic road debris, etc, you could do what I did with mine, and take the end covers off to let air flow thru them. I just blow them out with compressed air now and then, to keep the flinty Phoenix dust from building up. But when it gets rainy I have to put the covers back on and/or seal them shut with duct-tape.

A fan will do the same thing without removing the covers entirely, and probably do it better, but it'll also suck dust/etc into the controller, so be prepared to blow it back out with nice dry air periodically.

 

[dmould66]

so if i fit a fan do i just direct air over the outer case or do i need to direct it through the internals?
been running around on it on and of all day-this is fun!
want to take it back out on the highway again for the same 30 km run that blew it last time-was i just unlucky or do you think i should sort cooling first?

 

[Jeremy Harris]

so if i fit a fan do i just direct air over the outer case or do i need to direct it through the internals?
been running around on it on and of all day-this is fun!
want to take it back out on the highway again for the same 30 km run that blew it last time-was i just unlucky or do you think i should sort cooling first?

If the case of the controller isn't getting too warm then it should be OK. If you've now got it mounted so it's in the open it should be easy enough to just put your hand on it and feel if it's getting too hot. The FETs fail before the case gets really hot, so if it gets to the point where it's uncomfortable to put your hand on it's too hot. If this happens just stop for a while and let it cool down, or switch to pedalling for a while.

Jeremy

 

[dmould66]

just got back from the same 30k run that blew the original controller, was even riding into a strong headwind on the way out this time and it survived-didnt even get luke warm. the final stretch is up a long uphill drag, deliberately didnt pedal checked the temp at the top-nothing. so ever moving it out into the wind or improving the connections did the job-thanks to all. one more stupid question- could i run two hub motors of one throttle? would it be as simple as splicing the throttle into two identical controllers running two identical motors? i hope so!

 

[Jeremy Harris]

Yes, you can run two controllers from the same throttle. It's not quite as easy as splicing the two together, but almost.

The throttle will have three wires (assuming you don't have one with fancy lights). One is a +5V power feed, one is the throttle voltage output and the other is the ground connection. You need to splice the ground connection and the throttle voltage output to the second controller, but leave the +5V feed just connected to one controller.

Wire colours vary, but typically +5 will be red, ground will be black and the throttle voltage output will be either green or blue.

If you do this you need to remember that both controllers will have a common ground connection, not that it causes a particular problem other than with some odd-ball charging setups.

Jeremy