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EP0082387A1 - Procédé pour l'amorçage d'une valve contrôlable à semi-conducteur d'un appareil de commutation à courant alternatif et circuit pour la mise en oeuvre du procédé - Google Patents

Procédé pour l'amorçage d'une valve contrôlable à semi-conducteur d'un appareil de commutation à courant alternatif et circuit pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0082387A1
EP0082387A1 EP82111238A EP82111238A EP0082387A1 EP 0082387 A1 EP0082387 A1 EP 0082387A1 EP 82111238 A EP82111238 A EP 82111238A EP 82111238 A EP82111238 A EP 82111238A EP 0082387 A1 EP0082387 A1 EP 0082387A1
Authority
EP
European Patent Office
Prior art keywords
contact point
switching
current
semiconductor valve
controllable semiconductor
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.)
Withdrawn
Application number
EP82111238A
Other languages
German (de)
English (en)
Inventor
Manfred Prof. Dr.-Ing. Lindmayer
Thomas Dr. Kölpin
Stephan Greitzke
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 Germany
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Publication of EP0082387A1 publication Critical patent/EP0082387A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/541—Contacts shunted by semiconductor devices
    • H01H9/542—Contacts shunted by static switch means

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a circuit arrangement for performing the method.
  • the wear on the contact and extinguishing system of high-frequency switching devices in heavy duty operation can be significantly reduced by using so-called hybrid switches.
  • the load current is commutated to a bypass and there switched off by built-in semiconductor valves in its zero crossing. If controllable valves are used in the bypass of the mechanical switching point, these valves must be ignited immediately after the contact piece has opened in order to take over the load current and to minimize the effects of the switching arcs which form.
  • the hybrid switching concept is to be used at a single interruption point, for example in order to use the second interruption point of a double-ended interruption system, as in DE-OS 31 37 321, for the production of the electrical isolation of the circuit, the control circuit of the controllable semiconductor valve must be avoided to avoid a new one Ignition can also be electrically interrupted by the voltage recurring on the interruption voltage.
  • the object of the invention is to provide a method of the type mentioned in the introduction, in which the control current is influenced in the simplest possible manner without the use of additional auxiliary holders.
  • This object is achieved in that the connection of the control current to the controllable Semiconductor valve for its ignition is controlled by a measurement signal generated by the current flow via the contact point.
  • a circuit arrangement for carrying out this method in which the controllable semiconductor valve is connected in parallel to the contact point, is characterized according to the invention in that a measuring device is connected in series with the contact point, the measuring signal of which can be fed to a switching device which switches the control current through to the controllable semiconductor valve.
  • the main circuit of a hybrid switch designed according to the invention is between two terminals 1 and 2. Between the two terminals 1 and 2 there is a contact point 3 which can be actuated in the usual way, i. H. can be moved from an off position to an on position and vice versa.
  • the switching arc which arises when the contact point 3 is opened is commutated by commutation of the load current I onto a controllable semiconductor valve 4 which is connected in parallel with the contact point 3 and is designed as a triac and is extinguished at the zero crossing. Instead of a triac, an anti-parallel thyristor pair could also be used.
  • a current measuring point 5 is also inserted into the main circuit in such a way that the current flowing through the contact point 3, but not the current flowing via the controllable semiconductor valve 4, is detected.
  • the current measuring point or current measuring device 5 is connected to a switching device 7 which is connected in the control circuit for the controllable semiconductor valve.
  • a control current source 6 is located in the control circuit.
  • the switching device is controlled in the forward direction by means of the measurement signal generated by the current measuring device 5 when a current flows through the contact point 3 ert, so that a control current generated by the control current source 6 for the controllable semiconductor valve 4 is switched through to this. If a load current flows through the current measuring device 5, this load current generates the measurement signal which drives the switching device, so that the controllable semiconductor valve is ignited. If a switching arc occurs at the contact point, the load current is commutated to the controllable semiconductor valve due to the higher resistance at the contact point and is interrupted there in its next zero crossing. A new current flow in the following half-waves can no longer start, since the switching device is blocked due to the missing measurement signal. In principle, the arrangement according to FIG. 1 is therefore suitable both for extinguishing switch-off and switch-on arcs.
  • the hybrid switch according to FIG. 1 has been modified to the extent that the voltage drop across the switching arc at contact point 3 itself is used as the voltage source for generating the control current for the controllable semiconductor valve.
  • the control circuit for the controllable semiconductor valve 4 is connected in parallel to the contact point.
  • this parallel branch there is a current limiter 8 in front of the switching device 7, which current limiter can be designed, for example, as a linear or non-linear resistor.
  • the control current for the controllable semiconductor valve 4 is thus removed from the load circuit via the current limiter 8 as soon as a voltage drop occurs at the contact point 3 due to a switching arc and at the same time the measurement signal generated by the current measuring device 5, which signals the presence of the load current I. and switches through the switching device 7. Then when the switching device 7 through - or is turned on, the controllable semiconductor valve 4 is ignited again.
  • the transfer function of the current measuring device 5 can be binary (current-no current) or analog (depending on the ignition on the level of the current). Circuits or components with a high differential internal resistance are particularly suitable as current limiters 8 in order to ensure a level of the control current that is conducive to the controllable semiconductor valve 4 both when the driving voltage of the load circuit is present and when the arc voltage of the contact point 3 is approximately one order of magnitude lower.
  • FIG. 3 shows a hybrid switch implemented according to the invention, in which the principle shown in FIG. 2 is used.
  • two thyristors 9 and 10 are connected antiparallel, which thyristors 9 and 10 are connected to the connection terminals 1 and 2.
  • An RC element 11, 12 is connected in parallel with the two thyristors 9 and 10 and is used to dampen overvoltages that occur.
  • a fuse 13 is connected in front of the two thyristors, the thyristors 9 and 10 protects or protects against excessive load currents.
  • diodes 14 and -15 are connected, which in a manner known per se prevent an excessive reverse voltage loading of these gate-cathode sections of the thyristors.
  • the terminals 1 and 2 are additionally connected via the contact point 3, which can be formed in a manner not shown, for example, by the first opening half of a double break system according to the circuit arrangement according to the DE-OS 31 37 321 with the current measuring device 5 designed as a current transformer.
  • This current converter also referred to below with the reference number 5, is located directly in front of the contact point and the two thyristors are parallel to the series circuit comprising the contact point and the current measuring device.
  • the secondary side of the current transformer 5 is connected to a bridge rectifier 16, a zener diode 17 being connected in parallel with the direct current output of the bridge rectifier 16 and a resistor 18 being connected in parallel with the zener diode 17.
  • the corresponding Zener voltage is set at the resistor 18, which is practically independent of the instantaneous value of the primary current in the transformer 5 in a manner known per se as soon as this current differs from zero at all.
  • This voltage is connected to the gate-source control path of a vertical MOS field-effect transistor 19 serving as a variable resistor, which in the presence of a current flow in the current transformer 5 and a voltage drop at the contact point 3 at source-drain voltages above a few volts is one of the Gate-source voltage dependent constant current in the control electrode for the respective load current polarity responsible thyristor 9 or 10 drives and ignites it. Since the field effect transistor 19 works as a controllable resistor only for currents of one polarity, this polarity is provided by a bridge rectifier 20 in a manner known per se.
  • the resistor 18 ensures, among other things, that the gate-source voltage of the transistor 19 quickly drops below a minimum value dependent on the transistor 19 after the current flow in the primary side of the current transformer 5 has been discharged, thereby making the transistor 19 safe locks. Types are to be selected for the vertical MOS transistor 19 whose permissible drain-source voltage is surely above the voltage peaks occurring in the load circuit.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
EP82111238A 1981-12-11 1982-12-04 Procédé pour l'amorçage d'une valve contrôlable à semi-conducteur d'un appareil de commutation à courant alternatif et circuit pour la mise en oeuvre du procédé Withdrawn EP0082387A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813149029 DE3149029A1 (de) 1981-12-11 1981-12-11 Verfahren zur zuendung wenigstens eines steuerbaren halbleiterventiles fuer ein wechselstromschaltgeraet und schaltungsanordnung zur druchfuerhung des verfahrens
DE3149029 1981-12-11

Publications (1)

Publication Number Publication Date
EP0082387A1 true EP0082387A1 (fr) 1983-06-29

Family

ID=6148431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111238A Withdrawn EP0082387A1 (fr) 1981-12-11 1982-12-04 Procédé pour l'amorçage d'une valve contrôlable à semi-conducteur d'un appareil de commutation à courant alternatif et circuit pour la mise en oeuvre du procédé

Country Status (2)

Country Link
EP (1) EP0082387A1 (fr)
DE (1) DE3149029A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028567A1 (fr) * 1993-05-28 1994-12-08 Siemens Aktiengesellschaft Sectionneurs hybrides de puissance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633069A (en) * 1970-01-14 1972-01-04 Merlin Gerin Alternating current circuit-interrupting system comprising a rectifier shunt path
DE2016525B2 (de) * 1970-04-02 1978-09-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur Zündung von Thyristoren

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633069A (en) * 1970-01-14 1972-01-04 Merlin Gerin Alternating current circuit-interrupting system comprising a rectifier shunt path
DE2016525B2 (de) * 1970-04-02 1978-09-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur Zündung von Thyristoren

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"Soviet Inventions Illustrated", Week C 47, 7. Januar 1981, Section X 13 *
"Soviet Inventions Illustrated", Week C 47, 7. Januar 1981, Section X 13 & SU-A-721859 *
"Soviet Inventions Illustrated", Week C 48, 14. Januar 1981, Section X 13 & SU-A-721859 *
"Soviet Inventions Illustrated", Week D 15, 20. Mai 1981, Section V 03 & SU-A-748542 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994028567A1 (fr) * 1993-05-28 1994-12-08 Siemens Aktiengesellschaft Sectionneurs hybrides de puissance

Also Published As

Publication number Publication date
DE3149029A1 (de) 1983-06-16

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19830915

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850109

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LINDMAYER, MANFRED, PROF., DR.-ING.

Inventor name: KOELPIN, THOMAS, DR.

Inventor name: GREITZKE, STEPHAN