AU4692972A - Method and apparatus for changing the frequency of an a.c. supply - Google Patents

Method and apparatus for changing the frequency of an a.c. supply

Info

Publication number
AU4692972A
AU4692972A AU46929/72A AU4692972A AU4692972A AU 4692972 A AU4692972 A AU 4692972A AU 46929/72 A AU46929/72 A AU 46929/72A AU 4692972 A AU4692972 A AU 4692972A AU 4692972 A AU4692972 A AU 4692972A
Authority
AU
Australia
Prior art keywords
changing
frequency
supply
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
AU46929/72A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TIME MODULATION Pty Ltd
Original Assignee
TIME MODULATION Pty Ltd
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 TIME MODULATION Pty Ltd filed Critical TIME MODULATION Pty Ltd
Publication of AU4692972A publication Critical patent/AU4692972A/en
Expired legal-status Critical Current

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)
AU46929/72A 1971-10-07 1972-09-21 Method and apparatus for changing the frequency of an a.c. supply Expired AU4692972A (en)

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
AU4692972A true AU4692972A (en) 1974-03-28

Family

ID=25564000

Family Applications (1)

Application Number Title Priority Date Filing Date
AU46929/72A Expired AU4692972A (en) 1971-10-07 1972-09-21 Method and apparatus for changing the frequency of an a.c. supply

Country Status (7)

Country Link
US (1) US3816808A (en)
JP (1) JPS4947846A (en)
AU (1) AU4692972A (en)
DE (1) DE2247427A1 (en)
GB (1) GB1363036A (en)
IT (1) IT968502B (en)
ZA (1) ZA716729B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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 (en) * 1979-02-13 1980-09-12 Telemecanique Electrique THYRISTOR THREE-PHASE MOUNTING CONTROL DEVICE
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
GB1363036A (en) 1974-08-14
DE2247427A1 (en) 1973-04-12
US3816808A (en) 1974-06-11
JPS4947846A (en) 1974-05-09
IT968502B (en) 1974-03-20
ZA716729B (en) 1973-02-28

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