JPH01110886A - Abnormal operation preventing method for pump - Google Patents

Abnormal operation preventing method for pump

Info

Publication number
JPH01110886A
JPH01110886A JP6903187A JP6903187A JPH01110886A JP H01110886 A JPH01110886 A JP H01110886A JP 6903187 A JP6903187 A JP 6903187A JP 6903187 A JP6903187 A JP 6903187A JP H01110886 A JPH01110886 A JP H01110886A
Authority
JP
Japan
Prior art keywords
value
power
pump
condition
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6903187A
Other languages
Japanese (ja)
Inventor
Takahisa Akahori
Hiroyuki Chino
Ikuo Hirota
Osamu Oura
Original Assignee
Ebara Densan:Kk
Toa Giden Kk
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebara Densan:Kk, Toa Giden Kk filed Critical Ebara Densan:Kk
Priority to JP6903187A priority Critical patent/JPH01110886A/en
Publication of JPH01110886A publication Critical patent/JPH01110886A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To promote the improvement of reliability with less decision error by cutting off a driving current when an electric motor obtains a detection value of its input power not more than a predetermined abnormal operation condition value.
CONSTITUTION: In a power detecting circuit 11, performing calculation containing a power factor being based on an input voltage value and active current value, a power value is obtained and given to a comparator circuit 12. Power in a racing condition or in an excessively small loaded condition is left as confirmed previously in the comparator circuit 12, and the critical power value of permissible limit is left as determined as the preset value. Comparing a detection power value, when it obtains not more than the critical power value, feeding a signal to a pump operation circuit 13, an electromagnetic relay 14 is excited cutting off a switch 7, and stopping an electric motor 1, a pump is stopped.
COPYRIGHT: (C)1989,JPO&Japio
JP6903187A 1987-03-25 1987-03-25 Abnormal operation preventing method for pump Pending JPH01110886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6903187A JPH01110886A (en) 1987-03-25 1987-03-25 Abnormal operation preventing method for pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6903187A JPH01110886A (en) 1987-03-25 1987-03-25 Abnormal operation preventing method for pump

Publications (1)

Publication Number Publication Date
JPH01110886A true JPH01110886A (en) 1989-04-27

Family

ID=13390805

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6903187A Pending JPH01110886A (en) 1987-03-25 1987-03-25 Abnormal operation preventing method for pump

Country Status (1)

Country Link
JP (1) JPH01110886A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017187982A1 (en) * 2016-04-25 2017-11-02 株式会社ミクニ Light load abnormality determination method for electric oil pump

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835283A (en) * 1981-08-27 1983-03-01 Ishikawajima Harima Heavy Ind Co Ltd Overload prevention device of compressor
JPS59581A (en) * 1982-06-24 1984-01-05 Mitsubishi Electric Corp Apparatus for detecting idling of pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835283A (en) * 1981-08-27 1983-03-01 Ishikawajima Harima Heavy Ind Co Ltd Overload prevention device of compressor
JPS59581A (en) * 1982-06-24 1984-01-05 Mitsubishi Electric Corp Apparatus for detecting idling of pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017187982A1 (en) * 2016-04-25 2017-11-02 株式会社ミクニ Light load abnormality determination method for electric oil pump
CN109072901A (en) * 2016-04-25 2018-12-21 株式会社三国 The light load abnormal determination method of electric oil pump
CN109072901B (en) * 2016-04-25 2020-08-18 株式会社三国 Light load abnormality determination method for electric oil pump
DE112017002167B4 (en) 2016-04-25 2022-03-24 Mikuni Corporation Light load anomaly determination method for an electric oil pump

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