Elevator control device

The present invention provides an elevator control device for restarting up a synchronous motor while restraining the generation of electromagnetic noise in the condition of restarting up the synchronous motor when a rotary encoder has faults. The abnormities of the rotary encoder is detected to obt...

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Bibliographic Details
Main Authors TOMOAKI TERUNUMA, HIRONORI FUKATA, TOMOAKI MINEO, MASAHIRO TAGO, NAOKI TAKAYAMA, TAKAMICHI HOSHINO, KAZUTO NAGANUMA
Format Patent
LanguageEnglish
Published 03.02.2016
Subjects
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
HAULING
HOISTING
LIFTING
PERFORMING OPERATIONS
TRANSPORTING
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Summary:The present invention provides an elevator control device for restarting up a synchronous motor while restraining the generation of electromagnetic noise in the condition of restarting up the synchronous motor when a rotary encoder has faults. The abnormities of the rotary encoder is detected to obtain the current, flowing through armature coils, of the motor until the synchronous motor is stopped by dynamic braking, the current of the motor is used for calculating the pole position of the time point of stopping the synchronous motor, the synchronous motor is restarted up according to the pole position to move an elevator car to a given floor. Thus, the generation of electromagnetic noise when a synchronous motor is restarted up may be eliminated due to the calculation of a pole position with no need for applying voltage to the synchronous motor.
Bibliography:Application Number: CN20151437415