Title:
【発明の名称】モ―タの過負荷監視装置
Document Type and Number:
Japanese Patent JP2542095
Kind Code:
B2
Abstract:
An over-loading detection system periodically samples motor operating parameter, e.g. a revolution speed and an output torque at a predetermined relatively short sampling period. Based on the sampled motor operating parameter, ratio of the output torque and a predetermined over-load rating torque is derived and stored. Over-load detection is performed with respect to a plurality of sampled ratio of the output torque and the over-load rating torque by deriving a running average and comparing the derived running average value with a predetermined threshold.
Inventors:
SANO KO
MIZUSHINA FUMIO
GOTO TAKASHI
MARUKI TOSHIMITSU
NAGANUMA YUKIO
MIZUSHINA FUMIO
GOTO TAKASHI
MARUKI TOSHIMITSU
NAGANUMA YUKIO
Application Number:
JP32081989A
Publication Date:
October 09, 1996
Filing Date:
December 11, 1989
Export Citation:
Assignee:
JATOKO KK
MEIDENSHA KK
MEIDENSHA KK
International Classes:
G01R31/34; G01M13/02; H02H7/085; (IPC1-7): H02H7/085; G01M13/02; G01R31/34
Domestic Patent References:
| JP52132320A | ||||
| JP5587060A | ||||
| JP56111474A | ||||
| JP5838833A | ||||
| JP6131942A | ||||
| JP270936A | ||||
| JP5843403Y2 | ||||
| JP5847425Y2 |
Other References:
【文献】米国特許3890832(US,A)
【文献】米国特許3898875(US,A)
【文献】米国特許3898875(US,A)
Attorney, Agent or Firm:
Fujiya Shiga (2 outside)