ST BLDC motor control STM3240G-EVAL

Posted on May 05, 2014 at 11:05

Ciao Dominik

sorry for the delay, I was fully involved in the development of the new lib. version.

If it can help I can try to answer now to your request.

• I'm wondering why I don't need the HALL sensor signals to detect the correct angle of the motor.

You have both sensors in the motor Hall and Encoder. Each one is able to measure the angle of the motor so you have to chose which one you want to use for your cantrol. As you did you select the Encoder in Drive management->Speed Position Feedback Management so the FOC is performed using the information coming from the Encoder and the informations comiong from the HALL sensors are skipped.

• My problem is now, that I have not a sine current on the motor phases and i can't change the speed of the motor...

It seems that your setup is not done correctly. You setup as speed and position sensor the Encoder so forget abot the captures of Hall sensors...

The implemented FW that manages the Encored is not supporting the Z input but just the two quadarture inputs A and B, more over the alignment procedure is mandatory. So you have to push the encoder alignment button in the LCD or in the WB before to run the motor.

Another test you can do is to enable the DAC and plot the measured angle in other to understand if it is decoded correctly. You can also set the control in sensorless or in open loop and use the Encoder (or the Hall sensor) as Auxiliary sensor and take a look at the measured angle.

Ciao

Gigi