| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving method of a linear actuator capable of detecting abnormality at an early stage. <P>SOLUTION: An amplitude controller 40 detects an amplitude of a movable element 12 that is caused to reciprocate with respect to a stator 11, further detects temporal variations of a load corresponding to a temporal change of the amplitude having been detected and furthermore detects abnormality from the temporal variations. In addition, the amplitude controller 40 outputs the amplitude having been detected to a control output section 50. The control output section 50 controls a driving current Id for causing the movable element 12 to reciprocate based on amplitude information from the control output section 50. <P>COPYRIGHT: (C)2012,JPO&INPIT |
