I was in the process of converting a second Bafang Ultra bike from 48 volts to 72 volts with the Grin PR and CA3. I did one already at 60 volts and liked it so much, I bought all the items from Grin and a large capacity triangle battery.
When I went to remove all of the internal Bafang controller and such, I found this unit is different from my 1st one. It does not have hall sensor wiring! It has a little magnet on the end of the motor shaft and that spinning gives some signal to a board and that somehow simulates the 3 hall sensors. This cannot be used with the PR and CA 3.
So I tried doing the sensor-less auto tune and it does run the motor. It does so after some bang and pops. Not a smooth start up like my other unit with hall probes.
Can anyone tell me if this will give me a lot of problems? Should I just abandon this project and leave it at 48 volts with Bafang controller and 30 amps? Should I go ahead and install it in sensor-less mode without hall sensors? It seems like it would not be good unless I only had the motor start after pedaling.
Can I buy some hall effect sensors and install them into the windings?
Looking for advice......
When I went to remove all of the internal Bafang controller and such, I found this unit is different from my 1st one. It does not have hall sensor wiring! It has a little magnet on the end of the motor shaft and that spinning gives some signal to a board and that somehow simulates the 3 hall sensors. This cannot be used with the PR and CA 3.
So I tried doing the sensor-less auto tune and it does run the motor. It does so after some bang and pops. Not a smooth start up like my other unit with hall probes.
Can anyone tell me if this will give me a lot of problems? Should I just abandon this project and leave it at 48 volts with Bafang controller and 30 amps? Should I go ahead and install it in sensor-less mode without hall sensors? It seems like it would not be good unless I only had the motor start after pedaling.
Can I buy some hall effect sensors and install them into the windings?
Looking for advice......