| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently recover discharge current of an actuator without affecting an actuator drive voltage waveform, and to reuse the discharge current as effective power to thereby reduce power consumption. <P>SOLUTION: A discharge energy recovery device is provided for recovering discharge energy discharged from a piezoelectric element when the piezoelectric element is driven. The discharge energy recovery device includes: a drive voltage generator to generate a voltage to drive the piezoelectric element; a discharge voltage monitoring unit to monitor a discharge voltage discharged from the piezoelectric element when the piezoelectric element is driven by the drive voltage generator; a plurality of charge accumulating devices to accumulate a charge corresponding to a voltage monitored by the discharged voltage discharge voltage monitoring unit; and a selection unit to select one or more charge accumulating devices from the plurality of charge accumulating devices having capacity sufficient to enable accumulation of the charge corresponding to the voltage monitored by the discharge voltage monitoring unit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
