Title:
CONTROLLER FOR INDUCTION MOTOR
Document Type and Number:
Japanese Patent JP3585031
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a controller suitable for an induction motor as a power source of an elevator or the like.
SOLUTION: A counter 17, a comparator 18 and a switching unit 19 are added to a conventional controller. When an operating time of the induction motor 3 is long, a function for free running the motor 3 by cutting off an output of a voltage type inverter 2 is imparted when an operation command of the motor 3 is dropped.
Inventors:
Hiroyuki Yonezawa
Application Number:
JP2000038311A
Publication Date:
November 04, 2004
Filing Date:
February 16, 2000
Export Citation:
Assignee:
Fuji Electric Equipment Control Co., Ltd.
International Classes:
H02P3/26; H02P27/06; (IPC1-7): H02P3/26; H02P7/63
Domestic Patent References:
| JP7067371A | ||||
| JP7123786A | ||||
| JP9023676A | ||||
| JP11180687A |
Attorney, Agent or Firm:
Iwao Yamaguchi
Yoshihide Komada
Kiyoshi Matsuzaki
Yoshihide Komada
Kiyoshi Matsuzaki
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