Hi All,
I want to connect 2 identical brushless DC linear motors in parallel and control them using 1 controller. The signals paralled are U, V, W phases. Both have hall sensors but I am assuming if I connect these signals in parallel too, the setup will not work with phase mismatch and they will give me commutation errors. Hence, I am connecting the hall sensors signals ( sin/cos) of 1 motor to the controller and leaving the other set unconnected. Worth noting here that the 2 motors are placed parallel to each other and their sliders are connected mechanically to a common sq plate/platform. The plate/platform moves up and down as the motors move. Initially with just 1 motor attached to one side of the motor the platform became wobbly and hence it was decided to use 2 motors on either side of the platform.
Will this new arrangment with 2 motors in parallel work? The 2nd motor whose hall sensors are not connected will have no idea where it is, so will it fight the other motor and eventually draw more current and fail to cause any movement and lose commutation?
TIA

 

The second motor should work as a blind slave and follow the master motor without problems unless one is overloaded and stalls.

 

I am a little confused as to what commutation you have exactly, 3 hall effect sensors are generally for BLDC not sin/cos which usually refer to AC synchronous.
If one has no commutation, how is it supposed to operate?
Max.

 

You are right Max. It cannot be Hall sensors as they have S1,2,3 signals and not sin/cos. The documentation called it" sensor" and not encoder. But either ways the documentation claims the "sensors" are used to as monitor and measure position.
Thanks TCM. I will try it and let you know if the setup fails or not.