| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller 1 for inverter which continues the stable operation of a motor by avoiding a motor stopping frequently under the bad environment of power conditions. <P>SOLUTION: This controller is equipped with: a revolution commanding means 108 which sets the goal of the revolution of a motor by the operation command from outside, a power state judging means 109 which judges the supply state of an AC power source, and a revolution deciding means 110 which limits the revolution of the motor 104 prior to the revolution setting of the revolution commanding means 108, based on the judgement of the power state judging means 109. It continues the stable operation of the motor, avoiding the operation of the motor 104 stopping frequently when the power supply ability of the AC power source is unstable, by judging the supply state of the AC power source 101 by means of the power state judging means 109, and by limiting the upper limit of the revolution to the target revolution by the revolution commanding means 108. <P>COPYRIGHT: (C)2007,JPO&INPIT |
