| 摘要 |
<P>PROBLEM TO BE SOLVED: To speedily perform acceleration and to perform speed control after the acceleration with high precision. <P>SOLUTION: In the beginning of driving of a motor, a voltage command value U=V1 corresponding to an upper-limit voltage value V1 is input to a motor driver to drive the motor with maximum capacity. When a rotating speed ω of the motor reaches a threshold speed ωch, the voltage command U input to the motor driver gradually decreases from the value V1. Then when the voltage command value U reaches a voltage command value Uconv defining timing of switching to preset feedback control, motor control is switched to feedback control. Then the voltage command value Uconv is set to a value Uconv<SP POS="POST">*</SP>-Ke<SP POS="POST">*</SP>ωc+Ke ωc based upon a standard voltage command value Uconv<SP POS="POST">*</SP>, a counter electromotive force constant Ke<SP POS="POST">*</SP>that the voltage command value Uconv<SP POS="POST">*</SP>is based on as a premise, a target speed ωc at the start of the feedback control, and a counter electromotive force constant Ke specified according to an operation mode of the motor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
