Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DC MOTOR DRIVE CIRCUIT AND TAPE PRINTER COMPRISING THE SAME CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2003/007466
Kind Code:
A1
Abstract:
A DC motor drive circuit for stabilizing the rotation of the DC motor just after power supply and for preventing its reverse rotation just after a stop of power supply. As the circuits for supplying a power source voltage to a DC motor (6), an unstable voltage supply circuit (103) is disposed as well as a stable voltage supply circuit (104) that shares a transistor (TR1) with this circuit. The stable voltage supply circuit (104) is used at the beginning of the start−up of the DC motor (6), and the unstable voltage supply circuit (103) is switched on when the DC motor (6) reaches a constant speed.

Inventors:
UNOTORO HIROTSUGU (JP)
HOKAZONO TAKAMINE (JP)
SHIBATA YASUHIRO (JP)
SUGIURA YOSHIO (JP)
TANJIMA NAOKI (JP)
MUTO NARUHITO (JP)
Application Number:
PCT/JP2002/007119
Publication Date:
January 23, 2003
Filing Date:
July 12, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BROTHER IND LTD (JP)
UNOTORO HIROTSUGU (JP)
HOKAZONO TAKAMINE (JP)
SHIBATA YASUHIRO (JP)
SUGIURA YOSHIO (JP)
TANJIMA NAOKI (JP)
MUTO NARUHITO (JP)
International Classes:
H02P1/18; H02P3/08; (IPC1-7): H02P7/06
Foreign References:
JPS5334284B21978-09-20
JPH03113762A1991-05-15
JPS4417339B1
JPH05146193A1993-06-11
JPS63190586A1988-08-08
EP0943447A11999-09-22
Attorney, Agent or Firm:
Koizumi, Shin (37-4 Yushima 3-chom, Bunkyo-ku Tokyo, JP)
Download PDF: