GB1375267A – – Google Patents
GB1375267A – – Google Patents
Info
Publication number
GB1375267A
GB1375267A
GB1963572A
GB1963572A
GB1375267A
GB 1375267 A
GB1375267 A
GB 1375267A
GB 1963572 A
GB1963572 A
GB 1963572A
GB 1963572 A
GB1963572 A
GB 1963572A
GB 1375267 A
GB1375267 A
GB 1375267A
Authority
GB
United Kingdom
Prior art keywords
transformer
event
load
filter
resonant
Prior art date
1971-06-18
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
GB1963572A
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.)
1971-06-18
Filing date
1972-04-27
Publication date
1974-11-27
1972-04-27
Application filed
filed
Critical
1974-11-27
Publication of GB1375267A
publication
Critical
patent/GB1375267A/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
H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
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
H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
H02P29/02—Providing protection against overload without automatic interruption of supply
H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
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
H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency
Abstract
1375267 Protecting inverters EMERSON ELECTRIC CO 27 April 1972 [18 June 1971] 19635/72 Heading H2F An inverter (not shown) feeding output lines 14a, 14b having at least one series resonant filter 16a, 17a in its path to the load is protected by a transformer 45 across one of the filter components 16a or 17a and, in the event of overload, a static switch 43 is fired which reduces the impedance across transformer 45. As described, a signal is fed on line 23 in the event of fuse failure, over current or other fault which triggers thyristor 97 so as to turn on thyristors 76 … 78 of the static switch 43 so as to connect a common resistor 85 (0À055 ohm, 200 W) across the secondaries of transformer 45 and thus damp the voltage in the resonant filter. A relay 107 having a time delay dash-pot may be included to open circuit the load such as a threephase motor. In the event of a partial overload, insufficient to operate the fuse, diodes 73 … 75 become conductive, damping the resonant filter by feeding current back to D.C. supply 12a, 12b. In Fig. 5 (not shown) three inverters having individual resonant filters and individual protective circuits are connected in parallel to the load.
GB1963572A
1971-06-18
1972-04-27
Expired
GB1375267A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US15438271A
1971-06-18
1971-06-18
Publications (1)
Publication Number
Publication Date
GB1375267A
true
GB1375267A
(en)
1974-11-27
Family
ID=22551143
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1963572A
Expired
GB1375267A
(en)
1971-06-18
1972-04-27
Country Status (8)
Country
Link
US
(1)
US3711759A
(en)
CA
(1)
CA961918A
(en)
CH
(1)
CH573676A5
(en)
DE
(1)
DE2223828C3
(en)
FR
(1)
FR2142042B1
(en)
GB
(1)
GB1375267A
(en)
IT
(1)
IT955853B
(en)
NL
(1)
NL7207908A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP1655832A1
(en)
*
2004-11-08
2006-05-10
Siemens Aktiengesellschaft
Driving device
Families Citing this family (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CH586483A5
(en)
*
1975-01-16
1977-03-31
Bbc Brown Boveri & Cie
US4139885A
(en)
*
1977-06-20
1979-02-13
Borg-Warner Corporation
Fault protection circuit
US4158864A
(en)
*
1977-07-05
1979-06-19
Electric Power Research Institute, Inc.
Fault current limiter
US4224661A
(en)
*
1978-09-13
1980-09-23
Chuguev Jury M
Externally commutated compensation-type converter system and method of forced commutation and blocking of rectifiers thereof
US5598079A
(en)
*
1992-04-16
1997-01-28
Remtech, L.C.
A.C. induction devices having tuned compound windings
US20130039105A1
(en)
*
2011-08-09
2013-02-14
Hamilton Sundstrand Corporation
Filter circuit for a multi-phase ac input
AT512064B1
(en)
*
2011-10-31
2015-11-15
Fronius Int Gmbh
HIGH-FLOW TRANSFORMER, TRANSFORMER ELEMENT, CONTACT PLATE AND SECONDARY WINDING, AND METHOD FOR PRODUCING SUCH A HIGH-SPEED TRANSFORMER
GB2520961A
(en)
*
2013-12-04
2015-06-10
Eaton Ind Netherlands Bv
Automatic reclosing alternating current circuit breaker
Family Cites Families (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US1651021A
(en)
*
1926-02-10
1927-11-29
Bell Telephone Labor Inc
Voltage-limiting device
US1625464A
(en)
*
1926-04-22
1927-04-19
Frazer W Gay
Electrical-current-limiting system
US1755111A
(en)
*
1927-03-23
1930-04-15
Gen Electric
Current-limiting means
US3295018A
(en)
*
1963-05-21
1966-12-27
Westinghouse Electric Corp
Electrical apparatus
GB1114243A
(en)
*
1963-10-28
1968-05-22
Plessey Uk Ltd
Improvements in or relating to alternating current limiting circuit arrangements
DE1213039B
(en)
*
1964-01-04
1966-03-24
Licentia Gmbh
Arrangement to limit overcurrents
GB1131504A
(en)
*
1965-11-03
1968-10-23
Ass Elect Ind
Improved alternating current power network interconnection
US3436600A
(en)
*
1966-06-01
1969-04-01
Eryx Corp
Reactance protection apparatus and method
1971
1971-06-18
US
US3711759D
patent/US3711759A/en
not_active
Expired – Lifetime
1972
1972-04-26
CA
CA140,655A
patent/CA961918A/en
not_active
Expired
1972-04-27
GB
GB1963572A
patent/GB1375267A/en
not_active
Expired
1972-05-16
DE
DE2223828A
patent/DE2223828C3/en
not_active
Expired
1972-05-25
IT
IT2485472A
patent/IT955853B/en
active
1972-06-09
NL
NL7207908A
patent/NL7207908A/xx
unknown
1972-06-16
FR
FR7221877A
patent/FR2142042B1/fr
not_active
Expired
1972-06-16
CH
CH893972A
patent/CH573676A5/xx
not_active
IP Right Cessation
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP1655832A1
(en)
*
2004-11-08
2006-05-10
Siemens Aktiengesellschaft
Driving device
Also Published As
Publication number
Publication date
CA961918A
(en)
1975-01-28
IT955853B
(en)
1973-09-29
NL7207908A
(en)
1972-12-20
FR2142042A1
(en)
1973-01-26
CH573676A5
(en)
1976-03-15
DE2223828C3
(en)
1974-11-28
US3711759A
(en)
1973-01-16
DE2223828B2
(en)
1974-04-18
FR2142042B1
(en)
1977-12-23
DE2223828A1
(en)
1972-12-21
Similar Documents
Publication
Publication Date
Title
US3259802A
(en)
1966-07-05
Ground fault responsive protective system for electric power distribution apparatus
US4025820A
(en)
1977-05-24
Contactor device including arc supression means
US3215896A
(en)
1965-11-02
Fast response overload protection circuit
GB827902A
(en)
1960-02-10
Improvements in or relating to rectifier systems
GB1375267A
(en)
1974-11-27
US3334243A
(en)
1967-08-01
Semiconductor timing networks
GB1142783A
(en)
1969-02-12
Improvements relating to protective arrangements including electric level-responsive circuits
GB1451564A
(en)
1976-10-06
Electrical network protection device
US2207577A
(en)
1940-07-09
Electric protective system
US3456125A
(en)
1969-07-15
High speed protective circuit for regulating transistors
GB1262768A
(en)
1972-02-09
Improvements in electrical inverting arrangements
US3312862A
(en)
1967-04-04
Semiconductor leakage detector and control circuit
GB1455280A
(en)
1976-11-10
Circuit breaker having a polyphase control circuit
GB1097809A
(en)
1968-01-03
Improved circuit breaker control system
GB1254587A
(en)
1971-11-24
Circuits and methods for protecting electrical machining apparatus
US3386024A
(en)
1968-05-28
Apparatus for providing a direct potential output from a multiphase alternating potential input
US3089036A
(en)
1963-05-07
Transistor protective circuit
US3522478A
(en)
1970-08-04
Directional relay for circuit interrupters
GB1309820A
(en)
1973-03-14
Gatecontrolled phase failure protection circuit
US3056043A
(en)
1962-09-25
Gate having voltage divider shunting series emitter-collector paths and individual base-bias level setting means equalizing transistor leakage currents
US3325688A
(en)
1967-06-13
Phase angle sensing circuit for distance relays
US3023345A
(en)
1962-02-27
Three phase protective relay system responsive to amplitude of ripple voltage
GB1020101A
(en)
1966-02-16
Unbalanced current protection system for use with paralleled generators
GB950183A
(en)
1964-02-19
Improvements in and relating to electrical circuits employing transistor networks
US3207951A
(en)
1965-09-21
System and device for the protection of electric networks
Legal Events
Date
Code
Title
Description
1975-04-09
PS
Patent sealed [section 19, patents act 1949]
1977-11-23
PLNP
Patent lapsed through nonpayment of renewal fees
