SE8000048L - PROCEDURE FOR CONTROLING A SELF-CONTROLLED EXCHANGER WITH VARIABLE BASIC FREQUENCY - Google Patents
PROCEDURE FOR CONTROLING A SELF-CONTROLLED EXCHANGER WITH VARIABLE BASIC FREQUENCYInfo
- 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
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>
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58179176A (en) * | 1982-04-13 | 1983-10-20 | Mitsubishi Electric Corp | Inverter |
Family Cites Families (6)
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 |
-
1979
- 1979-01-03 CH CH1179A patent/CH653824A5/en not_active IP Right Cessation
- 1979-01-31 DE DE19792903575 patent/DE2903575A1/en active Granted
- 1979-02-05 FR FR7902953A patent/FR2446031A1/en active Granted
- 1979-12-10 AT AT778779A patent/AT371959B/en not_active IP Right Cessation
-
1980
- 1980-01-03 SE SE8000048A patent/SE451355B/en not_active IP Right Cessation
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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