DE2432742A1 - Commutating supply for thyristors in motor drive - derived from separate source to ensure correct operation - Google Patents
Commutating supply for thyristors in motor drive - derived from separate source to ensure correct operationInfo
- Publication number
- DE2432742A1 DE2432742A1 DE2432742A DE2432742A DE2432742A1 DE 2432742 A1 DE2432742 A1 DE 2432742A1 DE 2432742 A DE2432742 A DE 2432742A DE 2432742 A DE2432742 A DE 2432742A DE 2432742 A1 DE2432742 A1 DE 2432742A1
- Authority
- DE
- Germany
- Prior art keywords
- supply
- thyristors
- commutating
- derived
- motor drive
- 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- Withdrawn
Links
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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/28—Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
Löschachaltung für Thyristoren in zyklisch weiterschaltenden Schalteinrichtungen Zusatz zur Anmeldung Az P 2 133 489 Besonders zur Steuerung von elektrischen Induktionsmotoren aus Gleichstronquellen der gleichgerichteten Wechsel, bzw. Drehstromnetzen werden Thyristorschaltungen benutzt, welche durch zyklische Weiterschaltung der Wicklungselemente von Troinmelankern eine Drehung der magnetischen Achse des Motors bewirken und damit den Läufer des Motors in Drehung versetzen.Quenching circuit for thyristors in cyclic switching devices Addendum to registration Az P 2 133 489 Especially for controlling electric induction motors from DC sources of rectified alternating or three-phase networks Thyristor circuits used, which by cyclic switching of the winding elements by Troinmelankern cause a rotation of the magnetic axis of the motor and thus set the rotor of the motor rotating.
In bekannten Schaltungen dieser Art sind zum Löschen der Thyristoren Kondensatoren parallel zu den Teilspulen, bzw. Teilspulengruppen der Trommelankerwicklung geschaltet, welche beim Fortschalten den vorher eingeschalteten Thyristor, bzwe das Thyristorpaar löschen.In known circuits of this type are to delete the thyristors Capacitors parallel to the coil sections or coil sections of the armature winding of the drum switched, which when switching the previously switched on thyristor, or delete the thyristor pair.
Bei niedrigen Betriebsspannungen besteht jedoch die Gefahr, daß die Löschspannung nicht ausreicht und alle Thyristoren, welche ja zwangsweise der Reihe nach gezündet werden, leitend bleiben, Mit zunehmender Drehzahl muß wie bei der Gleichstrommaschine auch die Betriebespannung gesteigert werden, wobei dann der zulässige iöschstrom überschritten wird und der Thyristor zerstört wird.At low operating voltages, however, there is a risk that the Quenching voltage is not enough and all thyristors, which are inevitably in series after being ignited, remain conductive, with increasing speed must as with the DC machine also the operating voltage can be increased, then the permissible extinction current is exceeded and the thyristor is destroyed.
Die vorliegende Erfindung sieht daher@vor, den Löschstrom aus einer vom Arbeitsstrom getrennten Stromquelle zu entnehmen. Diese Trennung des Ladestromes für die Löschkondensatoren von dem Betriebsetrom ist in der Abbildung zeichnerisch dargestellt0 Die Sammelschiene +U führt die positive Betriebsspannung und gleichzeitig die positive Löschspannung u1 für die Eingangsthyristoren El ..... Eb. Die negative LUschspannung für die Lingangsthyristoren führt die mit -u1 bezeichnete Sammelschiene. An diese Sammelschiene sind alle Ladewiderstände RL1 ..... RL8 für die Löschkondensatoren 0L1 ..... CL8 angeschlossen. Um zu vermeiden, daß die Löschströme den Weg über die Ankerwicklung nehmen, sind mit den Thyristoren, sowohl eingangs- als auch ausgangsseitig Dioden D1E ..... D8@, bzw. D1A ..... D8A vorgeschaltet.The present invention therefore provides @ before, the erase current from a to be taken from the power source separated from the operating current. This separation of the charging current for the quenching capacitors of the operating electricity is shown in the figure shown0 The busbar + U carries the positive operating voltage and at the same time the positive erase voltage u1 for the input thyristors El ..... Eb. The negative LUschvoltage for the input thyristors has the one marked -u1 Busbar. All charging resistors RL1 ..... RL8 for the quenching capacitors 0L1 ..... CL8 connected. To avoid the extinguishing currents take the path via the armature winding are connected to the thyristors, both input as well as diodes D1E ..... D8 @, or D1A ..... D8A connected upstream on the output side.
Ausgangsseitig ist die negative Saemelschiene mit -U-u2 bezeichnet. Diese Sammelschiene führt sowohl die negative Betriebsspannung, als auch die negative Löschspannung für die Ausgangsthyristoren. Die@@ positive Löschspannung führt die mit +u2 bezeichnete Schiene, welche die Löschkondensatoren für die Ausgangsthyristoren über die Ladewiderstände RLA1 RLA2 ..... RLA8 speist.On the output side, the negative Saemel rail is labeled -U-u2. This busbar carries both the negative operating voltage and the negative one Erase voltage for the output thyristors. The @@ positive erase voltage leads the with + u2 marked rail, which the quenching capacitors for the output thyristors feeds via the charging resistors RLA1 RLA2 ..... RLA8.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2432742A DE2432742A1 (en) | 1974-07-08 | 1974-07-08 | Commutating supply for thyristors in motor drive - derived from separate source to ensure correct operation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2432742A DE2432742A1 (en) | 1974-07-08 | 1974-07-08 | Commutating supply for thyristors in motor drive - derived from separate source to ensure correct operation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2432742A1 true DE2432742A1 (en) | 1976-01-22 |
Family
ID=5919983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2432742A Withdrawn DE2432742A1 (en) | 1974-07-08 | 1974-07-08 | Commutating supply for thyristors in motor drive - derived from separate source to ensure correct operation |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2432742A1 (en) |
-
1974
- 1974-07-08 DE DE2432742A patent/DE2432742A1/en not_active Withdrawn
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8141 | Disposal/no request for examination |