JPS57146080A - Controlling apparatus for feed water pump - Google Patents

Controlling apparatus for feed water pump

Info

Publication number
JPS57146080A
JPS57146080A JP3037681A JP3037681A JPS57146080A JP S57146080 A JPS57146080 A JP S57146080A JP 3037681 A JP3037681 A JP 3037681A JP 3037681 A JP3037681 A JP 3037681A JP S57146080 A JPS57146080 A JP S57146080A
Authority
JP
Japan
Prior art keywords
motor
contact
flow rate
feed water
inverter
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
JP3037681A
Other languages
Japanese (ja)
Inventor
Keizo Shinkai
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.)
TAKASAGO PUMP KK
Original Assignee
TAKASAGO PUMP 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 TAKASAGO PUMP KK filed Critical TAKASAGO PUMP KK
Priority to JP3037681A priority Critical patent/JPS57146080A/en
Publication of JPS57146080A publication Critical patent/JPS57146080A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/029—Stopping of pumps, or operating valves, on occurrence of unwanted conditions for pumps operating in parallel

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To reduce energy consumption in parallel operation of a plurality of feed water pumps, by controlling the flow rate by attaching an inverter to a motor for only one pump, and feeding current to other pumps directly from a power source, thereby stopping operation of the pumps or operating them under most efficient conditions. CONSTITUTION:When a switch S is turned ON, an electromagnetic switch 1C is energized and contacts 1C1, 1C2 are closed, which causes energization of an electromagnetic switch 2C, closing of a contact 2C1 and starting of an induction motor M1 and hence a pump P1. Here, output frequency of an inverter 2 is controlled by an output signal of a pressure sensor 3 such that pressure in a feed water pipe 4 is kept constant. When the flow rate of water is increased to Q.1a, a contact Q1 of a flow-rate relay 5 is closed and a contact 3c is energized, which causes closing of contacts 3C1, 3C3, 3C4, 3C5 and opening of a contact 3C2, so that a motor M1 is operated at a full speed by a power source. On the other hand, when the flow rate reaches Q2a, a motor M2 is operated at a speed controlled by the inverter 2, whereas the motor M2 is operated at a full speed when the flow rate is Q3a.
JP3037681A 1981-03-02 1981-03-02 Controlling apparatus for feed water pump Pending JPS57146080A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3037681A JPS57146080A (en) 1981-03-02 1981-03-02 Controlling apparatus for feed water pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3037681A JPS57146080A (en) 1981-03-02 1981-03-02 Controlling apparatus for feed water pump

Publications (1)

Publication Number Publication Date
JPS57146080A true JPS57146080A (en) 1982-09-09

Family

ID=12302154

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3037681A Pending JPS57146080A (en) 1981-03-02 1981-03-02 Controlling apparatus for feed water pump

Country Status (1)

Country Link
JP (1) JPS57146080A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002332972A (en) * 2001-05-10 2002-11-22 Sanken Electric Co Ltd Constant pressure feed water control device
CN103452824A (en) * 2013-09-06 2013-12-18 武汉理工大学 Fan and water pump energy saving system adopting minimum power algorithm based on flow-power curve
CN105604924A (en) * 2016-02-17 2016-05-25 苏州中锦电气科技有限公司 Energy-saving variable frequency pump control cabinet
CN114413458A (en) * 2022-01-25 2022-04-29 清华大学 Water pump parallel operation control method, device, equipment and medium for air-conditioning water system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002332972A (en) * 2001-05-10 2002-11-22 Sanken Electric Co Ltd Constant pressure feed water control device
CN103452824A (en) * 2013-09-06 2013-12-18 武汉理工大学 Fan and water pump energy saving system adopting minimum power algorithm based on flow-power curve
CN105604924A (en) * 2016-02-17 2016-05-25 苏州中锦电气科技有限公司 Energy-saving variable frequency pump control cabinet
CN114413458A (en) * 2022-01-25 2022-04-29 清华大学 Water pump parallel operation control method, device, equipment and medium for air-conditioning water system
CN114413458B (en) * 2022-01-25 2022-12-09 清华大学 Water pump parallel operation control method, device, equipment and medium for air-conditioning water system

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