GB1170203A - Three Phase Frequency Changer Circuit. - Google Patents

Three Phase Frequency Changer Circuit.

Info

Publication number
GB1170203A
GB1170203A GB1903768A GB1903768A GB1170203A GB 1170203 A GB1170203 A GB 1170203A GB 1903768 A GB1903768 A GB 1903768A GB 1903768 A GB1903768 A GB 1903768A GB 1170203 A GB1170203 A GB 1170203A
Authority
GB
United Kingdom
Prior art keywords
frequency
phase
motor
pulse
control
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
GB1903768A
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
Brown Boveri und Cie AG Switzerland
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 AG Switzerland, Brown Boveri und Cie AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of GB1170203A publication Critical patent/GB1170203A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/24—Controlling the direction, e.g. clockwise or counterclockwise
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

1,170,203. Control of A.C. motors; converting circuits. BROWN, BOVERI & CO. Ltd. 23 April, 1968 [25 April, 1967], No. 19037/68. Headings H2F and H2J. A three-phase motor 4 is supplied from a . frequency charger circuit comprising a diode bridge 5, 6, 7, for each phase, and a controlled rectifier 8, 9, 10, shunted across each of the bridges. A supply transformer has secondary windings 1, 2, 3 connected in a cyclic manner to the motor phase windings U, V, W, and the controlled rectifiers are triggered by two pulse trains which have the same frequency but are mutually phase-displaced. The frequency applied to the motor is the difference between the supply frequency and the firing pulse frequency, the direction of rotation being dependant upon which is the greater. If the two frequencies are equal, unidirectional voltage is applied to the motor. The magnitude of the motor voltage is a function of the phase displacement angle. The firing pulses are derived from a generator having a frequency six times the control frequency, the generator being connected to a divider having two outputs in opposite sense and whose frequency is three times the control frequency. The outputs from the divider are applied to an OR gate, one through a pulse shaper, and the other through a pulse shaper and a time delay device. The output from the OR gate is applied to a three-stage ring counter which distributes the triggering pulses to the controlled rectifiers 8, 9, 10, Fig. 3 (not shown); In a modification, the supply transformer has six secondary windings and diode circuits for each phase, Fig. 4 (not shown).
GB1903768A 1967-04-25 1968-04-23 Three Phase Frequency Changer Circuit. Expired GB1170203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH590367A CH476419A (en) 1967-04-25 1967-04-25 Three-phase converter system for supplying a three-phase motor

Publications (1)

Publication Number Publication Date
GB1170203A true GB1170203A (en) 1969-11-12

Family

ID=4301272

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1903768A Expired GB1170203A (en) 1967-04-25 1968-04-23 Three Phase Frequency Changer Circuit.

Country Status (9)

Country Link
AT (1) AT274154B (en)
CH (1) CH476419A (en)
DE (1) DE1613526B2 (en)
DK (1) DK122919B (en)
FR (1) FR1560889A (en)
GB (1) GB1170203A (en)
NL (2) NL6805754A (en)
NO (1) NO119879B (en)
SE (1) SE344263B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3061959B1 (en) 2017-01-19 2019-05-31 Horiba Abx Sas BIOLOGICAL ANALYSIS SYSTEM

Also Published As

Publication number Publication date
NL6805754A (en) 1968-10-28
SE344263B (en) 1972-04-04
AT274154B (en) 1969-09-10
FR1560889A (en) 1969-03-21
DK122919B (en) 1972-04-24
CH476419A (en) 1969-07-31
NO119879B (en) 1970-07-20
DE1613526A1 (en) 1970-03-05
DE1613526B2 (en) 1971-01-07
NL134808C (en) 1900-01-01

Similar Documents

Publication Publication Date Title
GB998912A (en) Speed control of a polyphase electric motor
GB1108571A (en) Inverter systems
US4017744A (en) Digital firing pulse generator for thyristor power converters
GB1217641A (en) Output-transformerless static inverter
US3222587A (en) Alternating current converting circuit
GB1352881A (en) Cycloconverters
GB1214800A (en) A circuit for producing a pulse train of variable phase angle synchronous with an a.c. signal
GB1431832A (en) Converter apparatus
US3649902A (en) Dc to ac inverter for producing a sine-wave output by pulse width modulation
GB1171953A (en) Improvements in Static Invertor Control Circuits
GB1151457A (en) Safety Device for Inverters Supplying Asynchronous Motors
SE7601371L (en) DEVICE FOR AN EXCHANGE-FEEDED THREE PHASE MACHINE
GB1170203A (en) Three Phase Frequency Changer Circuit.
GB946556A (en) Controlled frequency power supply system
GB952626A (en) A frequency control system
US4864487A (en) Control for three terminal power semiconductor devices
US3864612A (en) Firing angle retardation control
GB1451223A (en) Elecrrical converter apparatus with an integrating type control means for determining firing points and an end-stop firing pulse control means
GB1309641A (en) Cycloconverters
GB1395743A (en) Conversion systems
GB1190847A (en) Electric Inverting Apparatus
US3792339A (en) Control device for an inverted converter
US3634748A (en) Static inverter circuits
GB1363036A (en) Changing the frequency of a polyphase alternating current supply and apparatus therefor
GB1192153A (en) Three-phase Frequency Changer Circuit