[go: up one dir, main page]

GB676132A - Variable speed power unit incorporating two a.c. motors - Google Patents

Variable speed power unit incorporating two a.c. motors

Info

Publication number
GB676132A
GB676132A GB333250A GB333250A GB676132A GB 676132 A GB676132 A GB 676132A GB 333250 A GB333250 A GB 333250A GB 333250 A GB333250 A GB 333250A GB 676132 A GB676132 A GB 676132A
Authority
GB
United Kingdom
Prior art keywords
motor
motors
power unit
variable speed
speed power
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
GB333250A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB333250A priority Critical patent/GB676132A/en
Publication of GB676132A publication Critical patent/GB676132A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/34—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter
    • H02K17/36—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with another asynchronous induction motor
    • 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
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors
    • H02P5/747—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more AC dynamo-electric motors mechanically coupled by gearing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

676,132. Control of two A.C. motors. NELSON, W. A. Feb. 9, 1951. [Feb. 9, 1950] No. 3332/50. Class 38 (iii). A slip-ring induction motor 1 is coupled to a second A.C. motor 3 which has at least one operating speed greater than that of the motor 1. A controller 6 may be set to apply alternating-current to the motor 1 and simultaneously to supply the motor 3 with directcurrent so that the second motor acts as a brake, the torque of which is variable according to the values of the applied voltage and rotor resistance, and creeping speeds are provided. For increased speed operation the motor 1 is operated from the A.C. supply in the usual manner, and, for speeds in excess of the operating speed of the motor 1, alternating-current is applied to the motor 3 and the motor 1 is switched off. The motor-shaft carries a pulley 5 and a brake 4 which becomes effective in the "off" position of the controller to prevent rotation of the motors by the load.
GB333250A 1950-02-09 1950-02-09 Variable speed power unit incorporating two a.c. motors Expired GB676132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB333250A GB676132A (en) 1950-02-09 1950-02-09 Variable speed power unit incorporating two a.c. motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB333250A GB676132A (en) 1950-02-09 1950-02-09 Variable speed power unit incorporating two a.c. motors

Publications (1)

Publication Number Publication Date
GB676132A true GB676132A (en) 1952-07-23

Family

ID=9756312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB333250A Expired GB676132A (en) 1950-02-09 1950-02-09 Variable speed power unit incorporating two a.c. motors

Country Status (1)

Country Link
GB (1) GB676132A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1220025B (en) * 1962-07-06 1966-06-30 Siemens Ag Brake circuit for three-phase asynchronous motors
US3319142A (en) * 1965-05-07 1967-05-09 Smith Corp A O Drive control including plural a.c. motors coupled to same shaft with d.c. braking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1220025B (en) * 1962-07-06 1966-06-30 Siemens Ag Brake circuit for three-phase asynchronous motors
US3319142A (en) * 1965-05-07 1967-05-09 Smith Corp A O Drive control including plural a.c. motors coupled to same shaft with d.c. braking

Similar Documents

Publication Publication Date Title
GB676132A (en) Variable speed power unit incorporating two a.c. motors
ES426704A1 (en) A VARIABLE SPEED ELECTRIC DRIVE APPARATUS CAPABLE OF REGENARATIVE BRAKING.
GB673908A (en) Controlling means for a.c. induction motors
GB319429A (en) Improvements in motor-generator control for electric winches and the like
SU118544A1 (en) Electric shaft hoist
GB634815A (en) Improvements relating to the dynamic braking of induction motors
GB186557A (en) Improvements in and relating to electric motor control systems
SU82940A1 (en) Cascade connection of two asynchronous machines
SU101304A1 (en) Method for determining the minimum starting torque of an asynchronous motor
SU44324A1 (en) Method of powering a three-phase asynchronous motor, which serves to drive the lifting mechanisms
GB724661A (en) Improvements in or relating to arrangements for the operation of three-phase motors with an auxiliary frequency lower than the normal operating frequency
GB643952A (en) Improvements in or relating to power transmission means comprising electric motors
US1394922A (en) Motor-control system
GB1008700A (en) Improved means for and method of controlling dynamo-electric machines
SU80719A1 (en) Adjustable electric drive
GB723319A (en) Improvements in or relating to electric motors
GB1013953A (en) Lowering speed control for a-c hoist
GB556637A (en) Improvements in or relating to the control of electric motors
GB700894A (en) Improvements relating to the control of low-speed induction motors
GB275961A (en) Electric motor particularly for dental purposes
GB625951A (en) Improvements in or relating to alternating current electric motor equipments
JPS6364599A (en) Load sharing controller for motor
GB427868A (en) Apparatus for actuating or controlling electrically operated machines
GB249118A (en) Improvements in and relating to variable frequency variable voltage converting apparatus
GB1010532A (en) Variable load driving installation, particularly for lifting apparatus