408 limitations

[Bubba]

Hi all!

I've been searching for days for information concerning the maximum punishment a Clyte 408 can take, but can't seem to find any consistent answers.

Does anyone, who has extensive experience with this motor, know what it can handle? I'm just looking for straight, simple answers concerning temperature and max watts and for how long. My daily commute is 9.5 miles each way, with a total climb of 300 feet over 5 miles. I've using 48v and currently have the max amps set to 32.00 (Lyen 12FET). Hitting 1570 watts for about 5 seconds on the steeper hills while pedaling. The highest temp I've recorded was 143 degF, on the hottest day we've had this year (94 degF ambient).

Thanks in advance!

Todd

Edit: 143 degF temp was the result of the average of several areas on the hub, using an IR sensor.

 

[Farfle]

someone on the forums whose name escapes me took a 406 up to a few KW with no ill results, as long as its the correct wind motor you should be fine with those amperage's, they are stout little motors. [edit] if the outside of the motor is that hot, there's a good chance that the windings could be much hotter, the rule of thumb max temp for the 5xxx series motors was about 140C (280F) IIRC . [edit]

 

[adrian_sm]

I have about 10,000+ kms (stopped counting now) on my 408 commuting to and from work.
About half of this at "48v" 30amps, the rest on 70v 25amps. No overheating issues, but I haven't exactly been pushing the boundaries.

I have had the sidecover fail resulting in the freehwheel and right hand bearing falling off.
I have also had one of the bearings seize. I only noticed when I pulled the motor apart for another reason.

Here's some data of the commute that makes up for 95% of my kms. Don't believe the spikes in the speed data, that is just dodgy GPS signal.



- Adrian

 

[spinningmagnets]

I believe Kepler and Ypedal have both run high voltage through a 408. Since they seem to appear to consider the 408 to be old-tech, the thread title may not draw them in. Perhaps PM them?

 

[dogman dan]

At that usage, just about any dd hubmotor is going to last you a loooooong time. I put a similarly wound and constructed motor through a lot worse, riding 1000 ft of vertical up to home every day at 100F ambient temps. Never saw much above 180F measured inside the hub, on a 15 mile full throttle ride home at 25 mph. Motor stil kicking, and looks like new inside. I put about 2000 miles on it riding to work daily, and then the next year started testing other motors.

 

[shawn_1976]

I am 300lbs. I run mine at 80V 40amps. I have done lots of hard riding, still works great and no problems

 

[Ypedal]

Yep, at 48v you wont hurt that motor.....

I run a 409 at 100v and 40 amps ( in a 20" wheel ) as my daily commuter, on hot days with spirited riding i've gotten my 409 well into the 60c (* 140f ) many times, and that is well within limits...

 

[Bubba]

Thanks to you all for the information!

It seems I have nothing to worry about... at least until I go for a lot more voltage. hehehe

Time to start pricing more batteries....