Title:
DRIVE CIRCUIT OF DC MOTOR AND TAPE WRITER
Document Type and Number:
Japanese Patent JP2003033080
Kind Code:
A
Abstract:
To prevent a DC motor from rotating reversely after stoppage.
The DC motor rotates at a constant r.p.m. when an MT1 signal is turned on until time t0. From the time t0 to time t4 when an MT2 signal is turned on to restart rotation of the DC motor, the MT1 signal is turned on/off repeatedly through chopping control. Duty ratio of the MT1 signal is determined such that the DC motor does not rotate forward nor reversely.
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Inventors:
SHIBATA YASUHIRO
SUGIURA YOSHIO
UTORO HIROTSUGU
MUTO SHIGETO
TANTO NAOKI
SOTOZONO TAKAMINE
SUGIURA YOSHIO
UTORO HIROTSUGU
MUTO SHIGETO
TANTO NAOKI
SOTOZONO TAKAMINE
Application Number:
JP2001211790A
Publication Date:
January 31, 2003
Filing Date:
July 12, 2001
Export Citation:
Assignee:
BROTHER IND LTD
International Classes:
B41J19/30; H02P7/06; H02P7/285; (IPC1-7): H02P7/06; B41J19/30; H02P7/285
Attorney, Agent or Firm:
Yoshiyuki Kaji (2 others)