GB1338678A – Digital firing technique
– Google Patents
GB1338678A – Digital firing technique
– Google Patents
Digital firing technique
Info
Publication number
GB1338678A
GB1338678A
GB2074771A
GB2074771A
GB1338678A
GB 1338678 A
GB1338678 A
GB 1338678A
GB 2074771 A
GB2074771 A
GB 2074771A
GB 2074771 A
GB2074771 A
GB 2074771A
GB 1338678 A
GB1338678 A
GB 1338678A
Authority
GB
United Kingdom
Prior art keywords
signals
digital
counters
comparators
phase
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
GB2074771A
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 GB1338678A
publication
Critical
patent/GB1338678A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
Y10S388/912—Pulse or frequency counter
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
1338678 Automatic control of speed GENERAL ELECTRIC CO 19 April 1971 [5 Feb 1970] 20747/71 Heading G3R In a digital control system for controlling the output of power from a 3-phase A.C. power source 1, Fig.1, to a D.C. motor 2, oppositely poled thyristors or SCR’s 3 (a-c) 4 (a-c) are selectively fired with a controlled phase delay and reversible preset counters (30) Fig.4 (not shown) in the firing circuits 5 (a-c) are repeatedly loaded at an appropriate point in each half cycle to a maximum positive or negative (two’s complement) setting according to signals from a phase detection logic unit 9. The firing circuits 5 (a-c) contain parallel digital comparators (60) Fig. 6 (not shown) which compare the signals from a digital error generator 7 with the registers of the counters (30) which are set to count up or down according to the phase detected, the comparators giving a signal to fire the relevant thyristor 3 (a-c), 4 (a-c). Signals from the error generator 7 are obtained by comparison of signals from a command generator 6 and a feed back device 8 driven from the controlled motor 2. The counting is performed by pulses from a clock generator 13 as described in Specification 1338677 but the control system differs from that described with reference to Fig. 1 of that application in that comparators (60) are used in the firing circuits 5 (a-c) and the reversible counters (30) Fig.4 (not shown) are continuously monitored in a parallel system particularly suited to digital servo systems operating under highly transient conditions. The system is otherwise similar to that described in the Specification 1338677 and includes inhibited NAND gates (61), (62), Fig.6 (not shown) which prevent any erratic firing of the thyristors, SCR’s etc. resulting from a noise signal when the preset numbers are loaded into the reversible counters (30).
GB2074771A
1970-02-05
1971-04-19
Digital firing technique
Expired
GB1338678A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US8928A
US3601674A
(en)
1970-02-05
1970-02-05
Control system for firing scr{3 s in power conversion apparatus
Publications (1)
Publication Number
Publication Date
GB1338678A
true
GB1338678A
(en)
1973-11-28
Family
ID=21734535
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2074771A
Expired
GB1338678A
(en)
1970-02-05
1971-04-19
Digital firing technique
Country Status (6)
Country
Link
US
(1)
US3601674A
(en)
JP
(2)
JPS46818A
(en)
AU
(1)
AU2430471A
(en)
DE
(1)
DE2104866A1
(en)
ES
(1)
ES387954A1
(en)
GB
(1)
GB1338678A
(en)
Families Citing this family (16)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3991359A
(en)
*
1969-02-13
1976-11-09
Westinghouse Electric Corporation
Power regulation system
US3611097A
(en)
*
1970-02-05
1971-10-05
Gen Electric
Digital control system for ac to dc power conversion apparatus
US4104570A
(en)
*
1976-10-12
1978-08-01
Reliance Electric Company
Digital control system for motors
DE2747476C2
(en)
*
1976-12-10
1983-12-15
General Electric Co., Schenectady, N.Y.
Method for regulating a parameter of a consumer in a system containing a data processor and regulating system for carrying out the method
US4308494A
(en)
*
1977-10-31
1981-12-29
General Electric Co.
Thyristor power controller for an electrostatic precipitator
US4337509A
(en)
*
1980-07-22
1982-06-29
Hitachi, Ltd.
Method and apparatus for controlling firing phases of thyristors
US4446414A
(en)
*
1981-11-19
1984-05-01
General Electric Company
Terminal voltage limit regulator for a load commutated inverter
US4449087A
(en)
*
1981-12-23
1984-05-15
General Electric Company
Flux feedback firing control for a load commutated inverter
US4443747A
(en)
*
1982-04-01
1984-04-17
General Electric Company
Transitioning between multiple modes of inverter control in a load commutated inverter motor drive
US4475150A
(en)
*
1982-04-28
1984-10-02
General Electric Company
Coordinated load commutated inverter protection system
US4628460A
(en)
*
1982-09-17
1986-12-09
Eaton Corporation
Microprocessor controlled phase shifter
US4593348A
(en)
*
1983-04-16
1986-06-03
Autola Stromrichter Gmbh & Co. Kg
Device for the generation of regulated and/or adjustable direct voltages or direct currents
US6385066B1
(en)
2000-11-01
2002-05-07
General Electric Corporation
Method and system for detecting a zero current level in a line commutated converter
US6542023B1
(en)
*
2001-10-10
2003-04-01
International Business Machines Corporation
AC transfer switch using semiconductor devices
US9106162B2
(en)
*
2012-08-31
2015-08-11
Ford Global Technologies, Llc
Control strategy for an electric machine in a vehicle
US11487651B2
(en)
*
2020-07-06
2022-11-01
Fujifilm Medical Systems U.S.A., Inc.
Systems and methods for quantifying the effectiveness of software at displaying a digital record
Family Cites Families (6)
* 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
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
US3611097A
(en)
*
1970-02-05
1971-10-05
Gen Electric
Digital control system for ac to dc power conversion apparatus
1970
1970-02-05
US
US8928A
patent/US3601674A/en
not_active
Expired – Lifetime
1970-02-05
JP
JP44807170A
patent/JPS46818A/ja
active
Pending
1971
1971-01-13
AU
AU24304/71A
patent/AU2430471A/en
not_active
Expired
1971-02-03
DE
DE19712104866
patent/DE2104866A1/en
active
Pending
1971-02-04
ES
ES387954A
patent/ES387954A1/en
not_active
Expired
1971-02-05
JP
JP46004480A
patent/JPS5228217B1/ja
active
Pending
1971-04-19
GB
GB2074771A
patent/GB1338678A/en
not_active
Expired
Also Published As
Publication number
Publication date
ES387954A1
(en)
1974-05-01
JPS46818A
(en)
1971-09-04
US3601674A
(en)
1971-08-24
AU2430471A
(en)
1972-07-20
DE2104866A1
(en)
1971-08-19
JPS5228217B1
(en)
1977-07-25
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Legal Events
Date
Code
Title
Description
1974-04-10
PS
Patent sealed [section 19, patents act 1949]
1991-05-22
PE20
Patent expired after termination of 20 years
