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GB1513356A - Speed control system for induction motor - Google Patents

Speed control system for induction motor

Info

Publication number
GB1513356A
GB1513356A GB1800876A GB1800876A GB1513356A GB 1513356 A GB1513356 A GB 1513356A GB 1800876 A GB1800876 A GB 1800876A GB 1800876 A GB1800876 A GB 1800876A GB 1513356 A GB1513356 A GB 1513356A
Authority
GB
United Kingdom
Prior art keywords
non linear
linear circuit
induction motor
speed control
control system
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
GB1800876A
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to GB1800876A priority Critical patent/GB1513356A/en
Publication of GB1513356A publication Critical patent/GB1513356A/en
Priority to HK65583A priority patent/HK65583A/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
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude
    • H02P27/026—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Landscapes

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

Abstract

1513356 Automatic speed control MITSUBISHI DENKI KK 3 May 1976 18008/76 Heading G3R [Also in Division G4] In a rectroactive speed control system for a thyristor fed induction motor, a non linear circuit is included in the control loop, the circuit generating an output that is approximately the square root of its input. As shown, the output of motor driven tachometer 24 is compared at 26 with a command speed from generator 28. Any difference is amplified and passes through the non linear circuit 36 to control the firing angle of thyristors 20a, b, c feeding three phase induction motor 18 which drives an elevator 10. The non linear circuit which may include an operational amplifier with diode-resistor feedback [see Division G4] can alternatively be inserted between the comparator 26 and amplifier 30, between the tachometer 24 and comparator 26 or between phase shifters 32a, b, c and the thyristors. The non linear circuit is used so as to keep the control loop gain constant.
GB1800876A 1976-05-03 1976-05-03 Speed control system for induction motor Expired GB1513356A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1800876A GB1513356A (en) 1976-05-03 1976-05-03 Speed control system for induction motor
HK65583A HK65583A (en) 1976-05-03 1983-12-08 Speed control system for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1800876A GB1513356A (en) 1976-05-03 1976-05-03 Speed control system for induction motor

Publications (1)

Publication Number Publication Date
GB1513356A true GB1513356A (en) 1978-06-07

Family

ID=10105054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1800876A Expired GB1513356A (en) 1976-05-03 1976-05-03 Speed control system for induction motor

Country Status (2)

Country Link
GB (1) GB1513356A (en)
HK (1) HK65583A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0446957A2 (en) * 1990-03-16 1991-09-18 KONE Elevator GmbH Procedure for regulating the speed reference of a voltage controlled squirrel-cage motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0446957A2 (en) * 1990-03-16 1991-09-18 KONE Elevator GmbH Procedure for regulating the speed reference of a voltage controlled squirrel-cage motor
EP0446957A3 (en) * 1990-03-16 1992-12-30 Kone Elevator Gmbh Procedure for regulating the speed reference of a voltage controlled squirrel-cage motor

Also Published As

Publication number Publication date
HK65583A (en) 1983-12-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930503