SE333018B - - Google Patents
Info
- Publication number
- SE333018B SE333018B SE1264465A SE1264465A SE333018B SE 333018 B SE333018 B SE 333018B SE 1264465 A SE1264465 A SE 1264465A SE 1264465 A SE1264465 A SE 1264465A SE 333018 B SE333018 B SE 333018B
- Authority
- SE
- Sweden
- Prior art keywords
- daw
- circuit
- stepping
- phase
- converter
- 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
- H02M11/00—Power conversion systems not covered by the preceding groups
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
1,114,429. Inverting. SIEMENS-SCHUCKERTWERKE A.G. 30 Sept., 1965 [30 Sept., 1964], No. 41646/65. Heading H2F. An inverter comprises an analogue/digital converter ADW for converting a variable amplitude D.C. input signal into a pulse frequency modulated signal which controls the operation of stepping circuits. Outputs are taken from the stepping circuits to control digital/ analogue converter DAW which produce output sine waves having a frequency dependent on the amplitude of the applied D.C. input. The amplitude of the output is controlled by a unit AS. The units DAW, one per phase, comprise four converters, each converter being formed by a number of parallel connected resistors which may be selectively switched into circuit by associated static switches, Figs. 1, 2 (not shown). The sinusoidal output signal, Fig. 4, may be considered as consisting of four basic wave shapes and each converter is arranged to simulate one of these, the stepping circuit determining which is selected. For example, during time period I, phase R is a positive voltage with a positive slope A, phase T is the same voltage with a negative slope A, and phase S is the sum of A and A with a negative sign. Thus, each unit DAW is arranged to produce the four waveforms ŒA, Œ #A. During each time period I-VI stepping circuit I selects either A or A in each unit DAW and a reversible counter VG determines whether the waveform selected is positive or negative going. The counter VG is stepped forward or backwards by a further stepping circuit II under the control of a circuit DV in dependence on the required direction of rotation of the phases. In a modification, Fig. 8 (not shown), the units DAW synthesize the waveform from the portions a, - a, b, - b shown in Fig. 4, and the waveform is divided into twelve periods.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1964S0093550 DE1246105B (en) | 1964-09-30 | 1964-09-30 | Device for converting a direct voltage into single or multi-phase alternating voltages |
Publications (1)
Publication Number | Publication Date |
---|---|
SE333018B true SE333018B (en) | 1971-03-01 |
Family
ID=7518113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE1264465A SE333018B (en) | 1964-09-30 | 1965-09-29 |
Country Status (6)
Country | Link |
---|---|
AT (1) | AT253622B (en) |
BE (1) | BE670067A (en) |
DE (1) | DE1246105B (en) |
GB (1) | GB1114429A (en) |
NL (1) | NL150285B (en) |
SE (1) | SE333018B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6309758B1 (en) | 1999-05-06 | 2001-10-30 | W. R. Grace & Co.-Conn. | Promoted porous catalyst |
CN114336950A (en) * | 2022-01-06 | 2022-04-12 | 合肥联信电源有限公司 | Method for identifying phase sequence of three-phase static switch |
-
1964
- 1964-09-30 DE DE1964S0093550 patent/DE1246105B/en not_active Withdrawn
-
1965
- 1965-08-16 AT AT751965A patent/AT253622B/en active
- 1965-09-20 NL NL6512226A patent/NL150285B/en unknown
- 1965-09-24 BE BE670067D patent/BE670067A/xx unknown
- 1965-09-29 SE SE1264465A patent/SE333018B/xx unknown
- 1965-09-30 GB GB4164665A patent/GB1114429A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE670067A (en) | 1966-01-17 |
GB1114429A (en) | 1968-05-22 |
DE1246105B (en) | 1967-08-03 |
AT253622B (en) | 1967-04-10 |
NL6512226A (en) | 1966-03-31 |
NL150285B (en) | 1976-07-15 |
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