GB1490740A - Method for regulating the torque of an induction motor - Google Patents

Method for regulating the torque of an induction motor

Info

Publication number
GB1490740A
GB1490740A GB5287274A GB5287274A GB1490740A GB 1490740 A GB1490740 A GB 1490740A GB 5287274 A GB5287274 A GB 5287274A GB 5287274 A GB5287274 A GB 5287274A GB 1490740 A GB1490740 A GB 1490740A
Authority
GB
United Kingdom
Prior art keywords
signal
stator
frequency
torque
rotor
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
GB5287274A
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 Germany
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Germany
Publication of GB1490740A publication Critical patent/GB1490740A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B60L2220/12—Induction machines
    • 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
    • H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
    • H02P2207/01—Asynchronous machines
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

1490740 Control of A.C. motors BROWN BOVERI & CIE AG 6 Dec 1974 [8 Dec 1973] 52872/74 Heading H2J [Also in Division G3] An induction motor (not shown), which may be of the single or multi-phase and squirrel cage or wound rotor type and may be used in traction drives, is fed from a variable voltage and frequency static frequency changer or inverter (not shown), whose voltage and frequency are determined by signals U 1 and f 1 derived from a signal of desired torque Msoll by the circuit shown, which comprises a first branch 2, 3, 4 consisting of a function generator 2 receiving the signal Msoll from a device 1 (for example a motor speed controller providing a reference signal representing Msoll) and deriving therefrom a signal Isoll representing a desired value of stator current; a current regulator 3 which compares signal Isoll with a measured stator current Iist; and a computer 4 which multiplies the error signal from regulator 3 by a signal f 1 , representative of a required stator frequency, to produce the signal U 1 which is representative of a required stator voltage and is applied to control the frequency changer or inverter; and a second branch 5, 6, 7 consisting of a function generator 5 in which is stored a characteristic relating slip frequency f 2 to the maximum torque values of a family of functions relating torque and slip frequency for different stator currents and a predetermined constant temperature of the rotor, this characteristic enabling the generator 5 to produce from signal Msoll a signal f 2 soll of required slip frequency providing the greatest possible torque for a given stator current; a computer 6 which multiplies the signal f 2 soll by a signal # R proportional to the actual rotor temperature; and an adding means 7 which adds the temperature-corrected signal from member 6 to a signal f n ist proportional to the rotor speed (f n ist is equal to rotor speed (n) times number of motor pole pairs (p)), the output signal f 1 of adder 7 representing a required stator frequency and being applied to computer 4 and to control the frequency changer or inverter. Typical torque (M)/slip frequency (f 2 ) characteristics are given for various stator currents and cold and hot rotors, Fig. 1 (not shown), comparison being made between torques obtained by the known method of maintaining a constant stator flux and the higher torques obtained from the maximum points on the torque-slip frequency characteristics using the circuit shown. Temperature may be measured by a resistance thermometer on the rotor, on the stator near the air gap or on the stator with the temperature signal being corrected by thermalsimulation of the heat flow from the rotor to the stator.
GB5287274A 1973-12-08 1974-12-06 Method for regulating the torque of an induction motor Expired GB1490740A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2361339A DE2361339C3 (en) 1973-12-08 1973-12-08 Arrangement for controlling the torque of an asynchronous machine

Publications (1)

Publication Number Publication Date
GB1490740A true GB1490740A (en) 1977-11-02

Family

ID=5900319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5287274A Expired GB1490740A (en) 1973-12-08 1974-12-06 Method for regulating the torque of an induction motor

Country Status (6)

Country Link
AT (1) AT338940B (en)
CH (1) CH576208A5 (en)
DE (1) DE2361339C3 (en)
FR (1) FR2254147B1 (en)
GB (1) GB1490740A (en)
SE (1) SE407880B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0196846A1 (en) * 1985-03-21 1986-10-08 University Of Auckland Method and apparatus for controlling an electric A.C. motor
US5231339A (en) * 1990-03-16 1993-07-27 Hitachi, Ltd. Control device for induction motor
GB2286734B (en) * 1994-01-28 1997-12-10 Mitsubishi Electric Corp Inverter control method and apparatus

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2752600C2 (en) * 1977-11-25 1982-08-19 Brown, Boveri & Cie Ag, 6800 Mannheim Method and circuit arrangement for controlling a converter-fed asynchronous machine
JPS55117403A (en) * 1979-03-05 1980-09-09 Hitachi Ltd Controlling device vehicle driving induction motor
DE2952325C2 (en) * 1979-12-24 1986-11-27 Brown, Boveri & Cie Ag, 6800 Mannheim Method for controlling the torque and / or the speed of an asynchronous machine fed by a converter with impressed intermediate circuit current
JPS6036716B2 (en) * 1980-11-10 1985-08-22 富士電機株式会社 Magnetic flux vector calculator for induction motor
SU1054863A1 (en) * 1981-07-02 1983-11-15 Новосибирский Научно-Исследовательский,Проектно-Конструкторский И Технологический Институт Комплектного Электропривода Ac electric drive (its versions)
DE3245395A1 (en) * 1981-12-09 1983-10-20 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Method and device for reducing the power consumption of electrical drive systems
DE3211182C2 (en) * 1982-03-26 1986-06-26 Brown, Boveri & Cie Ag, 6800 Mannheim Method for regulating the torque of an asynchronous machine
FR2614481B1 (en) * 1987-02-13 1990-08-31 Pk I METHOD FOR CONTROLLING AN ASYNCHRONOUS MOTOR AND ELECTRIC DRIVE IMPLEMENTING THIS METHOD
DE3820125C2 (en) * 1987-06-12 1994-04-07 Hitachi Ltd Method for controlling an inverter-fed asynchronous motor
DE19720697A1 (en) * 1997-05-16 1998-11-19 Bosch Gmbh Robert Method for controlling an asynchronous machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1144835B (en) * 1962-05-19 1963-03-07 Bbc Brown Boveri & Cie Arrangement for monitoring the excitation winding heating of synchronous machines
DE1563228B2 (en) * 1966-07-05 1972-04-06 Licentia Patent Verwaltungs GmbH, 6000 Frankfurt METHOD OF CONTROLLING THE TORQUE DELIVERED BY AN ASYNCHRONOUS MACHINE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0196846A1 (en) * 1985-03-21 1986-10-08 University Of Auckland Method and apparatus for controlling an electric A.C. motor
US5231339A (en) * 1990-03-16 1993-07-27 Hitachi, Ltd. Control device for induction motor
GB2286734B (en) * 1994-01-28 1997-12-10 Mitsubishi Electric Corp Inverter control method and apparatus
US5744927A (en) * 1994-01-28 1998-04-28 Mitsubishi Denki Kabushiki Kaisha Inverter control method and apparatus

Also Published As

Publication number Publication date
SE407880B (en) 1979-04-23
DE2361339B2 (en) 1977-11-24
ATA960274A (en) 1977-01-15
CH576208A5 (en) 1976-05-31
SE7415241L (en) 1975-06-09
AT338940B (en) 1977-09-26
DE2361339C3 (en) 1985-05-30
DE2361339A1 (en) 1975-06-19
FR2254147A1 (en) 1975-07-04
FR2254147B1 (en) 1981-04-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee