Reduced Switch-Count Six-Phase AC Motor Drive Systems Without Input Reactor |
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Authors: | Brandao Jacobina C Soares de Freitas I Ricarte da Silva C Beltrao de Rossiter Correa M Cabral da Silva ER |
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Affiliation: | Univ. Fed. de Campina Grande, Campina Grande; |
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Abstract: | In this paper, two reduced switch-count six-phase ac motor drives are investigated. The first configuration considered has six legs (configuration 6L), and the second one has five legs (configuration 5L) and uses the capacitor dc-link midpoint connection. Both configurations operate without input reactors and provide both bidirectional power flow and power-factor control. Both 60 and 30 six-phase induction-machine windings are employed. Operating principles and control strategies for the topologies are presented. The proposed configurations are compared with the full-bridge (nine legs) and the half-bridge (six legs) topologies, which use the capacitor dc-link midpoint connection. These drive systems are suitable for applications where the size of the system is a critical factor. Experimental and simulation results are presented. |
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