JPS5797368A - Irregular magnetism preventing device for transformer - Google Patents

Irregular magnetism preventing device for transformer

Info

Publication number
JPS5797368A
JPS5797368A JP55171698A JP17169880A JPS5797368A JP S5797368 A JPS5797368 A JP S5797368A JP 55171698 A JP55171698 A JP 55171698A JP 17169880 A JP17169880 A JP 17169880A JP S5797368 A JPS5797368 A JP S5797368A
Authority
JP
Japan
Prior art keywords
transformer
irregular
current
amplifier
magnetism
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
JP55171698A
Other languages
Japanese (ja)
Inventor
Ikuro Hirano
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.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha 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 Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Priority to JP55171698A priority Critical patent/JPS5797368A/en
Publication of JPS5797368A publication Critical patent/JPS5797368A/en
Pending 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
    • H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/12—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by varying magnetic bias

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To reduce the conversion loss of a transformer by utilizing the asymmetry of the exciting current of the transformer and providing a compensating coil for compensating the irregular magnetism in the transformer, thereby preventing the irregular magnetism of the transformer. CONSTITUTION:When a core is irregularly magnetized, the positive and negative of a current are produced asymmetrically, and the positive and negative outputs of a differential amplifier 7 are produced asymmetrically in proportion to the irregular magnetism. The positive and negative outputs of the amplifier 7 are inputted individually to the inputs of a peak detector 8 for detecting the peak values of the output for each polarity of the positve and negative outputs, and the both polarity outputs of the detector 8 are inputted as differential inputs of a differential amplifier 9, which thus produces an output proportional to the exciting peak value being asymmetrical to the output of the amplifier 9. This output is amplified by a DC amplifier 10, which thus flows a compensating current to the compensating coil 4A, and allows the current to control in negative feedback flowing the exciting current of the transformer 4 in a direction for reducing the exciting current.
JP55171698A 1980-12-05 1980-12-05 Irregular magnetism preventing device for transformer Pending JPS5797368A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55171698A JPS5797368A (en) 1980-12-05 1980-12-05 Irregular magnetism preventing device for transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171698A JPS5797368A (en) 1980-12-05 1980-12-05 Irregular magnetism preventing device for transformer

Publications (1)

Publication Number Publication Date
JPS5797368A true JPS5797368A (en) 1982-06-17

Family

ID=15928019

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171698A Pending JPS5797368A (en) 1980-12-05 1980-12-05 Irregular magnetism preventing device for transformer

Country Status (1)

Country Link
JP (1) JPS5797368A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6451511A (en) * 1987-08-21 1989-02-27 Toshiba Corp Static reactive power compensator
US4916402A (en) * 1987-09-22 1990-04-10 Mitsubishi Denki Kabushiki Kaisha Apparatus for detecting direct current magnetic flux deflections of an electrical transformer
WO2009026968A1 (en) * 2007-08-31 2009-03-05 Abb Technology Ag Method and device to compensate for an asymmetrical dc bias current in a power transformer connected to a high voltage converter
WO2015075983A1 (en) * 2013-11-21 2015-05-28 株式会社日立製作所 Power conversion device and power conversion device control method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6451511A (en) * 1987-08-21 1989-02-27 Toshiba Corp Static reactive power compensator
US4916402A (en) * 1987-09-22 1990-04-10 Mitsubishi Denki Kabushiki Kaisha Apparatus for detecting direct current magnetic flux deflections of an electrical transformer
WO2009026968A1 (en) * 2007-08-31 2009-03-05 Abb Technology Ag Method and device to compensate for an asymmetrical dc bias current in a power transformer connected to a high voltage converter
US8339818B2 (en) 2007-08-31 2012-12-25 Abb Technology Ag Method and device to compensate for an asymmetrical DC bias current in a power transformer connected to a high voltage converter
WO2015075983A1 (en) * 2013-11-21 2015-05-28 株式会社日立製作所 Power conversion device and power conversion device control method

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