GB1532811A - Braking system for inverter-fed induction motors - Google Patents

Braking system for inverter-fed induction motors

Info

Publication number
GB1532811A
GB1532811A GB15224/75A GB1522475A GB1532811A GB 1532811 A GB1532811 A GB 1532811A GB 15224/75 A GB15224/75 A GB 15224/75A GB 1522475 A GB1522475 A GB 1522475A GB 1532811 A GB1532811 A GB 1532811A
Authority
GB
United Kingdom
Prior art keywords
inverter
braking
motor
load
motoring
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
GB15224/75A
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.)
British Railways Board
Original Assignee
British Railways Board
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 British Railways Board filed Critical British Railways Board
Priority to GB15224/75A priority Critical patent/GB1532811A/en
Priority to DE19762615781 priority patent/DE2615781A1/en
Priority to CH468876A priority patent/CH612804A5/en
Priority to SE7604329A priority patent/SE425882B/en
Priority to FR7610775A priority patent/FR2308239A1/en
Priority to JP51043040A priority patent/JPS51138817A/en
Priority to ZA762103A priority patent/ZA762103B/en
Publication of GB1532811A publication Critical patent/GB1532811A/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
    • B60L7/00—Electrodynamic brake systems for vehicles in general
    • B60L7/02—Dynamic electric resistor braking
    • B60L7/06—Dynamic electric resistor braking for vehicles propelled by ac motors
    • 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
    • H02P3/22—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by short-circuit or resistive braking
    • 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
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Abstract

1532811 Control cf AC motors BRITISH RAILWAYS BOARD 6 April 1976 [14 April 1975] 15224/75 Heading H2J A three phase induction motor 2, fed from an A.C. supply through a D.C. source 1, contactor 5 and inverter 3, is braked by reducing the output of source 1 to zero, opening contactor 5 to cause induction generator operation and closing a contactor 6 to connect the motor to a controlled power-absorbing, unity power factor load 7, whereby real power flows through the load 7 and reactive power through the inverter 3. Thus the inverter rating may be reduced compared with a braking arrangement using a load connected across the D.C. side of the inverter. The load may be a switched resistor chain, a rectifier followed by a controller (e.g. D.C. chopper) connected to a battery to be charged, or a system to feed power back to the A.C. supply. During braking the inverter frequency f is controlled by a feed-back loop 10 responsive to the voltage of the motor or of the D.C. side ofthe inverter to maintain a constant flux density in the motor for producing a desired braking torque, for example maximum torque. To prevent high voltages being applied to the inverter during braking, it is connected to tappings 17, 18, 19 on the motor windings as shown in Fig. 3, the winding terminals 14, 15, 16 being connected to a load in the form of a resistor bank 7 which is progressively reduced, as the motor speed and voltage fall, to maintain the braking torque constant. The tappings 17, 18, 19 may also be used during high speed motoring, the operation for motoring with full winding or tapped winding connections and for braking with trapped winding connections and a tapped, switched-segment resistor 7 being described, Figs. 4(a), (b) and (c) (not shown). Alternatively each winding may comprise two sections connected in series for low speed motoring and in parallel for high speed motoring and braking. Figs. 5(a), (b) and (c) (not shown). Another method is to connect the windings in star for low speed motoring and in mesh for high speed motoring and braking. The loop 10 may be adjusted to obtain a desired braking torque below maximum by varying the constant of proportionality K 1 in the equation f = K 1 V.
GB15224/75A 1976-04-06 1976-04-06 Braking system for inverter-fed induction motors Expired GB1532811A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB15224/75A GB1532811A (en) 1976-04-06 1976-04-06 Braking system for inverter-fed induction motors
DE19762615781 DE2615781A1 (en) 1976-04-06 1976-04-10 BRAKE SYSTEM FOR AC SYNCHRONOUS MOTORS
CH468876A CH612804A5 (en) 1976-04-06 1976-04-13 Circuit for controlling an induction motor powered via a converter
SE7604329A SE425882B (en) 1976-04-06 1976-04-13 BRAKE DEVICE FOR EXCHANGED ASYNCHRONIC ENGINE
FR7610775A FR2308239A1 (en) 1976-04-06 1976-04-13 BRAKING SYSTEM USING AN INDUCTION MOTOR POWERED BY A CONVERTER AND WHICH IS OPERATED LIKE AN ASYNCHRONOUS GENERATOR
JP51043040A JPS51138817A (en) 1976-04-06 1976-04-14 Inverter feeding induction motor brake unit
ZA762103A ZA762103B (en) 1976-04-06 1977-02-25 A braking system for inverter fedinduction motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15224/75A GB1532811A (en) 1976-04-06 1976-04-06 Braking system for inverter-fed induction motors

Publications (1)

Publication Number Publication Date
GB1532811A true GB1532811A (en) 1978-11-22

Family

ID=10055254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15224/75A Expired GB1532811A (en) 1976-04-06 1976-04-06 Braking system for inverter-fed induction motors

Country Status (7)

Country Link
JP (1) JPS51138817A (en)
CH (1) CH612804A5 (en)
DE (1) DE2615781A1 (en)
FR (1) FR2308239A1 (en)
GB (1) GB1532811A (en)
SE (1) SE425882B (en)
ZA (1) ZA762103B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1040562B1 (en) * 1997-12-18 2003-11-19 Elmotec Ag Electronic motor control comprising an electric brake apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656067A (en) * 1980-09-26 1981-05-16 Nec Corp Picture receiver of weather satellite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1040562B1 (en) * 1997-12-18 2003-11-19 Elmotec Ag Electronic motor control comprising an electric brake apparatus

Also Published As

Publication number Publication date
FR2308239B1 (en) 1981-09-25
JPS51138817A (en) 1976-11-30
FR2308239A1 (en) 1976-11-12
DE2615781A1 (en) 1976-10-28
SE7604329L (en) 1976-10-15
SE425882B (en) 1982-11-15
ZA762103B (en) 1977-04-27
CH612804A5 (en) 1979-08-15

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Legal Events

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