GB1021088A - A driving system comprising an alternating current motor - Google Patents

A driving system comprising an alternating current motor

Info

Publication number
GB1021088A
GB1021088A GB4665362A GB4665362A GB1021088A GB 1021088 A GB1021088 A GB 1021088A GB 4665362 A GB4665362 A GB 4665362A GB 4665362 A GB4665362 A GB 4665362A GB 1021088 A GB1021088 A GB 1021088A
Authority
GB
United Kingdom
Prior art keywords
winding
braking
driving system
source
inverter
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
GB4665362A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of GB1021088A publication Critical patent/GB1021088A/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/02—Control systems without regulation, i.e. without retroactive action
    • B66B1/06—Control systems without regulation, i.e. without retroactive action electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B66C13/23—Circuits for controlling the lowering of the load
    • B66C13/26—Circuits for controlling the lowering of the load by ac motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/081—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists with ac motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

1,021,088. Control of A.C. motors. ALLMANNA SVENSKA ELEKTRISKE A.B. Dec. 11, 1962 [Dec. 11, 1961], No. 46653/62. Heading H2J. The driving system of an asynchronous motor comprises primary winding 5 supplied from network 9 through slip-rings 10, and secondary winding 4 associated with rectifier 1 and inverter 2 whereby power is fed back from the winding 4 to the network 9. Speed regulation is effected by means of the inverter 2. The motor also has a braking system comprising short-circuited rotor winding 6, and stator winding 8 which is supplied from variable voltage source 7 connected to network 11. The windings 6, 8 have a different pole-number from the windings 4, 5. When the inverter 2 is adjusted to reduce the speed of the motor, the secondary current falls to a low value whereby a control signal is applied to source 7 to render the braking system effective. The braking torque is reduced when the speed approaches the desired value by regulating source 7 in accordance with the secondary current or other speed-responsive factor. The winding 8 may be connected for providing a reverse torque, and a resistor may be connected in series with winding 6. Reversal of the winding 5 is prevented until braking has taken place. In another arrangement, the primary winding 12 of the driving system is placed on the stator and is formed as a double star-connected winding. The braking field is produced by controlled rectifier 15. Secondary winding 13 of the driving system has two parallel groups per phase to form a short-circuited winding for the braking system having a pole-number different from that of the driving system. The winding 13 is connected to frequency changer 14, Fig. 2 (not shown). In a further embodiment the motor has a squirrel-cage rotor 21, the stator winding having phase coils 20 supplied with direct-current from source 18 for braking. An inverter 19 is supplied from rectifier 17. Source 18 is controlled from rectifier 17 to provide braking current when the power of the driving system drops to a low value, Fig. 3 (not shown).
GB4665362A 1961-12-11 1962-12-11 A driving system comprising an alternating current motor Expired GB1021088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1234761 1961-12-11

Publications (1)

Publication Number Publication Date
GB1021088A true GB1021088A (en) 1966-02-23

Family

ID=20295589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4665362A Expired GB1021088A (en) 1961-12-11 1962-12-11 A driving system comprising an alternating current motor

Country Status (3)

Country Link
CH (1) CH409072A (en)
DE (1) DE1413659A1 (en)
GB (1) GB1021088A (en)

Also Published As

Publication number Publication date
DE1413659A1 (en) 1969-04-03
CH409072A (en) 1966-03-15

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