Title:
可変速駆動装置
Document Type and Number:
Japanese Patent JP4187308
Kind Code:
B2
Abstract:
A multiple-wound, three-phase, variable speed motor 1 having N independent winding sets is driven by N inverters, each responding to 1/N of the torque and excitation current commands, and the torque current is limited as a function of N times the limiting current each inverter may tolerate, when all inverters are functioning. When M inverters fail, they are disconnected from the motor, the torque current is limited as function of N-M times the limiting current each inverter may tolerate. The remaining N-M inverters may each respond to 1/(N-M) of the torque and excitation commands. The excitation current may be maximized as (N-M ) times the limiting current divided by the square root of two. The speed command may be predetermined by the integration over an acceleration interval, of the maximum acceleration achievable with torque available from those of the inverters which have not failed, in view of the inverters' current limits.
Inventors:
Kenji Oshima
Tetsuo Yamada
Takashi Kodama
Yasuhiro Yoshida
Tetsuo Yamada
Takashi Kodama
Yasuhiro Yoshida
Application Number:
JP16805098A
Publication Date:
November 26, 2008
Filing Date:
June 16, 1998
Export Citation:
Assignee:
Nippon Otis Elevator Co., Ltd.
KABUSHIKI KAISHA MEIDENSHA
KABUSHIKI KAISHA MEIDENSHA
International Classes:
B66B1/30; H02P21/00; B66B1/00; B66B1/28; B66B1/34; B66B5/00; B66B5/02; H02P7/00; H02P27/04; H02P27/06; B66B; H02P
Domestic Patent References:
| JP6245575A | ||||
| JP7236295A | ||||
| JP7111708A | ||||
| JP6098410A | ||||
| JP3036991A | ||||
| JP9275699A | ||||
| JP4365770A | ||||
| JP63314193A |
Foreign References:
| WO1998008297A1 |
Attorney, Agent or Firm:
Tsuyoshi Hashimoto