Lebowski wrote:The plan is to add high torque startup or even high torque at standstill, SENSORLESS.
I did some measurement on the ME 602 scooter motor and found the winding
impedances change by + or - 15 % based on the rotor position, power needs
to be supplied to the lowest inductance (of the 3) to make the motor move.
This does work quite well for me, the lowest phase inductance of the 6 (polarity counts) will give you the rotor position +/-30 degree error, you then just need to energize 90 degree ahead in your chosen direction and repeat until your fast enough to pick up the BEMF...
See here for my result: viewtopic.php?f=30&t=36479&start=15#p534016