JPS55141997A - Ac motor controlling method - Google Patents

Ac motor controlling method

Info

Publication number
JPS55141997A
JPS55141997A JP5065979A JP5065979A JPS55141997A JP S55141997 A JPS55141997 A JP S55141997A JP 5065979 A JP5065979 A JP 5065979A JP 5065979 A JP5065979 A JP 5065979A JP S55141997 A JPS55141997 A JP S55141997A
Authority
JP
Japan
Prior art keywords
voltage
motor
circuit
constant
load current
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.)
Granted
Application number
JP5065979A
Other languages
Japanese (ja)
Other versions
JPS6327959B2 (en
Inventor
Kazuhiro Sugi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5065979A priority Critical patent/JPS55141997A/en
Publication of JPS55141997A publication Critical patent/JPS55141997A/en
Publication of JPS6327959B2 publication Critical patent/JPS6327959B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
    • H02P2201/03—AC-DC converter stage controlled to provide a defined DC link voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To enlarge the operation maximum frequency and also to decrease a commutation voltage by decreasing induced voltage of an AC motor in accordance as a load decreases. CONSTITUTION:A main circuit comprises a rectifying circuit 41 to control voltage on an AC motor 29, a smoothing reactor 43 and an inverter circuit 44; the AC motor 29 is subjected to variable speed control by a voltage controlling circuit 51 and a frequency controlling circuit 52. Where a mean value of load current is constant or over, a voltage reference generating circuit 53 is given a voltage set normally on a speed base 54 according to a constant V/f condition. When the motor runs on a light load at a constant speed, the mean value of the load current comes below set point 55, which is not to satisfy a commutation condition, therefore the voltage reference is weakened according to a set pattern in compliance with the load current.
JP5065979A 1979-04-24 1979-04-24 Ac motor controlling method Granted JPS55141997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5065979A JPS55141997A (en) 1979-04-24 1979-04-24 Ac motor controlling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5065979A JPS55141997A (en) 1979-04-24 1979-04-24 Ac motor controlling method

Publications (2)

Publication Number Publication Date
JPS55141997A true JPS55141997A (en) 1980-11-06
JPS6327959B2 JPS6327959B2 (en) 1988-06-06

Family

ID=12865070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5065979A Granted JPS55141997A (en) 1979-04-24 1979-04-24 Ac motor controlling method

Country Status (1)

Country Link
JP (1) JPS55141997A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6678777B2 (en) 2017-01-23 2020-04-08 東芝三菱電機産業システム株式会社 Control device for synchronous motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513046A (en) * 1974-05-29 1976-01-12 Svenska Flaektfabriken Ab

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513046A (en) * 1974-05-29 1976-01-12 Svenska Flaektfabriken Ab

Also Published As

Publication number Publication date
JPS6327959B2 (en) 1988-06-06

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