CS238527B1 - Connecting the protective circuit against the commutation switching of the current inverter - Google Patents
Connecting the protective circuit against the commutation switching of the current inverter Download PDFInfo
- Publication number
- CS238527B1 CS238527B1 CS84497A CS49784A CS238527B1 CS 238527 B1 CS238527 B1 CS 238527B1 CS 84497 A CS84497 A CS 84497A CS 49784 A CS49784 A CS 49784A CS 238527 B1 CS238527 B1 CS 238527B1
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- Czechoslovakia
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- commutating
- current inverter
- commutation
- protective circuit
- circuit against
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- Inverter Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
Zapojenie riesi ochranu polovodičových prvkov proti komutačným prepatiam prúdového striedača· Ochranný RC obvod tvoria odpory paralelné připojené ku komutačným tlmivkám a komutačně kondenzáto· ry striedača.The connection solves the protection of semiconductor elements against commutation overvoltages of the current inverter. The protective RC circuit consists of resistors connected in parallel to the commutation chokes and commutation capacitors of the inverter.
Description
1- 238 S271- 238 S27
Vynález sa týká zapoj enia ochranného obvodu proti komutačným prepátiam prúdového striedača, u ktorého sú k spoločným bo-dom tyriatorov a oddělovacích diod zapojené komutačné kondenzá-tory cez komutačné tlmivky.BACKGROUND OF THE INVENTION The present invention relates to the connection of a protective circuit to a commutating prepatient of a current inverter in which commutation condensers are connected to the common terminals of the torque converters via commutating chokes.
Doteraz používané zapojenia pouzí vajú ochrany proti komu-So far, the use of
I tačným prepátiam vytvořené zo samostatných odporov a kondenzá-torov připojených paralelné ku chráněným polovodičovým prvkomalebo sa komutačné prepátia obmedzujú plávájúcimi ochranami.Kondenzátory uvedených ochran sú namáhané velkými striedavými napatiami a obvody plávajúcich ochrán sú pre striedače men-ších výkonov poměrně drahé, zvyšujú mateřiálovú náročnost acelkovú poruchovost zariadenia.The triggering capacitors formed from separate resistors and condensers connected in parallel to the protected semiconductor element or commutating loads are limited by the floating protectors. The capacitors of the above protectors are subjected to high alternating voltages, and the circuits of the floating protectors are relatively expensive for inverters of lower power, increasing the material demand and overall equipment failure rate.
Vyššie uvedené nedostatky podstatné odstraňujó zapojeniepodlá vynálehu, ktorého podstata spočívá v tom, že polovodičo-vé prvky prúdového striedača proti komutačným prepatiam súchráněné obvodmi RC-ochrán, pričom odpory ochrán sú zapojenéparalelné ku komutačným tlmivkám a komutačné kondenzátory plniazároveň funkciu kondenzátorov RC-ochrán. - 2 - 238 827The aforementioned drawbacks substantially eliminate the connection according to the invention, which consists in that the semiconductor elements of the current inverter against commutating overrides are protected by RC-protection circuits, while the protective resistors are connected in parallel to the commutating chokes and the commutation capacitors also function as capacitors RC-protectors. - 2 - 238 827
Zapoj enie podl’a vynálezu a minimálnym počtom prvkov spo-1’ahlivo chrání polovodičové prvky striedača proti komutačnýmprepatiam.Involvement of the invention and the minimum number of elements reliably protects the inverter's semiconductor devices against commutating transitions.
Vynález je znázorněný na výkrese, kde 1¼ nakreslené zapo-jenie prúdového striedača s nútenou komutáciou. Medzi prepoje ty-ristorov a oddělovacích diod do bodov 2# 2, 2» £» 2» 2 Při-pojené cez komutačně tlmivky L1, L2, 13, L4« L5, L6, komutačnékondenzátory C1, C2, C3« C4, C5« C6. Paralelné ku komutačnýmtlmivkám sú připojené ochranné odpory R1, R2, R3, R4, R5. R6. V zapojení podlá výkresu1 , pri komutácií prúdu medzi ty-ristormi, je cez zopnutý tyristor připojený ochranný RC-obvodna tyristor, v ktorom zaniká prúd. Ochranný RC-obvod tvoria odporyparalelné připojené ku komutačným tlmivkám a komutačné konden-zátory striedača. Prepátia, ktoré vznikájú pri rýchlyoh změ-nách prúdu počas komutácie na komutačných indukčnostiach, súobmedzované na prípustnú hodnotu velkosťou paralelné zapojené-ho ochranného odporu.BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in the drawing, wherein the in-built connection of a forced commutation current inverter is shown. The interconnection of thyristors and isolating diodes to points 2 # 2, 2 »£» 2 »2 Connected via commutating chokes L1, L2, 13, L4« L5, L6, commutating capacitors C1, C2, C3 «C4, C5« C6. Protective resistors R1, R2, R3, R4, R5 are connected in parallel to commutating coils. R6. In the circuit diagram of FIG. 1, when the current is switched between the thyristors, a protective RC-circuit thyristor is connected through the thyristor, in which the current is lost. The protective RC-circuit consists of a resistive parallel to the commutating chokes and the commutating capacitors of the inverter. Overvoltages that occur when the current changes rapidly during commutation on the commutating inductances are limited to the permissible value by the size of the parallel protective resistor.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS84497A CS238527B1 (en) | 1984-01-23 | 1984-01-23 | Connecting the protective circuit against the commutation switching of the current inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS84497A CS238527B1 (en) | 1984-01-23 | 1984-01-23 | Connecting the protective circuit against the commutation switching of the current inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS49784A1 CS49784A1 (en) | 1985-04-16 |
| CS238527B1 true CS238527B1 (en) | 1985-11-13 |
Family
ID=5337166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS84497A CS238527B1 (en) | 1984-01-23 | 1984-01-23 | Connecting the protective circuit against the commutation switching of the current inverter |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS238527B1 (en) |
-
1984
- 1984-01-23 CS CS84497A patent/CS238527B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS49784A1 (en) | 1985-04-16 |
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