GB676132A - Variable speed power unit incorporating two a.c. motors - Google Patents
Variable speed power unit incorporating two a.c. motorsInfo
- 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
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.
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)
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 |
-
1950
- 1950-02-09 GB GB333250A patent/GB676132A/en not_active Expired
Cited By (2)
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 | |
ES8203784A1 (en) | Elevator system | |
ES426704A1 (en) | Braking circuit for alternating current induction motor | |
GB673908A (en) | Controlling means for a.c. 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 | |
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 | |
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 | |
GB275961A (en) | Electric motor particularly for dental purposes | |
GB353575A (en) | Improvements relating to electric cranes | |
GB625951A (en) | Improvements in or relating to alternating current electric motor equipments | |
GB427868A (en) | Apparatus for actuating or controlling electrically operated machines | |
GB632468A (en) | Improvements in or relating to single-phase induction motors | |
GB719652A (en) | Improvements in or relating to control arrangements for electric locomotives | |
ES228768A1 (en) | A drive system that comprises at least three-phase induction asynchronous drive motors with ringing rings (Machine-translation by Google Translate, not legally binding) | |
GB548718A (en) | Improvements connected with the control of reversible series a.c. commutator motors | |
JPS6364599A (en) | Load sharing controller for motor | |
GB529457A (en) | Improvements in and relating to electric crane, hoist and the like control systems | |
GB239158A (en) | An improved electric drive, more particularly for hoisting apparatus |