JPS5779284A - Pump driving apparatus - Google Patents

Pump driving apparatus

Info

Publication number
JPS5779284A
JPS5779284A JP15658780A JP15658780A JPS5779284A JP S5779284 A JPS5779284 A JP S5779284A JP 15658780 A JP15658780 A JP 15658780A JP 15658780 A JP15658780 A JP 15658780A JP S5779284 A JPS5779284 A JP S5779284A
Authority
JP
Japan
Prior art keywords
pump
eddy current
current joint
excitation
flow rate
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
JP15658780A
Other languages
Japanese (ja)
Inventor
Toshihide Hiroshima
Shinji Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Manufacturing Co Ltd
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 Yaskawa Electric Manufacturing Co Ltd filed Critical Yaskawa Electric Manufacturing Co Ltd
Priority to JP15658780A priority Critical patent/JPS5779284A/en
Publication of JPS5779284A publication Critical patent/JPS5779284A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To reduce the dimension of a tank and improve the energy saving effect by operating a pump intermittently by turning ON and OFF only excitation of an eddy current joint when the demanded flow rate reduces below a fixed value and turning ON and OFF the power source for a motor when the flow rate reduces further.
CONSTITUTION: When the demanded water amount reduces, an operating instruction 14A is output, and excitation of an eddy current joint 3 is set OFF by a speed regulator 10, and a pump 1 is stopped. Likewise, operation and stop of the variable-speed pump 1 connected with the output shaft of the eddy current joint 3 is controlled by intermittently turning ON and OFF excitation of the eddy current joint 3, while operation of a driving motor 2 is continued during the time in small flow rate, and the pump 1 and a pressure tank 7 repeat water supply alternately. When the demanded water amount reduces further, the water supply time by the pressure tank 7 is prolonged, and a time circuit 17 transmits the operation instruction 17A, and a contactor 18 is opened, then the driving motor 2 and the pump 1 are brought into stop. Thus, the energy saving effect can be improved, and the dimension of the pressure tank 7 can be reduced.
COPYRIGHT: (C)1982,JPO&Japio
JP15658780A 1980-11-05 1980-11-05 Pump driving apparatus Pending JPS5779284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15658780A JPS5779284A (en) 1980-11-05 1980-11-05 Pump driving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15658780A JPS5779284A (en) 1980-11-05 1980-11-05 Pump driving apparatus

Publications (1)

Publication Number Publication Date
JPS5779284A true JPS5779284A (en) 1982-05-18

Family

ID=15631019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15658780A Pending JPS5779284A (en) 1980-11-05 1980-11-05 Pump driving apparatus

Country Status (1)

Country Link
JP (1) JPS5779284A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62203986A (en) * 1986-03-04 1987-09-08 Nikoku Kikai Kogyo Kk Pump automatic control system for controlling number of revolutions of pump by varying storage target value

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62203986A (en) * 1986-03-04 1987-09-08 Nikoku Kikai Kogyo Kk Pump automatic control system for controlling number of revolutions of pump by varying storage target value

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