GB1338677A – Digital control system
– Google Patents
GB1338677A – Digital control system
– Google Patents
Digital control system
Info
Publication number
GB1338677A
GB1338677A
GB2074671A
GB2074671A
GB1338677A
GB 1338677 A
GB1338677 A
GB 1338677A
GB 2074671 A
GB2074671 A
GB 2074671A
GB 2074671 A
GB2074671 A
GB 2074671A
GB 1338677 A
GB1338677 A
GB 1338677A
Authority
GB
United Kingdom
Prior art keywords
phase
generator
thyristors
digital
degrees
Prior art date
1970-02-05
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
GB2074671A
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.)
General Electric Co
Original Assignee
General Electric 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.)
1970-02-05
Filing date
1971-04-19
Publication date
1973-11-28
1971-04-19
Application filed by General Electric Co
filed
Critical
General Electric Co
1973-11-28
Publication of GB1338677A
publication
Critical
patent/GB1338677A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H02M1/00—Details of apparatus for conversion
H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
H02M1/084—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
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
H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
H02P7/293—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC using phase control
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S388/00—Electricity: motor control systems
Y10S388/907—Specific control circuit element or device
Y10S388/911—Phase locked loop
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S388/00—Electricity: motor control systems
Y10S388/907—Specific control circuit element or device
Y10S388/917—Thyristor or scr
Abstract
1338677 Automatic control of speed GENERAL ELECTRIC CO 19 April 1971 [5 Feb 1970] 20746/71 Heading G3R In a digital system as for controlling the output of an A. C. power-source 1 Fig. 1 to a D.C. motor 2 in which oppositely poled thyristors or SCRs 3(a-c), 4(a-c) are fired with a controlled phase delay, firing circuits 5(a-c) are repeatedly loaded according to the digital output of a digital error generator 7 at times determined by a phase detector 9, and continue to count pulses from a clock generator 10, to give a signal firing the relevant thyristor when a predetermined count is reached. The phase detector 9 controls the loading of the input from the error generator 7 by signals on lines 9(a-c)-12(a-c) and also acts as a square wave generator and detector whereby the registers of counters in the firing circuits 5(a-c) are set either to a positive count and counting up for the positive phase or to a «two’s complement» setting, counting down for the negative phase. Outputs on lines 15(a-c) 16(a-c) from the phase detector 9 also determine which each pair of thyristors 3(a-c) or 4(a-c) is to be fired. The thyristors are arranged to start firing only during the last 120 degrees of each half cycle under maximum error signal conditions, the clock 10 therefor having a frequency which permits a delay of 120 degrees before the full count is reached. The arrangement also permits the thyristors to conduct for 60 degrees in the negative half of each phase cycle to permit dynamic motor braking. Control of the output from «phase detector» unit 9 for each phase can therefore be controlled by the change in polarity occurring in the preceding phase which occurs 120 degrees earlier at a time when the error signal for the following phase must be loaded. Alternative systems are referred to in which the digital error generator 7 may operate either by comparing digital numbers or pulse frequencies representing speeds and generated by the command generator 6 and a feed back device 8 associated with the load 2.
GB2074671A
1970-02-05
1971-04-19
Digital control system
Expired
GB1338677A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US892770A
1970-02-05
1970-02-05
Publications (1)
Publication Number
Publication Date
GB1338677A
true
GB1338677A
(en)
1973-11-28
Family
ID=21734532
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2074671A
Expired
GB1338677A
(en)
1970-02-05
1971-04-19
Digital control system
Country Status (6)
Country
Link
US
(1)
US3611097A
(en)
JP
(2)
JPS46819A
(en)
AU
(1)
AU2430371A
(en)
DE
(1)
DE2104922A1
(en)
ES
(1)
ES387953A1
(en)
GB
(1)
GB1338677A
(en)
Families Citing this family (20)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS46818A
(en)
*
1970-02-05
1971-09-04
US3671849A
(en)
*
1971-06-21
1972-06-20
Floyd E Kingston
Three-phase power controller
US3735241A
(en)
*
1971-12-28
1973-05-22
Engineering Inc T
Poly-phase digital controller
US4260947A
(en)
*
1977-10-11
1981-04-07
Massey David T
Phase control circuit for regulating power
US4245292A
(en)
*
1978-08-15
1981-01-13
Kalinichenko A Y
Method of digital control of m-phase thyristor-pulse d-c converters and apparatus for effecting same
US4329595A
(en)
*
1979-12-07
1982-05-11
The United States Of America As Represented By The United States Department Of Energy
AC Resonant charger with charge rate unrelated to primary power frequency
US4347562A
(en)
*
1980-06-23
1982-08-31
Oxy Metal Industries Corporation
Digital power converter trigger
JPS5768667A
(en)
*
1980-10-14
1982-04-27
Chiyoda:Kk
Polarity reversal type rectifying circuit
US4443759A
(en)
*
1981-05-07
1984-04-17
Magnaflux Corporation
Magnetizing current supply for magnetic particle inspection with SCR’s connected to three-phase secondary windings for rectification and control
US4464617A
(en)
*
1981-12-18
1984-08-07
Kharkovsky Politekhnichesky Institut
Superconducting synchronous electric machine
JPS5997672A
(en)
*
1982-11-29
1984-06-05
テルモ株式会社
Syringe injection apparatus
US4490780A
(en)
*
1983-02-02
1984-12-25
Allen-Bradley Company
Digital power converter
NL8602895A
(en)
*
1986-11-14
1988-06-01
Johnson Service Co
DEVICE FOR CONTROLLING THE POWER OF AN INDUCTIVE TAX.
US4771224A
(en)
*
1987-04-16
1988-09-13
Westinghouse Electric Corp.
Digital pulse generator for controlled thyristor switches and motor drive embodying the same
FR2637745B1
(en)
*
1988-10-06
1991-01-04
Electricite De France
METHOD AND DEVICE FOR TRIGGERING A NETWORK SWITCHED ELECTRONIC CONVERTER
JPH0524343Y2
(en)
*
1989-09-25
1993-06-21
AU630328B3
(en)
*
1992-02-10
1992-10-22
Tsui, Huai-Chi Wang,
Apparatus for triggering a plurality of thyristor devices
US5444214A
(en)
*
1993-12-06
1995-08-22
The Lincoln Electric Company
Apparatus and method for synchronizing a firing circuit for a brushless alternator rectified D. C. welder
US5408067A
(en)
*
1993-12-06
1995-04-18
The Lincoln Electric Company
Method and apparatus for providing welding current from a brushless alternator
US7475295B2
(en)
*
2005-10-28
2009-01-06
International Business Machines Corporation
Intelligent watchdog circuit
Family Cites Families (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2537427A
(en)
*
1949-09-19
1951-01-09
North American Aviation Inc
Digital servo
US3196262A
(en)
*
1961-12-14
1965-07-20
Gen Electric
Binary comparator
US3176208A
(en)
*
1962-07-02
1965-03-30
North American Aviation Inc
Phase locking control device
US3249838A
(en)
*
1963-04-02
1966-05-03
Square D Co
Full wave d. c. motor speed and position control system
US3431479A
(en)
*
1965-10-07
1969-03-04
Gen Electric
Phase controlled power amplifier lockout circuit
GB1135269A
(en)
*
1966-07-20
1968-12-04
Rosemount Eng Co Ltd
Improvements in or relating to systems for controlling electrical power
JPS46818A
(en)
*
1970-02-05
1971-09-04
1970
1970-02-05
US
US8927A
patent/US3611097A/en
not_active
Expired – Lifetime
1970-02-05
JP
JP44817170A
patent/JPS46819A/ja
active
Pending
1971
1971-01-13
AU
AU24303/71A
patent/AU2430371A/en
not_active
Expired
1971-02-03
DE
DE19712104922
patent/DE2104922A1/en
active
Pending
1971-02-04
ES
ES387953A
patent/ES387953A1/en
not_active
Expired
1971-04-19
GB
GB2074671A
patent/GB1338677A/en
not_active
Expired
1977
1977-08-16
JP
JP1977108833U
patent/JPS5436261Y2/ja
not_active
Expired
Also Published As
Publication number
Publication date
AU2430371A
(en)
1972-07-20
JPS5436261Y2
(en)
1979-11-02
JPS46819A
(en)
1971-09-04
DE2104922A1
(en)
1971-08-12
US3611097A
(en)
1971-10-05
ES387953A1
(en)
1974-05-01
JPS5330150U
(en)
1978-03-15
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Legal Events
Date
Code
Title
Description
1974-04-10
PS
Patent sealed [section 19, patents act 1949]
1983-12-07
PCNP
Patent ceased through non-payment of renewal fee
