japperrrr
1 mW
Previous topic: https://endless-sphere.com/forums/viewtopic.php?f=10&t=72781
Cause: water damage
Solution: let it dry and clean it up
System specs:
- 48V 40Ah Winston LiFeYPO4 (16c)
- 24 FET 6 phase sensored controller
- IRFB4310 mosfets
- Two CY8C24533-24PVXI IC's
- Top speed 55 kmh / 35 mph
- Range 55-80 km
And there I am again, two months later. Last week when I was driving to the university, the motor suddenly started making a lot of noise. I also lost all my torque so I had to push my scooter for the last 100 meter (lucky me) to get it to one of the university's workshops.
After doing some checks I found out that I was able to drive on either one of the two "groups" consisting of 3 phases (50% torque), but not on both of these two groups at the same time (6 phases). Also, there was no moisture inside the controller, so my solution to the previous problem worked out well.
Basically, I assume that both groups are OK because otherwise I also wouldn't be able to drive on just 1 of these two groups.
Then, the problem must be that somehow these two 3-phase controllers got out of sync. Which is strange, because they both use their own hall sensors.
First I cleaned the controller using contact spray and ethanol to remove any dust and dirt, but this had no effect.
Secondly, measured the position of the hall sensors in the motor and confirmed that they are working properly.
As expected, it looks like this:
At this point I don't really know what else I could look for. It looks like one of the groups is a bit delayed compared to the other group, but I pretty much excluded this possibility by checking the position of the hall sensors and testing with only 3 phases connected. Still, something odd happens when I connect all 6 phases and for the past few days it really has been driving me crazy :lol:
Does anyone here have an idea of what could be causing this kind of trouble?
Cause: water damage
Solution: let it dry and clean it up
System specs:
- 48V 40Ah Winston LiFeYPO4 (16c)
- 24 FET 6 phase sensored controller
- IRFB4310 mosfets
- Two CY8C24533-24PVXI IC's
- Top speed 55 kmh / 35 mph
- Range 55-80 km
And there I am again, two months later. Last week when I was driving to the university, the motor suddenly started making a lot of noise. I also lost all my torque so I had to push my scooter for the last 100 meter (lucky me) to get it to one of the university's workshops.
After doing some checks I found out that I was able to drive on either one of the two "groups" consisting of 3 phases (50% torque), but not on both of these two groups at the same time (6 phases). Also, there was no moisture inside the controller, so my solution to the previous problem worked out well.
Basically, I assume that both groups are OK because otherwise I also wouldn't be able to drive on just 1 of these two groups.
Then, the problem must be that somehow these two 3-phase controllers got out of sync. Which is strange, because they both use their own hall sensors.
First I cleaned the controller using contact spray and ethanol to remove any dust and dirt, but this had no effect.
Secondly, measured the position of the hall sensors in the motor and confirmed that they are working properly.
As expected, it looks like this:
At this point I don't really know what else I could look for. It looks like one of the groups is a bit delayed compared to the other group, but I pretty much excluded this possibility by checking the position of the hall sensors and testing with only 3 phases connected. Still, something odd happens when I connect all 6 phases and for the past few days it really has been driving me crazy :lol:
Does anyone here have an idea of what could be causing this kind of trouble?
