JPS6423797A - Frequency controller for refrigerating cycle - Google Patents

Frequency controller for refrigerating cycle

Info

Publication number
JPS6423797A
JPS6423797A JP62178307A JP17830787A JPS6423797A JP S6423797 A JPS6423797 A JP S6423797A JP 62178307 A JP62178307 A JP 62178307A JP 17830787 A JP17830787 A JP 17830787A JP S6423797 A JPS6423797 A JP S6423797A
Authority
JP
Japan
Prior art keywords
value
frequency
current
current range
estimated
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
JP62178307A
Other languages
Japanese (ja)
Inventor
Fumio Matsuoka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62178307A priority Critical patent/JPS6423797A/en
Publication of JPS6423797A publication Critical patent/JPS6423797A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To continuously keep operation even at the time of overload and shorten rise, by increasing frequency for correction when an estimated current value is less than a set current range, and by reducing the frequency for correction when the estimated current value exceeds the set current range. CONSTITUTION:From a current range discriminator 17, the output of '+1 approx.< is directed to an operation speed retainer 10 when the value of estimated primary current is less than the low value of a previously set current value, and the output of the value of '-1' is directed to the retainer 10 when the estimated primary current is greater than the high value of the previously set current range. By the operation speed retainer 10, a motor operation controller 12 is controlled so that frequency may be corrected by increment in case the signal of the current range discriminator 17 is '+1', and so that the frequency may be corrected by reduction in case that the signal is '-1'.
JP62178307A 1987-07-17 1987-07-17 Frequency controller for refrigerating cycle Pending JPS6423797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62178307A JPS6423797A (en) 1987-07-17 1987-07-17 Frequency controller for refrigerating cycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62178307A JPS6423797A (en) 1987-07-17 1987-07-17 Frequency controller for refrigerating cycle

Publications (1)

Publication Number Publication Date
JPS6423797A true JPS6423797A (en) 1989-01-26

Family

ID=16046187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62178307A Pending JPS6423797A (en) 1987-07-17 1987-07-17 Frequency controller for refrigerating cycle

Country Status (1)

Country Link
JP (1) JPS6423797A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580753A (en) * 1991-02-28 1993-04-02 Yamaha Corp Electronic musical instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580753A (en) * 1991-02-28 1993-04-02 Yamaha Corp Electronic musical instrument

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