GB1365485A - Method and apparatus for controlling the operation of a threephase dynamo electric machine - Google Patents

Method and apparatus for controlling the operation of a threephase dynamo electric machine

Info

Publication number
GB1365485A
GB1365485A GB1554171A GB1554171A GB1365485A GB 1365485 A GB1365485 A GB 1365485A GB 1554171 A GB1554171 A GB 1554171A GB 1554171 A GB1554171 A GB 1554171A GB 1365485 A GB1365485 A GB 1365485A
Authority
GB
United Kingdom
Prior art keywords
switch
machine
closes
electric machine
siren
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
GB1554171A
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.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents Ltd
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 Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to GB1554171A priority Critical patent/GB1365485A/en
Publication of GB1365485A publication Critical patent/GB1365485A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result

Landscapes

  • Control Of Multiple Motors (AREA)

Abstract

1365485 Control of AC motors COAL INDUSTRY (PATENTS) Ltd 5 May 1972 [18 May 1971] 15541/71 Heading H2J To ensure that a warning is given when a three-phase dynamo-electric machine having windings 1 is to be started, the machine is initially partially energized, current flowing only in lines 2 and 4. The current in line 4 passes through a timing device 8, which closes switch 9 after a predetermined period, and a warning device 7, e.g. a siren, satisfactory operation of which closes a switch 10. Switch 10 is operated centrifugally or alternatively by air pressure or suction. The closure of both switches 9 and 10 energizes a coil 11 which closes switches 5, 13 and 6, and the machine is fully energized on all phases. The closure of switch 6 short circuits the timer 8 and siren 7 which are rendered inoperative. The warning device may alternatively or additionally comprise a light. The machine may be in a coal mine, operated from a remote position.
GB1554171A 1972-05-05 1972-05-05 Method and apparatus for controlling the operation of a threephase dynamo electric machine Expired GB1365485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1554171A GB1365485A (en) 1972-05-05 1972-05-05 Method and apparatus for controlling the operation of a threephase dynamo electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1554171A GB1365485A (en) 1972-05-05 1972-05-05 Method and apparatus for controlling the operation of a threephase dynamo electric machine

Publications (1)

Publication Number Publication Date
GB1365485A true GB1365485A (en) 1974-09-04

Family

ID=10060961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1554171A Expired GB1365485A (en) 1972-05-05 1972-05-05 Method and apparatus for controlling the operation of a threephase dynamo electric machine

Country Status (1)

Country Link
GB (1) GB1365485A (en)

Similar Documents

Publication Publication Date Title
GB1426594A (en) Brushless synchronous motor
GB1365485A (en) Method and apparatus for controlling the operation of a threephase dynamo electric machine
ES384183A1 (en) Control circuit for driving, stopping and restarting a variable speed single-phase induction motor
US3515970A (en) Motor control system using current diverter
GB1353652A (en) Method and apparatus for controlling the operation of a three- phase dynamo electric machine
GB1232615A (en)
GB1226483A (en)
US2308304A (en) Rotor protective system
GB1276843A (en) Improvements in or relating to uprintin machines
GB1005349A (en) Dynamic braking apparatus for an induction motor
GB1321608A (en) Synchronous motor systems
CA1278334C (en) Device for the controllable operation of out-of-balance drives with three-phase motors
US2278573A (en) Signal system for single-phase motors
US1918960A (en) Timing device for laundry extractors
US1773712A (en) Apparatus for controlling electric motors
GB1273720A (en) Electrical tool
GB1060743A (en) Electric motor
US2805348A (en) Dual automatic phasing control for synchronous motors
JPS5346625A (en) Deceleration control system for three-phase induction motor
US1895931A (en) Synchronous motor control system
US2393949A (en) Control system
US1683210A (en) Motor-control apparatus
JPS56126696A (en) Electric blower driving method
US1766533A (en) Regenerative braking system for single-phase electric-railway locomotives
GB295636A (en) Improvements in and relating to automatic control equipments for electric motors

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees