Motor Parameter Measurement
by Dennis L Feucht
Q: Motor specifications often give parameters called the voltage constant, KV, and torque constant, KT. How do these parameters relate to a motor circuit model and how can they be measured?
A: These parameters usually appear in step-motor and other permanent-magnet synchronous (PMS) motor data. Step-motors of the industrial size (NEMA 17, 23, 34, and 42, which are the cross-sectional dimensions in deci-inches -- divide by 10 to get the inches per side of the motor) are a hybrid of variable-reluctance (VR) and PMS motors, but the PMS dominates and they can be applied as PMS motors.
...download complete article here (97 KB PDF)
|
