抄録
It is well known that various performance characteristics of a 2-phase servomotor can be investigated by using its equivalent circuit parameters.
In this paper, a method to determine the equivalent circuit parameters (r1, xm, r2, x1) of 2-phase servomotor is described.
In this method, (1) r1 is determined by measuring the d-c resistance of the reference windings, (2) xm, r2 are determined by measuring both the maximum braking torque [Tod]max and the revolving velocity correspond to [Tod]max, on the d-c braking torque characteristics of 2-phase servomotor, (3) x1 is determined by measuring the applied voltage, input current and the tuning current of the reference windings at zero speed.
To check the accuracy of this proposed method, the average torque and the alternating torque characteristics of the sampled 2-phase servomotor are calculated by using the equivalent circuit parameters which is determined by means of this method, and these calculated results are compared with the experimental ones.
The agreement is satisfactory, and this method was found useful.
