| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller of industrial machine driven by a servo-motor capable of checking a maximal voltage and current controllable by an inverter, operating the machine in high efficiency, and more highly improving the operation capability of the machine. <P>SOLUTION: The controller of the industrial machine has an AC motor 1, an inverter 14 for driving the AC motor 1, an electric-energy storage unit 13 to secure energy on operating the machine driven by the AC motor 1, and a controlling unit for controlling the AC motor 1. The controller controls a DC voltage at the side of a DC current in the inverter 14, a torque command or a signal equivalent to the torque command of the AC motor 1, and a reactive current in the current driving the AC motor 1 to zero or a negative level in accordance with its rotational speed of the AC motor 1. <P>COPYRIGHT: (C)2009,JPO&INPIT |
