GB1480437A - Adaptive current regulator - Google Patents

Adaptive current regulator

Info

Publication number
GB1480437A
GB1480437A GB4940/75A GB494075A GB1480437A GB 1480437 A GB1480437 A GB 1480437A GB 4940/75 A GB4940/75 A GB 4940/75A GB 494075 A GB494075 A GB 494075A GB 1480437 A GB1480437 A GB 1480437A
Authority
GB
United Kingdom
Prior art keywords
current
feedback
transistor
interrupted
continuous
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
GB4940/75A
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 GB1480437A publication Critical patent/GB1480437A/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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without 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
    • H02M7/155—Conversion of ac power input into dc power output without 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
    • H02M7/1555—Conversion of ac power input into dc power output without 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 with control circuit
    • H02M7/1557—Conversion of ac power input into dc power output without 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 with control circuit with automatic control of the output voltage or current
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Dc-Dc Converters (AREA)
  • Feedback Control In General (AREA)

Abstract

1480437 Automatic current control BBC BROWN BOVERI & CO Ltd 5 Feb 1975 [7 Feb 1974] 4940/75 Heading G3R A closed loop current regulator, using a converter which may deliver continuous or interrupted current, includes an amplifier with RC feedback. The changeover from continuous to interrupted current is detected, and causes the integral component of amplification to be increased while the proportional component is unchanged. As shown in Fig. 4, a variable gain amplifier 201 has actual and desired value inputs 206, 207 and an RC feedback path 204, 205. During continuous current operation, a field effect transistor 202 is held non-conductive. A zero current indicator circuit 216 detects interrupted current operation, and responds by turning on the transistor switch 202, thereby connecting the feedback capacitor 204 to earth through a resistor 213 and effectively reducing the capacitance in the feedback loop. A further circuit including a transistor 225 and capacitor 226 operates to maintain drive current to the transistor 202 between intervals in the converter current.
GB4940/75A 1974-02-07 1975-02-05 Adaptive current regulator Expired GB1480437A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2405750A DE2405750C3 (en) 1974-02-07 1974-02-07 Adaptive current regulator

Publications (1)

Publication Number Publication Date
GB1480437A true GB1480437A (en) 1977-07-20

Family

ID=5906806

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4940/75A Expired GB1480437A (en) 1974-02-07 1975-02-05 Adaptive current regulator

Country Status (8)

Country Link
AT (1) AT339431B (en)
CH (1) CH574131A5 (en)
DE (1) DE2405750C3 (en)
FR (1) FR2260825B3 (en)
GB (1) GB1480437A (en)
IT (1) IT1031463B (en)
NL (1) NL7501347A (en)
SE (1) SE405290B (en)

Also Published As

Publication number Publication date
NL7501347A (en) 1975-08-11
DE2405750C3 (en) 1979-07-19
IT1031463B (en) 1979-04-30
SE7501281L (en) 1975-08-08
DE2405750A1 (en) 1975-08-21
AT339431B (en) 1977-10-25
ATA86275A (en) 1977-02-15
DE2405750B2 (en) 1978-11-23
FR2260825B3 (en) 1977-10-21
CH574131A5 (en) 1976-03-31
SE405290B (en) 1978-11-27
FR2260825A1 (en) 1975-09-05

Similar Documents

Publication Publication Date Title
MX9504418A (en) Automatic tuning of a position control circuit for a servo device.
GB1252536A (en)
GB853340A (en) Electric control device for the control of electric voltage or current
GB1457635A (en) Sensitive pulse threshold detector
ES8206116A1 (en) Variable load impedance gain-controlled amplifier
GB1340135A (en) Variable gain circuits ztilizing a field effect transistor
GB1017759A (en) Improvements in or relating to variable gain transistor amplifiers
GB1431384A (en) Turbine control circuit
ES462747A1 (en) Apparatus for obtaining feedback signals for controlling a parameter of an arc welding machine
GB1480437A (en) Adaptive current regulator
GB952904A (en) Improvements in or relating to amplifiers
GB1114342A (en) Voltage level detector or with tunnel diode
GB900605A (en) Current driving circuit
GB1499983A (en) Audio-frequency amplifiers
JPS5755605A (en) Differential amplifier
GB1481535A (en) Current regulator
JPS5686689A (en) Constant-current controlling device for resistance welding machine
GB1184211A (en) Alternating Voltage Generator
JPS56109012A (en) Automatic gain control circuit
GB1436627A (en) Automatic gain control circuit
GB816661A (en) Improvements in or relating to frequency changing circuit arrangements
GB1068852A (en) Improvements in and relating to electrical control devices
GB958318A (en) Power control circuit
JPS5368549A (en) Automatic gain control circuit
JPS56104539A (en) Oscillation/wave detection device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee