GB1216978A - Elevator motor control - Google Patents

Elevator motor control

Info

Publication number
GB1216978A
GB1216978A GB03630/69A GB1363069A GB1216978A GB 1216978 A GB1216978 A GB 1216978A GB 03630/69 A GB03630/69 A GB 03630/69A GB 1363069 A GB1363069 A GB 1363069A GB 1216978 A GB1216978 A GB 1216978A
Authority
GB
United Kingdom
Prior art keywords
contacts
energized
impulses
scr2
scr1
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
GB03630/69A
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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 Otis Elevator Co filed Critical Otis Elevator Co
Publication of GB1216978A publication Critical patent/GB1216978A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Direct Current Motors (AREA)
  • Relay Circuits (AREA)

Abstract

1,216,978. Semi-conductor pulse and switching circuits. OTIS ELEVATOR CO. 14 March, 1969 [1 April, 1968], No. 13630/69. Heading H3T. [Also in Division H2] In a Ward-Leonard control system for a lift, resistors in series with the generator field are sequentially short circuited for acceleration by contactors having coils 1E . . . 4E which are energized in turn by electronic switching means responsive to repetitive impulses. The impulses are produced by a relaxation oscillator across a Zener diode Z 1 and comprising a unijunction transistor T1, capacitor C1 and resistors R2, S and 1EP; the latter may be short circuited by contacts 1E4 closed by the first contactor 1E so that subsequent ones are energized at shorter intervals. The "electronic switching means" comprises a pair of thyristors SCR1, SCR2 in a multivibrator circuit and connected through diodes D4 ... D7 to odd and even numbered contactor coils respectively. The impulses are applied to the triggers of SCR1 and SCR2 via diodes D1 and D2 respectively; the first pulse is passed by D1 because D2 is back biased by the potential on a capacitor C2, but when SCR1 conducts this potential is lowered so that the next pulse is passed by D2 to trigger SCR2. Conduction of either thyristor switches the other one off by commutating capacitor C3. The contactors have "hold-on" contacts 1E1 ... 4E1, interlock contacts 1E2 ... 3E2 and are sequentially de-energized by mechanically operated contacts SLS1 ... SLS4.
GB03630/69A 1968-04-01 1969-03-14 Elevator motor control Expired GB1216978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71772368A 1968-04-01 1968-04-01

Publications (1)

Publication Number Publication Date
GB1216978A true GB1216978A (en) 1970-12-23

Family

ID=24883200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB03630/69A Expired GB1216978A (en) 1968-04-01 1969-03-14 Elevator motor control

Country Status (6)

Country Link
US (1) US3536969A (en)
CA (1) CA930084A (en)
CH (1) CH491039A (en)
DE (1) DE1916061A1 (en)
FR (1) FR2005317A1 (en)
GB (1) GB1216978A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688874A (en) * 1971-08-09 1972-09-05 Otis Elevator Co Elevator motor control system employing power amplifier with output current limiting arrangement
FR2666574B1 (en) * 1990-09-10 1993-09-10 Pascal Alain RETARDER DEVICE FOR SINGLE-SPEED ELEVATORS OPERATING WITH AN ELECTRIC DRIVE MOTOR.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231809A (en) * 1961-12-01 1966-01-25 Galion Jeffrey Mfg Co Motor acceleration control with controlled rectifier circuit
US3250972A (en) * 1962-12-05 1966-05-10 Staley Elevator Company Inc Elevator control for a generator-fed motor control system
US3341759A (en) * 1963-12-05 1967-09-12 Tokyo Shibaura Electric Co Control device for electric cars including scr short circuiting of a starting resistance
US3390318A (en) * 1965-07-06 1968-06-25 Raymond Corp Acceleration control device for an electric motor including a unijunction transistorand a controlled rectifier

Also Published As

Publication number Publication date
CA930084A (en) 1973-07-10
DE1916061A1 (en) 1969-10-23
CH491039A (en) 1970-05-31
US3536969A (en) 1970-10-27
FR2005317A1 (en) 1969-12-12

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