Title:
DETECTING CIRCUIT FOR MAXIMUM CURRENT
Document Type and Number:
Japanese Patent JPS56145796
Kind Code:
A
Abstract:
PURPOSE:To control a DC motor under an overload condition so as not to be tripped by flowing currents flowing in by the counterelectromotive voltage of other DC motors through a thyristor transducer regarding the DC motor under the overload condition. CONSTITUTION:When one or two or more DC motors among DC motors 5, 5... are brought to overload, currents obtained from a DC current appliance 14 of the motor under overload are output from a current detector 16 through a composing circuit 15. The output of the current detector 16 is forwarded to a current commanding appliance 9 through a comparator 17A or 17B. The output of the current commanding appliance 9 is transmitted to a thyristor transducer 4 through a current regulator 11 and an automatic pulse shifter 12, and the counterelectromotive force of the DC motors 5, 5... except the motor under overload is recovered.
Inventors:
WATANABE YOSHIKAZU
ASAKAWA YUKIO
ASAKAWA YUKIO
Application Number:
JP4796380A
Publication Date:
November 12, 1981
Filing Date:
April 14, 1980
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02P5/68; (IPC1-7): H02P7/68