Title:
ACTUATOR DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/254929
Kind Code:
A1
Abstract:
An actuator element (10) moves a movable element (1) by means of the magnetic force generated by current flowing through a coil (2). A current detector (11) measures a first current waveform signal that indicates the temporal change in the current flowing through the coil (2). A storage device (12) stores in advance a second current waveform signal that indicates the temporal change in the current flowing through the coil (2) when the actuator element (10) is operating normally. A comparison circuit (13) calculates the difference between the first and the second current waveform signal. When the absolute value of the difference between the first and the second current waveform signal exceeds a threshold value, a control circuit (14) outputs a control signal that indicates the actuator element (1) is not operating normally.
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Inventors:
UEUCHI MASAYUKI (JP)
YAMAMOTO MICHIHIRO (JP)
YAMAMOTO MICHIHIRO (JP)
Application Number:
PCT/JP2022/015629
Publication Date:
December 08, 2022
Filing Date:
March 29, 2022
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
H01F7/18; H02P29/024
Foreign References:
| JP3166788U | 2011-03-24 | |||
| JPH07194175A | 1995-07-28 | |||
| US20200072892A1 | 2020-03-05 | |||
| JP6368007B1 | 2018-08-01 | |||
| JP2009089072A | 2009-04-23 | |||
| US20140129159A1 | 2014-05-08 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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