Self-commutated inverter for async. machine operation - has three=phase bridge of distribution diodes, from whose star points each leads freewheel circuit to DC voltage source poles

Self-commutated inverter for async. machine operation - has three=phase bridge of distribution diodes, from whose star points each leads freewheel circuit to DC voltage source poles

The three-phase bridge consists of distribution diodes and associated commutating capacitors and can be quenched. A commutating capacitor is associated to the quenchable diodes of both bridge halves. Each commutating capacitor is corrected to one pole of a d.c. voltage source via a quenching thyrist...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BEZOLD,KARL-HEINZ, HARMS,HARM-DIEDRICH
Format: Patent
Sprache:eng ; ger
Schlagworte:
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
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Beschreibung
Zusammenfassung:The three-phase bridge consists of distribution diodes and associated commutating capacitors and can be quenched. A commutating capacitor is associated to the quenchable diodes of both bridge halves. Each commutating capacitor is corrected to one pole of a d.c. voltage source via a quenching thyristor. Two groups of distribution diodes in star connection are each connected in the same direction and in parallel to the three motor phases, with the individual groups being connected in parallel. The star points are each connected, via a further quenching thyristor with the free terminal of the associated commutating capacitor. From the star points of the distribution diodes (11a - c, 12a - c) leads an additional free wheel circuit each to both poles of the d.c. voltage source (8). The free wheel circuit comprises change-over oscillation diodes (25,26).