JPS57119672A - Controlling system of output current for frequency converter device - Google Patents

Controlling system of output current for frequency converter device

Info

Publication number
JPS57119672A
JPS57119672A JP56003813A JP381381A JPS57119672A JP S57119672 A JPS57119672 A JP S57119672A JP 56003813 A JP56003813 A JP 56003813A JP 381381 A JP381381 A JP 381381A JP S57119672 A JPS57119672 A JP S57119672A
Authority
JP
Japan
Prior art keywords
current
power factor
load
command value
polarity
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
JP56003813A
Other languages
Japanese (ja)
Other versions
JPS638709B2 (en
Inventor
Kazuya Endo
Tadamasa Niimi
Hiroshi Osawa
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP56003813A priority Critical patent/JPS57119672A/en
Publication of JPS57119672A publication Critical patent/JPS57119672A/en
Publication of JPS638709B2 publication Critical patent/JPS638709B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/27—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency

Landscapes

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

Abstract

PURPOSE:To reduce a variation in gain in a control system by a method wherein the power factor of a load is decreased by supplying a predetermined amount of reactive current from a power factor changing means in a region increasing the intermittent degree of an output current at low level. CONSTITUTION:A positive-polarity current and a negative-polarity current are supplied to a load L such as an AC machine from a thyristor bridge A and a thyristor bridge B respectively and the currents are controlled by a control circuit PC in accordance with the polarity of a command value i*. At that time, the torque current component value i2* of the motor L is supplied to a power factor changing signal generator 10 and a power factor changing signal DELTAi1* is generated to add a magnetizing current component command value i1* and a magnetizing current component command value (i1*)' is generated. Therefore, the power factor of the load is decreased at a low-load current region and the level of th command value is increased to reduce a variation in gain of a control system by eliminating a current intermittent phenomenon and stable control can be performed.
JP56003813A 1981-01-16 1981-01-16 Controlling system of output current for frequency converter device Granted JPS57119672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56003813A JPS57119672A (en) 1981-01-16 1981-01-16 Controlling system of output current for frequency converter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56003813A JPS57119672A (en) 1981-01-16 1981-01-16 Controlling system of output current for frequency converter device

Publications (2)

Publication Number Publication Date
JPS57119672A true JPS57119672A (en) 1982-07-26
JPS638709B2 JPS638709B2 (en) 1988-02-24

Family

ID=11567623

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56003813A Granted JPS57119672A (en) 1981-01-16 1981-01-16 Controlling system of output current for frequency converter device

Country Status (1)

Country Link
JP (1) JPS57119672A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016019294A (en) * 2014-07-04 2016-02-01 株式会社安川電機 Matrix converter, power generation system, and power factor control method
CN105763121A (en) * 2016-03-03 2016-07-13 湖南大学 Synchronous electric main shaft acceleration strong magnetic control method for variable-load superhigh-speed grinding

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016019294A (en) * 2014-07-04 2016-02-01 株式会社安川電機 Matrix converter, power generation system, and power factor control method
US9923456B2 (en) 2014-07-04 2018-03-20 Kabushiki Kaisha Yaskawa Denki Matrix convertor, power generation system, and method for controlling power factor
CN105763121A (en) * 2016-03-03 2016-07-13 湖南大学 Synchronous electric main shaft acceleration strong magnetic control method for variable-load superhigh-speed grinding
CN105763121B (en) * 2016-03-03 2018-05-01 湖南大学 Synchronous electric spindle towards varying load superhigh speed grinding accelerates strong magnetic control method

Also Published As

Publication number Publication date
JPS638709B2 (en) 1988-02-24

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