Riding with the motor's temperature sensor connected was no fun. After 25 minutes, it cuts the power significantly.
We disconnected it, which helped at the risk of motor damage.
You are right of course regarding brushes replacement. However, it requires disassembling the swingarm and opening the motot. Doable, but I'd rather have a maintenance free brushless motor.
Waiting now for a replacement controller and will add a fan as you suggested.
Someone can correct me, but as far as I know it has 1.4kW DC motor
Watts = Amps x Volts
1400W / 48V = ~30A, but keep in mind electric motor can draw much higher amps under a load (accelerating). But... When accelerating, the peak Amps can be 55A, although I would guessed something around 45A. In the end the question is what is the average amperage it draws and what is the timeframe it draws 55.
I agree, however the stock Oset 24 is equipped with a 50 (continous) & 130 amp peak controller.
Also, a 250 amp fuse is installed on the main wire. So, I guess my 55 peak amp draw may be quite low compared to stock Osets, but not sure.
replaced the stock Oset 24r controller with a different model.
installed potentiometers on the throttle's +5v and ground wire, and tweaked them until I managed to tame the acceleration to my liking, and vanish the dead band of the throttle, when applying power.
measured the max amp draw at full throttle from stand still on a high traction surface (no wheel spin) - 55 amps. is this reasonable for this model? too low? too high?
yes supplying a voltage directly to the motor will/should run the motor, just be careful supplying the full 48v as it will make the motor jolt into action quite violently,, better to test will a lower voltage i.e. a 12v battery. When I have tested older oset controllers they work without a relay in the system but the controller on the 24 maybe different, I would check the throttle/connections as long as the motor works after testing also on the diagram there are 2 fuses and a diode it would be worth testing these items before going any further, but if still no joy then you may need to email oset and ask them what the possible cause can be..
Thanks.
Fuses checked fine.
Will keep you up to date regarding the other tests (waiting for a new throttle and relay).
Reading older posts with similar issues, they mention that a faulty motor will cause the controller to not fire up the relay.
My situation is that the controller do provide the 48v to tbe relay (via the 2 thin wires). So, I guess the controller is trying to switch on the relay by sensing a fine motor load. Rulling out motor problem (or not 😉)
if the motor is open circuit, will the controller still send the initiation voltage to the relay? because the controller still output the correct 48v voltage to the relay.
the motor was fine when riding back home, I don't see a reason for it to malfunction sitting idle. but who knows..
perhaps the spark caused by attaching the connector when the two fat red wires were connected caused a controller problem...
anyway, I suppose I can check the motor by providing its wires with a direct 48v power source.
Ways to cool down motor and controller
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Iceland, here I come..