Title:
SPEED CONTROLLER WITH AUTOMATIC OVERLOAD REGULATION CIRCUIT FOR BLOWER OR THE LIKE
Document Type and Number:
Japanese Patent JPS5513601
Kind Code:
A
Abstract:
PURPOSE:To eliminate a trouble due to overload and perform an efficient run, by fully opening a damper to eliminate pressure loss and limiting the revolution speed of an electric motor in terms of its current. CONSTITUTION:A speed calculation control circuit 5 having an output limiter generates an output reference signal for the current of the motor on the basis of a speed set signal (a) from a speed setting circuit 1 and a speed feedback signal (d) from a speed detector 2. The output reference signal is limited not to exceed a prescribed level. A current calculation control circuit 6 supplies such a signal (c) to a motor controller 7 that the reference signal (b) coincides with a current feedback signal (i) from a current detector 4.
Inventors:
FUKUI YOSHIO
Application Number:
JP2588278A
Publication Date:
January 30, 1980
Filing Date:
March 06, 1978
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
F04D27/00; F04B49/06; H02P5/00; H02P29/00; (IPC1-7): F04B49/06; F04D27/00; H02P5/00