GB1431930A - Closed loop control device - Google Patents

Closed loop control device

Info

Publication number
GB1431930A
GB1431930A GB2609073A GB2609073A GB1431930A GB 1431930 A GB1431930 A GB 1431930A GB 2609073 A GB2609073 A GB 2609073A GB 2609073 A GB2609073 A GB 2609073A GB 1431930 A GB1431930 A GB 1431930A
Authority
GB
United Kingdom
Prior art keywords
controller
current
logic circuit
signal
firing
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
GB2609073A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
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 BBC Brown Boveri AG Switzerland, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Publication of GB1431930A publication Critical patent/GB1431930A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/75—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/757—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Electrical Variables (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

1431930 Automatic current control BBC BROWN BOVERI & CO Ltd 31 May 1973 [31 May 1972] 26090/73 Heading G3R A reversing converter is regulated by a closed loop system including a controller switchable between proportional-integral and integral action, and a device for storing the value of the controller output signal when the load current is reduced during current direction changing. As shown, load current supplied by one or other of two anti-parallel converter groups 6, 7 is sensed by a measuring transformer 8 which supplies a corresponding signal to a comparator 9 and to a logic circuit 1. A desired current indicating signal is also supplied to the circuits 1, 9. The output from comparator 9 passes through a storage device 20, controller 21, reversing unit 3, firing pulse unit 40, 41 and selective switches connected to the firing circuits of the converter groups 6, 7. When the desired current signal is reversed, a zero current interval occurs, during which the logic circuit 1 switches the controller to integral action only and causes the device 20 to store its instantaneous output value. Units 3, 40 and the firing circuit switches are also controlled by signals from the logic circuit 1. During the zero current interval, the controller output voltage may be shifted by a small amount to improve drive operation by the application of a constant voltage to the controller 21.
GB2609073A 1972-05-31 1973-05-31 Closed loop control device Expired GB1431930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722226527 DE2226527B2 (en) 1972-05-31 1972-05-31 Control device for a reversing converter without circular current

Publications (1)

Publication Number Publication Date
GB1431930A true GB1431930A (en) 1976-04-14

Family

ID=5846458

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2609073A Expired GB1431930A (en) 1972-05-31 1973-05-31 Closed loop control device

Country Status (7)

Country Link
JP (1) JPS4961624A (en)
AT (1) AT325157B (en)
CH (1) CH553509A (en)
DE (1) DE2226527B2 (en)
FR (1) FR2186775A1 (en)
GB (1) GB1431930A (en)
SE (1) SE386030B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012539A1 (en) * 1978-11-27 1980-06-25 Fanuc Ltd. A driving circuit for permanent magnet type DC motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012539A1 (en) * 1978-11-27 1980-06-25 Fanuc Ltd. A driving circuit for permanent magnet type DC motor

Also Published As

Publication number Publication date
JPS4961624A (en) 1974-06-14
DE2226527A1 (en) 1973-12-13
DE2226527B2 (en) 1978-11-23
FR2186775A1 (en) 1974-01-11
AT325157B (en) 1975-10-10
SE386030B (en) 1976-07-26
CH553509A (en) 1974-08-30

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Legal Events

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