Title:
エレベータの制御装置及びその制御方法
Document Type and Number:
Japanese Patent JP5446627
Kind Code:
B2
Abstract:
An elevator control device includes a vector controller that calculates a voltage command required for driving an elevator cage, a carrier frequency switch circuit that outputs a carrier frequency signal, and a power converter that performs PWM control based on the voltage command and the carrier frequency signal, generates an AC power and supplies the AC power to an AC motor. The carrier frequency switch circuit changes the carrier frequency signal when a torque command for driving the AC motor reaches a torque limit value. Thus, it is possible to continuously operate an elevator without causing damage to a switching element of the power converter.
Inventors:
Hiroaki Oya
Masahiro Tanaka
Yoichi Yamamoto
Masahiro Tanaka
Yoichi Yamamoto
Application Number:
JP2009206603A
Publication Date:
March 19, 2014
Filing Date:
September 08, 2009
Export Citation:
Assignee:
Yaskawa Electric Co., Ltd.
International Classes:
B66B1/30
Domestic Patent References:
| JP10164884A | ||||
| JP2003192246A |
Attorney, Agent or Firm:
Hirofumi Masuda
Hiroyuki Masuda
Hiroyuki Masuda