| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device of an elevator, obtaining a coefficient of correction of a current conversion gain without fine adjustment of voltage in the case where there is a difference in resistance value between alternating current motor coils or in the case where there is an error between a voltage command and output voltage of an inverter. <P>SOLUTION: This control device of an elevator includes: a speed control device; a current control device 17 for giving a voltage command according to a command value, a speed feedback signal and a current feedback signal; an inverter 4 for driving an AC motor according to a voltage command; a current detector 10 for feedbacking an electric current flowing through the motor; a correction computing device 21 for multiplying the output of the current detector by a coefficient of correction to correct a detection value; and a current sensor gain coefficient calculating device 22 for calculating a coefficient of correction, wherein a car and a balancing weight are elevated. A control electric angular phase of the inverter is fixed to a designated value, and a predetermined torque current command is given to let a predetermined DC current flow between the two phases of the motor, and a coefficient of correction is calculated by the current sensor gain coefficient calculating device. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
