Title:
BUCKET ELEVATOR DRIVING DEVICE AND METHOD OF CONTINUOUS UNLOADER
Document Type and Number:
Japanese Patent JP3496462
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To simplify and miniaturize the bucket elevator driving device of a continuous unloader which unloads cargo from a hold.
SOLUTION: This unloader has a bucket elevator which scrapes and unloads cargo in a hold by driving, using drive sprockets 23A, 23B, chains 25A, 25B to which a bucket 26 is attached. In this case, two induction motors 32AF-32BR are individually connected to the drive sprockets 23A, 23B via reduction gears 27A, 27B. The motors are subjected to vector control by individual motor drive circuit 34A, 34B, and are each subjected to synchronous control at startup on the basis of desired torque current values calculated by a desired value computing circuit included in the motor drive circuit 34A. After startup, the induction motors are subjected to independent vector control by the motor drive circuits 34A, 34B.
Inventors:
Kazuo Hosomi
Masamichi Okami
Suguru Ida
Hiroaki Ishikawa
Masamichi Okami
Suguru Ida
Hiroaki Ishikawa
Application Number:
JP16111997A
Publication Date:
February 09, 2004
Filing Date:
June 18, 1997
Export Citation:
Assignee:
JFE Steel Corporation
International Classes:
B65G23/08; B65G67/60; H02P21/00; H02P21/13; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P21/28; H02P23/07; H02P23/12; H02P23/14; H02P23/16; H02P25/022; H02P27/04; H02P27/08; (IPC1-7): B65G67/60; B65G23/08
Domestic Patent References:
| JP930654A | ||||
| JP8301456A | ||||
| JP8268566A |
Attorney, Agent or Firm:
Tetsuya Mori (3 others)
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