SE8000048L - PROCEDURE FOR CONTROLING A SELF-CONTROLLED EXCHANGER WITH VARIABLE BASIC FREQUENCY - Google Patents

PROCEDURE FOR CONTROLING A SELF-CONTROLLED EXCHANGER WITH VARIABLE BASIC FREQUENCY

Info

Publication number
SE8000048L
SE8000048L SE8000048A SE8000048A SE8000048L SE 8000048 L SE8000048 L SE 8000048L SE 8000048 A SE8000048 A SE 8000048A SE 8000048 A SE8000048 A SE 8000048A SE 8000048 L SE8000048 L SE 8000048L
Authority
SE
Sweden
Prior art keywords
alpha
fundamental
self
commutations
controling
Prior art date
Application number
SE8000048A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE451355B (en
Inventor
R Menzies
T Seger
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Publication of SE8000048L publication Critical patent/SE8000048L/en
Publication of SE451355B publication Critical patent/SE451355B/en

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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal 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
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal 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 using semiconductor devices only
    • H02M7/525—Conversion of dc power input into ac power output without possibility of reversal 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 using semiconductor devices only with automatic control of output waveform or frequency
    • H02M7/527—Conversion of dc power input into ac power output without possibility of reversal 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 using semiconductor devices only with automatic control of output waveform or frequency by pulse width modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

A self-commutated invertor is driven at the fundamental frequency, this frequency being variable and it being possible to use it, for example, to control the rotation speed of a motor. In this case, the harmonic content at specific phase angles ( alpha 1, alpha 2, alpha 3, alpha 4) can be reduced by means of additional commutations, but a minimum time interval ( tau t), which corresponds to an interval angle ( DELTA alpha ) which is proportional to the fundamental (f1) must in this case be maintained between successive commutations. The object is to create a control method which is suitable for suppressing harmonics over wide fundamental ranges. The solution provides an automatic changeover in the number of additional commutations (M = 1, 2, 3 ...) as a function of at least one limiting value of the control fundamental (f1) in the opposite sense to the change in said fundamental. <IMAGE>
SE8000048A 1979-01-03 1980-01-03 PROCEDURE AND DEVICE FOR REDUCING THE OVERTON CONTENT WHEN CONTROLING A SELF-CONTROLLED CONVERTER SE451355B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1179A CH653824A5 (en) 1979-01-03 1979-01-03 Method and control device for controlling a self-commutated invertor having a variable fundamental frequency

Publications (2)

Publication Number Publication Date
SE8000048L true SE8000048L (en) 1980-07-04
SE451355B SE451355B (en) 1987-09-28

Family

ID=4177381

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8000048A SE451355B (en) 1979-01-03 1980-01-03 PROCEDURE AND DEVICE FOR REDUCING THE OVERTON CONTENT WHEN CONTROLING A SELF-CONTROLLED CONVERTER

Country Status (5)

Country Link
AT (1) AT371959B (en)
CH (1) CH653824A5 (en)
DE (1) DE2903575A1 (en)
FR (1) FR2446031A1 (en)
SE (1) SE451355B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58179176A (en) * 1982-04-13 1983-10-20 Mitsubishi Electric Corp Inverter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1638608C3 (en) * 1967-09-22 1973-12-06 Siemens Ag, 1000 Berlin U. 8000 Muenchen Method of operating a stream night
US3638095A (en) * 1969-07-14 1972-01-25 Stuart P Jackson Standby power circuit utilizing multiple pulse modulation for converting dc to ac electric power
US3662247A (en) * 1970-10-01 1972-05-09 Reliance Electric Co Pulse width modulated inverter adaptive logic
DE2216412B2 (en) * 1972-04-05 1979-09-20 Reliance Electric Co., Cleveland, Ohio (V.St.A.) Control circuit for static inverter - uses carrier wave generator to fix thyristor trigger points to produce pulse-width modulated output
JPS5341331B2 (en) * 1973-12-18 1978-11-02
US4047083A (en) * 1976-03-08 1977-09-06 General Electric Company Adjustable speed A-C motor drive with smooth transition between operational modes and with reduced harmonic distortion

Also Published As

Publication number Publication date
FR2446031A1 (en) 1980-08-01
FR2446031B1 (en) 1984-03-23
SE451355B (en) 1987-09-28
DE2903575A1 (en) 1980-07-17
ATA778779A (en) 1982-12-15
DE2903575C2 (en) 1988-09-15
AT371959B (en) 1983-08-25
CH653824A5 (en) 1986-01-15

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