Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MOTOR CONTROL CIRCUIT AND CAR NAVIGATION SYSTEM
Document Type and Number:
Japanese Patent JP2009060737
Kind Code:
A
Abstract:

To provide a technology for correctly determining whether a motor-driven structure stopped normally or collided against an obstacle, and isolating the structure from the obstacle when the structure collided against the obstacle.

An obstacle detection section 22 detects the load state of a motor drive section 3 by detecting the rising of a motor current value. A target position setting section 23 measures the drive range of the motor drive section 3 by measuring the number of FG pulses. The obstacle detection section 22 may detect the rising of a motor current value in the next time from start of motor drive although the drive range measured at the target position setting section 23 does not reach the drive range set by the user. In this case, a motor control circuit 2 determines that the motor drive section 3 collided against an obstacle and can isolate the motor drive section 3 to a place safe from the obstacle.


Inventors:
TAKAGI TSUNEKICHI
Application Number:
JP2007226661A
Publication Date:
March 19, 2009
Filing Date:
August 31, 2007
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIHON DENSAN KK
International Classes:
H02P3/06
Attorney, Agent or Firm:
坂根 剛