Title:
MOTOR DRIVE
Document Type and Number:
Japanese Patent JPH0530642
Kind Code:
A
Abstract:
PURPOSE: To interrupt DC power supply for a motor driving circuit quickly upon occurrence of abnormality.
CONSTITUTION: A rotation detector 20 detects rotation of a brushless motor 1. When the rotation detector 20 does not detect a rotation signal even if a start signal for the brushless motor 1 is outputted, an abnormality detecting circuit 31 outputs the starting signal repeatedly several times and when the rotation signal is not detected yet, an overcurrent is fed through a current fuse 25 disposed between a driving circuit 8 and a DC power supply 17 thus blowing out the fuse forcibly.
Inventors:
SATO KOZO
Application Number:
JP18139591A
Publication Date:
February 05, 1993
Filing Date:
July 23, 1991
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G02B26/12; G02B26/10; H02H3/08; H02H5/04; H02H7/093; H02P6/12; (IPC1-7): G02B26/10; H02H5/04; H02H7/093; H02P6/02
Attorney, Agent or Firm:
Tsuyoshi Sato (1 person outside)
Next Patent: JPH0530643