| 摘要 |
<P>PROBLEM TO BE SOLVED: To drive and control a motor with high accuracy by identifying an induction voltage coefficient of a permanent magnet synchronous motor accurately regardless of the size of a load torque. <P>SOLUTION: A control device includes a current detector 4 which detects a current value to an inverter 2, a power estimator 9 which estimates a power value to be supplied to the motor 1 by using the current value detected by the current detector 4, a current estimator 11 which estimates a d-shaft current value and a q-shaft current value of the motor 1 by using the current value detected by the current detector 4, a Ke identification calculator 12b which identifies the induction voltage coefficient of the motor 1 by assigning the power value estimated by the power estimator 9 and the d-shaft current value and the q-shaft current value estimated by the current estimator 11 to a predetermined equation when each of a plurality of speed commands showing different speeds is output each, and an output voltage command calculator 15 which calculates the voltage of each phase to be added from the inverter 2 to the motor 1 by using the induction voltage coefficient identified by the Ke identification calculator 12b. <P>COPYRIGHT: (C)2010,JPO&INPIT |
