MOTOR CONNECTION DETECTION DEVICE AND METHOD, MOTOR DRIVE SYSTEM, IMAGE FORMING APPARATUS APPLIED THEREWITH, AND CARRIER DEVICE

Japanese Patent JP2017156246

A

PROBLEM TO BE SOLVED: To provide a motor connection detection device capable of precisely detecting connection abnormality such as connector disconnection, wire breaking of a harness and motor winding targeting a bipolar type stepping motor.SOLUTION: A motor connection detection device consists of: a driver 501 controlling a current to be supplied to a motor 502; and a control part 500 which consists, as connection constitution between the motor 502 and the driver 501, a circuit of resistances 503, 504 and a smoothing capacitor 505 inserted between motor winding and ground corresponding to output terminals OUT1B, OUT2B of the driver 501 and a circuit of resistances 506, 507 and a smoothing capacitor 508, and has voltage detecting means of detecting a voltage generated with a regenerative current in a motor ON state in which a current flows to the motor 502 and determination means of determining connection abnormality of the motor 502 on the basis of the detected voltage, the determination means determining the connection abnormality of the motor 502 on the basis of a voltage generated in a first decay period associated with a current attenuation system for the regenerative current.SELECTED DRAWING: Figure 1

OKAMURA HISASHI
KONDO TOMOHIDE
FUJITA HAYATO

JP2016040407A

September 07, 2017

March 02, 2016

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RICOH CO LTD

G01R31/02; H02H3/00; H02P8/36

JPH04261396A	1992-09-17
JP2002204593A	2002-07-19
JP2015192538A	2015-11-02
JP2008182644A	2008-08-07
JPS61154499A	1986-07-14

US20080143340A1

2008-06-19

Takashi Satoru

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