Controlling a Resover with NI Motion

[wade75]

Hello,

         I have an application that requires the rotation of brushless servo motors.  However the motors have resolvers instead of encoders.  I was reading that NI Motion is not intended to work with resolvers.  I am wondering if there is a way around this so I can use these motors with NI Motion Controllers. 

Thanks... Wade

[Jochen]

Wade,

in most cases BLDC motors and their feedback signals are connected to a power drive, that does the commutation. Many of these 3rd party drives export an emulated quadrature encoder signal and they accept an external voltage as a torque or velocity command signal. This is a typical usecase where NI 73xx motion control boards act as postion control devices, while the lower level control loop is run by the drive.

There are many vendors on the market that provide drives with such features (e. g. Danaher (Servostar drives), SEW, Maxon,...).

Does this answer your question?

Kind regards,

Jochen Klier

National Instruments