JPS5720577A - Speed controller with variable-frequency power source for electric motor for driving screw compressor - Google Patents

Speed controller with variable-frequency power source for electric motor for driving screw compressor

Info

Publication number
JPS5720577A
JPS5720577A JP9330780A JP9330780A JPS5720577A JP S5720577 A JPS5720577 A JP S5720577A JP 9330780 A JP9330780 A JP 9330780A JP 9330780 A JP9330780 A JP 9330780A JP S5720577 A JPS5720577 A JP S5720577A
Authority
JP
Japan
Prior art keywords
output
screw compressor
frequency
detector
variable
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
JP9330780A
Other languages
Japanese (ja)
Inventor
Wahei Inoue
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.)
Mayekawa Manufacturing Co
Original Assignee
Mayekawa Manufacturing Co
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 Mayekawa Manufacturing Co filed Critical Mayekawa Manufacturing Co
Priority to JP9330780A priority Critical patent/JPS5720577A/en
Publication of JPS5720577A publication Critical patent/JPS5720577A/en
Pending legal-status Critical Current

Links

Landscapes

  • Applications Or Details Of Rotary Compressors (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To stably control a system, by comparing the output of pulsation frequency, which is included in discharge pressure, with a set value, which is regulated depending on heat load, to control the speed of an AC motor.
CONSTITUTION: A pulsation frequency detector 4 is connected to the discharge pipe of a screw compressor 1. The output of the detector 4 is applied to a frequency controller 7 through a regulator 5. A suction pressure detector 10 is connected to the suction pipe of the screw compressor 1. The output of the detector 10 is applied to a frequency setting unit 8 through the regulator 5. The output of the unit 8 is applied to the frequency controller 7. The controller 7 compares the output of pulsation frequency with a set value controlled depending on heat load, to control the speed of an AC motor 2. According to this constitution, the time constant of a circuit is made small. For that reason, stable control with less time lag is enabled.
COPYRIGHT: (C)1982,JPO&Japio
JP9330780A 1980-07-10 1980-07-10 Speed controller with variable-frequency power source for electric motor for driving screw compressor Pending JPS5720577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9330780A JPS5720577A (en) 1980-07-10 1980-07-10 Speed controller with variable-frequency power source for electric motor for driving screw compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9330780A JPS5720577A (en) 1980-07-10 1980-07-10 Speed controller with variable-frequency power source for electric motor for driving screw compressor

Publications (1)

Publication Number Publication Date
JPS5720577A true JPS5720577A (en) 1982-02-03

Family

ID=14078669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9330780A Pending JPS5720577A (en) 1980-07-10 1980-07-10 Speed controller with variable-frequency power source for electric motor for driving screw compressor

Country Status (1)

Country Link
JP (1) JPS5720577A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6047772A (en) * 1983-08-24 1985-03-15 Bridgestone Corp Resilient crawler
JPS60253858A (en) * 1984-05-30 1985-12-14 Doudensei Muki Kagoubutsu Gijutsu Kenkyu Kumiai Gas sensor
US4581204A (en) * 1983-06-02 1986-04-08 Siemens Aktiengesellschaft Thin film gas sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426501A (en) * 1977-07-30 1979-02-28 Kawamoto Pump Mfg Constant pressure water feeder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426501A (en) * 1977-07-30 1979-02-28 Kawamoto Pump Mfg Constant pressure water feeder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4581204A (en) * 1983-06-02 1986-04-08 Siemens Aktiengesellschaft Thin film gas sensor
JPS6047772A (en) * 1983-08-24 1985-03-15 Bridgestone Corp Resilient crawler
JPS60253858A (en) * 1984-05-30 1985-12-14 Doudensei Muki Kagoubutsu Gijutsu Kenkyu Kumiai Gas sensor

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