DC Motor Dynamometer

This is a small DC motor dynamometer I built at a past internship a few years ago. It consists of an adjustable mounting carriage for the motor, a bearingless torque and RPM transducer and a hysteresis brake. The motor is driven by a voltage follower circuit I designed and built which interfaces with LabVIEW via an analog DAQ module to do a voltage ramp 0-5vdc and then back down from 5vdc to 0vdc. Once the DC motor is at steady state operation, the hysteresis brake is driven by another voltage follower circuit controlled via LabVIEW and increases the brake voltage until the motor reaches stall torque. The torque and RPMs are measured by the blue transducer in the middle and information is sent to the same analog DAQ module. The whole process was automated and so that any technician could test DC motors and get performance curve data from them. The GUI was built in LabVIEW and outputs live data and logs data from each run into a .csv file.