openinverter forum

Hi Guys,

I got my motor to turn but it is turning very slowly. fstat (my guess it this is the freq send to the stator) seems to stay below 5 almost as if limited even if I turn my pot to max.
I looked at BMS input (connected to gnd), Error input (Pin 13) is 5V and UVLO input (Pin 14) is 3.3V. What am I doing wrong? Which parameters should I change to send higher frequency to the stator?

The symptom of the motor turning slowly is almost certainly caused by a missing or inverted encoder signal. The encoder output consists of two channels : A and B. The signal from these is used by the microcontroller to determine the speed and direction of rotation of the motor. If for example the A and B signals are swapped then the inverter will be trying to drive the motor in one direction and the encoder signal will tell it the motor is running backwards hence this behaviour. If either or both signals are missing then the microcontroller has no speed or direction information and the same symptoms result.

Hi Jack,

Thank you for the reply. My speed encoder is set to AB and is reading the speed just fine. Any suggestions on how I could play around with these or other parameters to get more speed / higher freq to the motor?

Did you try to swap A and B?

Hi guys,

I swapped A and B and now it works! Whoop Whoop! Thx for the help!