| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress an instable phenomenon of a motor that can be caused by transient voltage saturation. <P>SOLUTION: A controller of an AC motor includes: a position controller for generating a speed command; a speed controller for generating a current command; a current controller for generating a voltage command; a di/dt limiter part for calculating a q-axis voltage saturation amount ΔV<SB POS="POST">q</SB>equivalent to a transient voltage component of a q-axis voltage equation; and a saturation amount F/B part 105 for generating a position command correction amount ΔP using the q-axis voltage saturation amount ΔV<SB POS="POST">q</SB>. Also, the saturation amount F/B part 105 includes: an LPF 121 for making the q-axis voltage saturation amount ΔV<SB POS="POST">q</SB>pass through and feeding back a conversion value of the output to an input side of the position controller as the position command correction amount ΔP; and a band setting device 122 for setting a value equivalent to a reciprocal of an electric circuit time constant of the motor to the LPF 121 as a filter constant ω for determining a band of the LPF 121. <P>COPYRIGHT: (C)2013,JPO&INPIT |
