Title:
ELEVATOR DEVICE
Document Type and Number:
Japanese Patent JP2016052233
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To open/close a door even if a boost trap capacitor has discharged, without complicated control, when boost trap capacitor is used in the main circuit of a door motor for controlling the opening/closing of the door of a car of an elevator device.SOLUTION: A door control part comprises: a voltage command operation part 5 that outputs a modulation voltage command of three-phase modulation system and lower 120-degree conduction two-phase modulation system; an inverter part 8 that controls a door motor 2; and a modulation system switching part 7. The inverter part 8 controls the door motor 2 in correspondence with output from the voltage command operation part 5. The modulation system switching part 7 includes: the function of switching from the three-phase modulation system to the lower 120-degree conduction two-phase modulation system when detecting the finish of discharge of a boost trap capacitor 26 after a car 1 stops; and the function of returning to the three-phase modulation system when detecting the first opening/closing of a door 10 after switching to the lower 120-degree conduction two-phase modulation system.SELECTED DRAWING: Figure 1
Inventors:
TERUNUMA TOMOAKI
TAKAYAMA NAOKI
FUKADA HIRONORI
SEKINO TAKASHI
WATANABE TAKESHI
TAKAYAMA NAOKI
FUKADA HIRONORI
SEKINO TAKASHI
WATANABE TAKESHI
Application Number:
JP2014177990A
Publication Date:
April 11, 2016
Filing Date:
September 02, 2014
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02M7/48; B66B13/14
Attorney, Agent or Firm:
Polaire Patent Business Corporation
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