GB2013429A - Control of asynchronous motors - Google Patents

Control of asynchronous motors

Info

Publication number
GB2013429A
GB2013429A GB7900246A GB7900246A GB2013429A GB 2013429 A GB2013429 A GB 2013429A GB 7900246 A GB7900246 A GB 7900246A GB 7900246 A GB7900246 A GB 7900246A GB 2013429 A GB2013429 A GB 2013429A
Authority
GB
United Kingdom
Prior art keywords
voltage
motor
pulses
frequency
members
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.)
Granted
Application number
GB7900246A
Other versions
GB2013429B (en
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB2013429A publication Critical patent/GB2013429A/en
Application granted granted Critical
Publication of GB2013429B publication Critical patent/GB2013429B/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
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
    • H02P2201/03—AC-DC converter stage controlled to provide a defined DC link voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Inverter Devices (AREA)

Abstract

An asynchronous motor 4 is supplied by a static frequency changer 1, 2, 3 whose inverter 3 is controlled, over an upper frequency range, by pulses derived from the motor voltage and, over a lower frequency range when a sufficiently high voltage is not available, by external pulses. The latter are derived from the desired value voltage of potentiometer 5 feeding voltage/frequency converter 18 controlling inverter 3 through one position of a changeover switch 22. Firing unit 12 controls the inverter through the other switch position in accordance with pulses derived by members 13-16. Controller 19 receives the pulse trains from members 12, 18 and controls unit 12 to reduce to a minimum the phase difference between the pulse trains. Stage 21 responds to this condition and to trigger stages 20, 23 operable when the motor voltage and frequency exceed preset values, to change over switch 22 and ensure smooth transition from external to motor pulsed operation. Signals from members 8, 17 are compared with the potentiometer voltage to produce control signals for controllers 6, 7, whose outputs are summed to determine the phase of pulses from firing unit 10 for rectifier 1 and from unit 12. Further control is provided by signals from current sensor 11 and optionally from torque controller 25 if the motor is operated at a constant voltage/frequency ratio. <IMAGE>
GB7900246A 1978-01-27 1979-01-04 Method of controlling an asynchronous machine fed via an intermediate circuit static frequency changer Expired GB2013429B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2804050A DE2804050C2 (en) 1978-01-27 1978-01-27 Arrangement for controlling and regulating an asynchronous machine fed by an intermediate circuit converter

Publications (2)

Publication Number Publication Date
GB2013429A true GB2013429A (en) 1979-08-08
GB2013429B GB2013429B (en) 1982-03-17

Family

ID=6030788

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7900246A Expired GB2013429B (en) 1978-01-27 1979-01-04 Method of controlling an asynchronous machine fed via an intermediate circuit static frequency changer

Country Status (7)

Country Link
AT (1) AT366215B (en)
CH (1) CH638350A5 (en)
DE (1) DE2804050C2 (en)
FR (1) FR2415908A1 (en)
GB (1) GB2013429B (en)
IT (1) IT1109786B (en)
SE (1) SE433154B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496895A1 (en) * 1980-12-18 1982-06-25 Loher Gmbh Peak clipping voltage measurer for async. motor control - uses peak clipping circuit with fast filter to measure inverter output and to increase dynamic control
EP0153751A2 (en) * 1984-03-02 1985-09-04 Kabushiki Kaisha Toshiba Power converter for AC load

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236640B (en) * 1961-08-08 1967-03-16 Vet Karl Franz Schinckel Dr Speed-controlled electromotive drive with a converter motor built like a synchronous motor
FR1423464A (en) * 1965-01-29 1966-01-03 Licentia Gmbh Circuitry for frequency control of a mutator
DE1588745C3 (en) * 1967-08-04 1973-09-27 Siemens Ag, 1000 Berlin U. 8000 Muenchen Method for operating a converter to control the speed and direction of rotation of an induction machine
JPS5231320A (en) * 1975-09-05 1977-03-09 Hitachi Ltd Driving appliance for inductin motor
FR2357100A1 (en) * 1976-07-02 1978-01-27 Alsthom Cgee Control of async. motor - uses thyristor rectifier bridge and thyristor oscillator receiving variable frequency three-phase supply

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496895A1 (en) * 1980-12-18 1982-06-25 Loher Gmbh Peak clipping voltage measurer for async. motor control - uses peak clipping circuit with fast filter to measure inverter output and to increase dynamic control
EP0153751A2 (en) * 1984-03-02 1985-09-04 Kabushiki Kaisha Toshiba Power converter for AC load
EP0153751A3 (en) * 1984-03-02 1986-07-30 Kabushiki Kaisha Toshiba Power converter for ac load

Also Published As

Publication number Publication date
FR2415908A1 (en) 1979-08-24
CH638350A5 (en) 1983-09-15
DE2804050C2 (en) 1982-09-09
IT1109786B (en) 1985-12-23
SE433154B (en) 1984-05-07
IT7919666A0 (en) 1979-01-26
GB2013429B (en) 1982-03-17
FR2415908B1 (en) 1983-03-18
SE7900168L (en) 1979-07-28
AT366215B (en) 1982-03-25
ATA33979A (en) 1981-07-15
DE2804050A1 (en) 1979-08-02

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee