| 摘要 |
<p>A motor drive power converter (1a) of a numerical control system has an input current judging means (12) which compares the value of an input current measured by an input current measuring means (11) with an allowable current and an acceleration/deceleration command change signal output means (13) for outputting a control signal to drive units (2a, 3a) according to the result of the judgment by the input current judging means (12). If the input current judging means judges (12) that the input current Ii > the allowable current I0, the acceleration/deceleration command generating means (15a and 15b) of drive units (2a, 3a) changes an acceleration/deceleration command (reduces the inclination of a speed command) to reduce the input current Ii.</p> |
