Submerged motor, now malfunctioning!
After having to wait through a heavy, but not unusually heavy, thunderstorm, I was riding home from work when, topping a rise suddenly found myself facing a flooded dip in the road - going too fast to stop. It has never flooded like this before. I was left with no choice but to power through the 2 to 2.5 feet of muddy water hoping to get out the other side before something got ruined.
No such luck. The motor now will not start turning until given an initial spin, thereafter it runs roughly and noisily, at slow speed, getting smoother (nearly normally) at top RPMs. I rode it slowly home (about 5 miles) in this condition - maybe not a good idea.
I dried the wiring connectors and checked for evidence of water intrusion into the controller. It does not look like water got in the controller.
The only fully submerged item was the motor, so my best guess is bad hall sensors - maybe just temporarily until they dry out?
Matt, I recall that you once disassembled an e-max motor? Any tips?
Thanks for any advice.
sounds like a hall sensor failure (or if you are really lucky, just an external shorted hall sensor)
when i last had this problem, i replaced the original hall sensors with those from another (mechanically) broken motor.
I was not able to identify the original part number.
When i go back to the factory tomorrow, i will ask if they know what specific hall sensor was used in the motors for the emax sport.
i remember also seeing a motor among old-new stock for the emax sport.
ill ask for a price aswell.
Not sure it's any help but I think the Hall sensors we use are: Honeywell’s SS41 and Infineon’s TLE4945L. I'll check with Erik on what was involved in replacing them - I don't recall it being too terrible.
when i was dis-assembling my motor, i used a shop press to push the motor apart.
that's how my local EV workshop pushes apart all permanent magnet motors.