Title:
POWERED SKYLIGHT SYSTEM
Document Type and Number:
Japanese Patent JPH08275568
Kind Code:
A
Abstract:
PURPOSE: To detect the full-open and full-closed positions of the window in a powered skylight system surely with no erroneous recognition at low cost.
CONSTITUTION: The powered skylight system for opening/closing the window by driving a DC motor 1 comprises means 3 for extracting the ripple components superposed on the current waveform during rotation of the DC motor, means 7 for determining presence of the ripple component, and a control means 8 for deciding that the rotation of DC motor stopped at a moment when the presence of ripple component is not determined and interrupting the drive power supply to the DC motor.
Inventors:
ADACHI SHINJI
Application Number:
JP6839695A
Publication Date:
October 18, 1996
Filing Date:
March 27, 1995
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
E05F15/10; E04D13/035; H02P3/08; H02P7/06; (IPC1-7): H02P3/08; E04D13/035; E05F15/10; H02P7/06
Attorney, Agent or Firm:
西澤 利夫