IT968502B - Variazione della frequenza di una alimentazione di corrente alterna ta polifase e apparecchio per la sua realizzazione - Google Patents
Variazione della frequenza di una alimentazione di corrente alterna ta polifase e apparecchio per la sua realizzazioneInfo
- Publication number
- IT968502B IT968502B IT29939/72A IT2993972A IT968502B IT 968502 B IT968502 B IT 968502B IT 29939/72 A IT29939/72 A IT 29939/72A IT 2993972 A IT2993972 A IT 2993972A IT 968502 B IT968502 B IT 968502B
- Authority
- IT
- Italy
- Prior art keywords
- polyphase
- realization
- variation
- frequency
- equipment
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/27—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 for conversion of frequency
- H02M5/271—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 for conversion of frequency from a three phase input voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
- Control Of Ac Motors In General (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA716729A ZA716729B (en) | 1971-10-07 | 1971-10-07 | Changing the frequency of a polyphase alternating current supply and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT968502B true IT968502B (it) | 1974-03-20 |
Family
ID=25564000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT29939/72A IT968502B (it) | 1971-10-07 | 1972-09-30 | Variazione della frequenza di una alimentazione di corrente alterna ta polifase e apparecchio per la sua realizzazione |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3816808A (it) |
| JP (1) | JPS4947846A (it) |
| AU (1) | AU4692972A (it) |
| DE (1) | DE2247427A1 (it) |
| GB (1) | GB1363036A (it) |
| IT (1) | IT968502B (it) |
| ZA (1) | ZA716729B (it) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3946293A (en) * | 1974-09-13 | 1976-03-23 | Conco Inc. | Thyristor control system |
| US4078192A (en) * | 1976-06-24 | 1978-03-07 | Pertec Computer Corporation | Synthesizer for multiphase waveforms |
| FR2449360A1 (fr) * | 1979-02-13 | 1980-09-12 | Telemecanique Electrique | Dispositif de commande d'un montage triphase a thyristors |
| US4468725A (en) * | 1982-06-18 | 1984-08-28 | Texas Instruments Incorporated | Direct AC converter for converting a balanced AC polyphase input to an output voltage |
| US4713744A (en) * | 1986-10-28 | 1987-12-15 | Torcon Products, Inc. | Fractional frequency converter using zero switching of input frequency halfwaves |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270136A (en) * | 1968-08-15 | 1972-04-12 | Nicholas Charl De Villiers | Polyphase alternating current frequency changer |
| GB1309641A (en) * | 1969-10-24 | 1973-03-14 | Secr Defence | Cycloconverters |
| US3703672A (en) * | 1970-05-05 | 1972-11-21 | Nat Res Dev | Three-phase induction-motor, speed-changing method and control circuit |
| US3686558A (en) * | 1971-01-04 | 1972-08-22 | Ajax Magnethermic Corp | Control for frequency converters |
-
1971
- 1971-10-07 ZA ZA716729A patent/ZA716729B/xx unknown
-
1972
- 1972-09-20 GB GB4354072A patent/GB1363036A/en not_active Expired
- 1972-09-20 US US00290470A patent/US3816808A/en not_active Expired - Lifetime
- 1972-09-21 AU AU46929/72A patent/AU4692972A/en not_active Expired
- 1972-09-27 DE DE19722247427 patent/DE2247427A1/de active Pending
- 1972-09-30 IT IT29939/72A patent/IT968502B/it active
- 1972-10-04 JP JP47099105A patent/JPS4947846A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2247427A1 (de) | 1973-04-12 |
| US3816808A (en) | 1974-06-11 |
| JPS4947846A (it) | 1974-05-09 |
| ZA716729B (en) | 1973-02-28 |
| GB1363036A (en) | 1974-08-14 |
| AU4692972A (en) | 1974-03-28 |
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