ESTIMATION DEVICE OF INDUCTION MOTOR PARAMETERS, ESTIMATION METHOD, INVERTER SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a technique for facilitating acquisition of desired control performance in the inverter.;SOLUTION: An estimation device 6 including a data recording part 4 and a parameter estimation part 5 estimates each estimate of induction motor parameters, i.e., the primary resistance R_s, secondary resistance R_r, the leakage inductance L_σ, and the exciting inductance L_M. The data recording part 4 records N (N is a natural number) data of d-axis, q-axis current detection signals, d-axis, q-axis voltage command signals v^*_d,v^*_q, electric angle velocity ω_r, and the frequency command signal ω_e, in a motor 3 subjected to drive control by the inverter 2, during drive control of the motor 3, at a prescribed sampling time. The parameter estimation part 5 derives each estimate of the induction motor parameters, on the basis of a discretization model of the motor 3 by N data, and feeds back each estimate to the torque control section 23 or the current control section 27 of the inverter.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT