New 600W YASKAWA AC Servo Motor 200V 4.3A SGMAS-06A2A2C Industrial Servo Motor

MEASURING MOTOR PARAMETERS 
These are the motor parameters that are needed:
Motor voltage constant Ke (volts-sec/rad)
Motor torque constant KT (lb-inp)
Motor resistance Ra (ohms)
Motor inductance La (Henries)
Motor inertia Jm (lb-in-sec^2)
Load inertia reflected to the motor armature shaft Jload (lb-in-sec^2)
Total inertia=Jm+Jload Jtotal(lb-in-sec^2)
Note that the above values are stated for a single winding with dc motors, and are the
phase values for a BLDC motor. Brushless dc motors (BLDC) are 3 phase synchronous
motors used in a configuration to be treated as dc drives.
MOTOR RESISTANCE
For the winding resistance use an ohmmeter. For a dc motor measure the resistance between the 2 armature wires. If it is a WYE connected BLDC motor, the resistance is the line-to-line resistance. Thus divide the resistance(l-l) by 2 to get the phase resistance.
MOTOR VOLTAGE CONSTANT Ke
To measure the Ke of the motor, put the motor shaft in a lathe and rotate the shaft at some speed [rpm] such as 1000rpm. With a dc motor, use a dc voltmeter to measure thearmature voltage. The Ke is then the voltage you read divided by the speed in radc.

 

 

With a BLDC motor use an ac voltmeter to measure the voltage between any 2 wires of the 3 motor wires and then convert the line-to-line voltage to the phase voltage value by dividing the line-to-line voltage by 3 =1.73.