Title:
DRIVER DEVICE FOR STEPPING MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/193364
Kind Code:
A1
Abstract:
This driver device rotates a rotor by supplying the output current to each coil of a stepping motor. When the polarity and magnitude of the output current to each coil is controlled so as to maintain target polarity and magnitude after the polarity and magnitude of the output current to each coil has reached the target polarity and magnitude, the presence or absence of the occurrence of a specific current waveform in the output current is detected on the basis of back electromotive force associated with rotor rotation and a predetermined detection signal is transmitted to an external device when the specific current waveform is detected.
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Inventors:
MIYAGI RYOTA (JP)
HASHIMOTO HIROKI (JP)
HASHIMOTO HIROKI (JP)
Application Number:
PCT/JP2021/011140
Publication Date:
September 30, 2021
Filing Date:
March 18, 2021
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H02P8/12
Domestic Patent References:
| WO2018221628A1 | 2018-12-06 |
Foreign References:
| JP2016208727A | 2016-12-08 | |||
| JP2008022639A | 2008-01-31 | |||
| JP2009207246A | 2009-09-10 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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