GB568202A - Improvements in or relating to electric motor control systems - Google Patents

Improvements in or relating to electric motor control systems

Info

Publication number
GB568202A
GB568202A GB1297/41A GB129741A GB568202A GB 568202 A GB568202 A GB 568202A GB 1297/41 A GB1297/41 A GB 1297/41A GB 129741 A GB129741 A GB 129741A GB 568202 A GB568202 A GB 568202A
Authority
GB
United Kingdom
Prior art keywords
contacts
motor
speed
motors
controller
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
GB1297/41A
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.)
EDWARD HUGH CROFT
General Electric Co PLC
Original Assignee
EDWARD HUGH CROFT
General Electric Co PLC
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 EDWARD HUGH CROFT, General Electric Co PLC filed Critical EDWARD HUGH CROFT
Priority to GB1297/41A priority Critical patent/GB568202A/en
Publication of GB568202A publication Critical patent/GB568202A/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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/10—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current
    • B60L15/12—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current with circuits controlled by relays or contactors
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Centrifugal Separators (AREA)

Abstract

568,202. Control of D.C. motors. GENERAL ELECTRIC CO., Ltd., and CROFT, E. H. Jan. 31. 1941, No. 1297. [Class 38 (iii)] In the control of electric motors in which regenerative braking is eftected by backwards movement of the controller from a high-speed position, means in dependence on the motor speed (e.g. a centrifugal governor, or a relay and tachometer generator) are employed to effect a reduced excitation of the motor and prevent regeneration if after the controller has been moved to the " off " position it is again moved forward while the motor has sufficient speed to regenerate. The invention is applicable to compound motors and their equivalents, especially traction motors where the driver of a vehicle has to switch off for a gap in the conductor or rails. As shown, the shunt excitation is controlled by main and resistance-shorting contactors with coils 15a, 16a, 17a which are controlled by a relay 24, 25 with contacts 25 closed when the coil 24 is energized. At the first notch, the coil is energized and contacts 25 and auxiliary contacts 27 close. As the speed is notched up, the regenerative speed is reached, the centrifugal switch opens its contacts 28, but without effect, as they are shortcircuited by contacts 27. When, however, the controller is brought to zero positions and again moved forwards while speed. is such that regeneration could occur, the motor accelerates as a series motor, but as the contacts 27 open at the zero position and remain open and the contacts 28 are held open, the shunt field is not connected and the motor does not regenerate. The contacts 28 may be shunted. by a pushbutton switch to permit regeneration at any time. Specification 534,766 is referred to.
GB1297/41A 1941-01-31 1941-01-31 Improvements in or relating to electric motor control systems Expired GB568202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1297/41A GB568202A (en) 1941-01-31 1941-01-31 Improvements in or relating to electric motor control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1297/41A GB568202A (en) 1941-01-31 1941-01-31 Improvements in or relating to electric motor control systems

Publications (1)

Publication Number Publication Date
GB568202A true GB568202A (en) 1945-03-23

Family

ID=9719527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297/41A Expired GB568202A (en) 1941-01-31 1941-01-31 Improvements in or relating to electric motor control systems

Country Status (1)

Country Link
GB (1) GB568202A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108075693A (en) * 2018-01-04 2018-05-25 江苏华频电子科技有限公司 A kind of electrical motor gearshift switching circuit and its method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108075693A (en) * 2018-01-04 2018-05-25 江苏华频电子科技有限公司 A kind of electrical motor gearshift switching circuit and its method
CN108075693B (en) * 2018-01-04 2024-04-30 江苏华频电子科技有限公司 Motor speed change switching circuit and method thereof

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