| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a motor control unit having protection functions capable of avoiding alarm stop with simple configurations. <P>SOLUTION: The motor control unit includes a minor loop including a torque control section for controlling current supplied to a motor for driving various kinds of machines. The motor control unit observes or estimates an effective load rate or a physical quantity for temperature of at least one of the motor control unit, the motor, and the machine. When determining that there is a high possibility of an overload, the motor control unit performs an overload avoidance operation for changing control responsiveness of a control system existing in an input-side path of the torque control section to reduce the effective load rate. <P>COPYRIGHT: (C)2011,JPO&INPIT |
