KR100329342B1 - Method for controlling instantaneous current at neutral point in 3 level converter/inverter system - Google Patents

Method for controlling instantaneous current at neutral point in 3 level converter/inverter system Download PDF

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Publication number
KR100329342B1
KR100329342B1 KR1019990014031A KR19990014031A KR100329342B1 KR 100329342 B1 KR100329342 B1 KR 100329342B1 KR 1019990014031 A KR1019990014031 A KR 1019990014031A KR 19990014031 A KR19990014031 A KR 19990014031A KR 100329342 B1 KR100329342 B1 KR 100329342B1
Authority
KR
South Korea
Prior art keywords
neutral point
current
vector
voltage
converter
Prior art date
Application number
KR1019990014031A
Other languages
Korean (ko)
Inventor
Chang Ho Choi
Dong Seok Hyun
Kwang Seob Kim
Yo Han Lee
Jae Hyeong Soe
Original Assignee
Poscon 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 Poscon Corp filed Critical Poscon Corp
Priority to KR1019990014031A priority Critical patent/KR100329342B1/en
Priority to KR1020000021267A priority patent/KR100330214B1/en
Application granted granted Critical
Publication of KR100329342B1 publication Critical patent/KR100329342B1/en

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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
    • H02P27/14—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 with three or more levels of 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
    • H02P27/06—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
    • H02P27/085—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 wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency

Abstract

PURPOSE: A method for controlling an instantaneous current at a neutral point in 3 level converter/inverter system is provided to control a voltage at a neutral point and instantaneously control a current flowing through a neutral point to zero. CONSTITUTION: A current outputted from a neutral point is calculated by multiplying an inverter output current by a vector. An offset voltage is obtained and the offset voltage is added to an initial command voltage of an inverter. A current flowing through a neutral point is transmitted to a converter controller. An output current of a converter is multiplied by the vector to calculate a current outputted by the neutral point. It is judged whether the current flowing through the neutral point is identical with a neutral point current which is calculated by multiplying an input current of the converter by a vector apply time. A power-factor is reduced to obtain a new command vector. A voltage offset value is obtained and is added to the command vector.
KR1019990014031A 1999-04-20 1999-04-20 Method for controlling instantaneous current at neutral point in 3 level converter/inverter system KR100329342B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019990014031A KR100329342B1 (en) 1999-04-20 1999-04-20 Method for controlling instantaneous current at neutral point in 3 level converter/inverter system
KR1020000021267A KR100330214B1 (en) 1999-04-20 2000-04-21 Apparatus and method for generating spreading code in cdma communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019990014031A KR100329342B1 (en) 1999-04-20 1999-04-20 Method for controlling instantaneous current at neutral point in 3 level converter/inverter system

Publications (1)

Publication Number Publication Date
KR100329342B1 true KR100329342B1 (en) 2002-03-22

Family

ID=37487691

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019990014031A KR100329342B1 (en) 1999-04-20 1999-04-20 Method for controlling instantaneous current at neutral point in 3 level converter/inverter system

Country Status (1)

Country Link
KR (1) KR100329342B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100707081B1 (en) 2006-01-27 2007-04-13 엘에스산전 주식회사 Apparatus and method for controlling instantaneous current

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH077957A (en) * 1993-06-14 1995-01-10 Toshiba Corp Power converter
JPH08317663A (en) * 1995-05-15 1996-11-29 Toshiba Corp Control device for clamped-neutral type power converter
JPH08331863A (en) * 1995-06-01 1996-12-13 Meidensha Corp Neutral point clamping inverter
JPH0937592A (en) * 1995-07-21 1997-02-07 Toyo Electric Mfg Co Ltd Pwm controller and control method for three level inverter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH077957A (en) * 1993-06-14 1995-01-10 Toshiba Corp Power converter
JPH08317663A (en) * 1995-05-15 1996-11-29 Toshiba Corp Control device for clamped-neutral type power converter
JPH08331863A (en) * 1995-06-01 1996-12-13 Meidensha Corp Neutral point clamping inverter
JPH0937592A (en) * 1995-07-21 1997-02-07 Toyo Electric Mfg Co Ltd Pwm controller and control method for three level inverter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100707081B1 (en) 2006-01-27 2007-04-13 엘에스산전 주식회사 Apparatus and method for controlling instantaneous current

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