Title:
PREVENTIVE DEVICE FOR OVERVOLTAGE
Document Type and Number:
Japanese Patent JPS53121123
Kind Code:
A
Abstract:
PURPOSE:To prevent an overvoltage caused by self excitation phenomenon in an induction motor, when in a time of power source interruption, by means of isolating a power-factor improvement condenser from AC power source with poweroff detection signal of power-off detector.
Inventors:
MOTOBE MITSUSACHI
HORI KOUSEI
FUKUDA ETSUHIRO
HORI KOUSEI
FUKUDA ETSUHIRO
Application Number:
JP3526077A
Publication Date:
October 23, 1978
Filing Date:
March 31, 1977
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02H7/08; H02H7/09; H02P21/36; H02P23/00; H02P23/07; H02P23/26; H02P27/05; (IPC1-7): H02H7/09; H02P7/36