JPS57173396A - Controlling method for pwm control converter - Google Patents

Controlling method for pwm control converter

Info

Publication number
JPS57173396A
JPS57173396A JP56057088A JP5708881A JPS57173396A JP S57173396 A JPS57173396 A JP S57173396A JP 56057088 A JP56057088 A JP 56057088A JP 5708881 A JP5708881 A JP 5708881A JP S57173396 A JPS57173396 A JP S57173396A
Authority
JP
Japan
Prior art keywords
signal
output
integrator
comparator
converter
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
JP56057088A
Other languages
Japanese (ja)
Inventor
Toshiaki Okuyama
Yuzuru Kubota
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56057088A priority Critical patent/JPS57173396A/en
Publication of JPS57173396A publication Critical patent/JPS57173396A/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
    • 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
    • H02P27/08—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 with pulse width modulation
    • 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

Landscapes

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

Abstract

PURPOSE:To avoid the impossibility of the operation of a PWM control converter due to the saturation of an AC transformer by calculating the output current of the converter in accordance with the signal obtained by integrating a PWM signal at the time of operating a low frequency and controlling it with the signal. CONSTITUTION:When an output frequency is low and a current transformer 7 saturates, a selecting circuit 13 outputs the signal of an integrator 10 in accordance with the signal of a discriminator 12 and applies it to a comparator 8. The output signal of the comparator 8 is a signal which decides the turning ON or turning OFF of GTO 1, 2 and has a relation of the same waveform as the output voltage of the U phase of the converter. An integrator 10 is an integrator havong primary delay characteristic with time constant equal to that of the coil of a motor 6, and when the output signal of the comparator 8 is inputted, a signal proportional to the motor current can be produced at its output.
JP56057088A 1981-04-17 1981-04-17 Controlling method for pwm control converter Pending JPS57173396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56057088A JPS57173396A (en) 1981-04-17 1981-04-17 Controlling method for pwm control converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56057088A JPS57173396A (en) 1981-04-17 1981-04-17 Controlling method for pwm control converter

Publications (1)

Publication Number Publication Date
JPS57173396A true JPS57173396A (en) 1982-10-25

Family

ID=13045735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56057088A Pending JPS57173396A (en) 1981-04-17 1981-04-17 Controlling method for pwm control converter

Country Status (1)

Country Link
JP (1) JPS57173396A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8076890B2 (en) * 2006-03-31 2011-12-13 Thk Co., Ltd. AC motor driving apparatus and control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8076890B2 (en) * 2006-03-31 2011-12-13 Thk Co., Ltd. AC motor driving apparatus and control method

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