GB1436770A - Pulse modulation switching circuit - Google Patents

Pulse modulation switching circuit

Info

Publication number
GB1436770A
GB1436770A GB4402573A GB4402573A GB1436770A GB 1436770 A GB1436770 A GB 1436770A GB 4402573 A GB4402573 A GB 4402573A GB 4402573 A GB4402573 A GB 4402573A GB 1436770 A GB1436770 A GB 1436770A
Authority
GB
United Kingdom
Prior art keywords
commutating
load current
inductance
thyristor
load
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
GB4402573A
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 GB1436770A publication Critical patent/GB1436770A/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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/125—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/135—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/137—Conversion of dc power input into dc power output without intermediate conversion into ac 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 automatic control of output voltage or current, e.g. switching regulators
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F5/00—Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/305—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M3/315—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M3/3155—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of the output voltage or current

Abstract

1436770 Commutating circuits BBC BROWN BOVERI & CO Ltd 19 Sept 1973 [21 Sept 1972] 44025/73 Heading H3T In a pulse modulation switching circuit comprising a control device 3, Fig. 1, a controllable load current semi-conductor switching device ST and a commutating circuit including a commutating capacitor Ck, a controllable commutating semi-conductor device SC, a reversing choke 4 and a reversing diode connected in parallel with the switching device ST as shown for operation on a D.C. supply voltage 1, 2 of varying amplitude, connected in parallel with the output load terminals 5, 6 of the switching circuits is an inductance L1 which after the load current switching device ST has been turned on, is magnetized by a magnetic flux which is proportional to the D.C. supply voltage 1, 2 and for a duration of flow of the load current which is determined by the control device 3 and when the load-current switching device ST is turned off, the inductance L1 can be demagnetized by decrease in magnetic flux which is proportional to the difference between the D.C. supply voltage and the voltage which the commutating capacitor is required to be charged to during charging of the commutating capacitor C k . When the load current thyristor ST is turned on by a turn on signal from 3a of the control device 3 current flows through the inductance L1 and at the same moment the reversal of the commutating capacitor Ck also begins through the load current thyristor ST, the reversing diode and the reversing choke 4. When the control 3 has measured that the energy stored in inductance L1 is sufficient to charge the commutating capacitor C c to the rated voltage the control 3 turns on the commutating thyristor SC. The load current thyristor ST becomes blocked and the commutating capacitor Ck has its charge reversed by the load current and the inductance L1 until it is charged in the reverse polarity, to the value of the input voltage so that the output voltage has become zero. The load current is decoupled from the pulse modulation switching circuit by the diode D2 conducting and the diode D1 turning off. The current in the inductance L1 now further reverses the charge of the capacitor C k until it has again reached the initial state previously determined by the control 3. As the current has fallen to zero so the commutating thyristor SC is again blocked. With a low input voltage Ue (Fig. 2a, not shown) the load current thyristor ST is turned on longer to store more energy in the inductance than for a high input voltage (Fig. 2b, not shown) where the load current thyristor ST is turned on for a shorter time so that the energy stored during the turn on period is sufficient to charge the commutating capacitor Ck to its rated voltage after the commutating thyristor SC has turned on. The load L 2 may be a field or armature coil. In a modification the inductance L 1 is replaced by a transformer TV, Fig. 3, feeding a battery load B through a diode and a smoothing choke L 3 . A regulating device may be connected between the terminals 6, 7 of the switching circuit so as to adjust the mean D.C. voltage between 6, 7 to a preset value by varying the period of time between two firings of the load current thyristor ST and hence the pulse repetition frequency of the switching circuit.
GB4402573A 1972-09-21 1973-09-19 Pulse modulation switching circuit Expired GB1436770A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722246258 DE2246258C3 (en) 1972-09-21 1972-09-21 Circuit arrangement for direct current supply of a consumer connected to a freewheeling diode

Publications (1)

Publication Number Publication Date
GB1436770A true GB1436770A (en) 1976-05-26

Family

ID=5856914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4402573A Expired GB1436770A (en) 1972-09-21 1973-09-19 Pulse modulation switching circuit

Country Status (7)

Country Link
AT (1) AT327330B (en)
CH (1) CH555108A (en)
DE (1) DE2246258C3 (en)
FR (1) FR2200695B3 (en)
GB (1) GB1436770A (en)
IT (1) IT993304B (en)
SE (1) SE387491B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511792A3 (en) * 2011-07-26 2015-01-15 Eaton Gmbh SWITCHGEAR

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE32787E (en) * 1982-07-28 1988-11-22 Amphenol Corporation Sealing ring for an electrical connector
FR3132073A1 (en) 2022-01-27 2023-07-28 Psa Automobiles Sa Bonnet stopper with programmed breakage for pedestrian impact.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT511792A3 (en) * 2011-07-26 2015-01-15 Eaton Gmbh SWITCHGEAR
AT511792B1 (en) * 2011-07-26 2015-02-15 Eaton Gmbh SWITCHGEAR

Also Published As

Publication number Publication date
FR2200695A1 (en) 1974-04-19
SE387491B (en) 1976-09-06
ATA742973A (en) 1975-04-15
FR2200695B3 (en) 1976-08-20
DE2246258B2 (en) 1980-03-27
CH555108A (en) 1974-10-15
DE2246258A1 (en) 1974-03-28
IT993304B (en) 1975-09-30
DE2246258C3 (en) 1980-11-13
AT327330B (en) 1976-01-26

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee