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The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.Tue, 25 Feb 2020 17:57:11 GMT2020-02-25T17:57:11ZFlux-Weakening Strategies for a Five-Phase PM Synchronous Machine
http://hdl.handle.net/10985/6742
Flux-Weakening Strategies for a Five-Phase PM Synchronous Machine
LU, Li; SEMAIL, Eric; KOBYLANSKI, Luc; KESTELYN, Xavier
In order to get a low cost mild hybrid system, a global objective is to keep the actual thermal engine architecture. As consequence, the current clawpole synchronous automotive generator must be replaced by a new more powerful electrical machine but with the same large speed range [0 -18000 rpm]. In the project, a power of 15 kW and a DC bus voltage of 60V have been chosen to provide a regenerative breaking at minimum cost. With this payload (250A for the DC bus current), a five-phase machine appears to be interesting because MOSFET transistors of the voltage source inverter (VSI) have not to be used in parallel configuration (only two rated 150A transistors per leg for the VSI). As the speed range is large, a flux weakening must be applied. As the five-phase drives have more degrees of freedom than three-phase ones, different flux weakening strategies can be considered. The aim of this paper is to compare one of them.
Sat, 01 Jan 2011 00:00:00 GMThttp://hdl.handle.net/10985/67422011-01-01T00:00:00ZLU, LiSEMAIL, EricKOBYLANSKI, LucKESTELYN, XavierIn order to get a low cost mild hybrid system, a global objective is to keep the actual thermal engine architecture. As consequence, the current clawpole synchronous automotive generator must be replaced by a new more powerful electrical machine but with the same large speed range [0 -18000 rpm]. In the project, a power of 15 kW and a DC bus voltage of 60V have been chosen to provide a regenerative breaking at minimum cost. With this payload (250A for the DC bus current), a five-phase machine appears to be interesting because MOSFET transistors of the voltage source inverter (VSI) have not to be used in parallel configuration (only two rated 150A transistors per leg for the VSI). As the speed range is large, a flux weakening must be applied. As the five-phase drives have more degrees of freedom than three-phase ones, different flux weakening strategies can be considered. The aim of this paper is to compare one of them.Computation of Optimal Current References for Flux-weakening of Multi-Phase Synchronous Machines
http://hdl.handle.net/10985/6741
Computation of Optimal Current References for Flux-weakening of Multi-Phase Synchronous Machines
LU, Li; ASLAN, Bassel; KOBYLANSKI, Luc; SANDULESCU, Paul; MEINGUET, Fabien; KESTELYN, Xavier; SEMAIL, Eric
Multi-phase synchronous machines are more and more used in specific applications where high power density, low bus voltage, wide speed range and fault-tolerant capabilities are required. Due to the high number of degrees of freedom, multi-phase machines are difficult to optimally operate in flux-weakening zones. This paper proposes a technique to numerically compute optimal current references that can be used for feed-forward flux-weakening techniques in order to exploit the maximum machine performances for given DC bus voltage and current limits. The proposed technique is applied to a five-phase permanent magnet synchronous machine specifically developed for an automotive application.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10985/67412012-01-01T00:00:00ZLU, LiASLAN, BasselKOBYLANSKI, LucSANDULESCU, PaulMEINGUET, FabienKESTELYN, XavierSEMAIL, EricMulti-phase synchronous machines are more and more used in specific applications where high power density, low bus voltage, wide speed range and fault-tolerant capabilities are required. Due to the high number of degrees of freedom, multi-phase machines are difficult to optimally operate in flux-weakening zones. This paper proposes a technique to numerically compute optimal current references that can be used for feed-forward flux-weakening techniques in order to exploit the maximum machine performances for given DC bus voltage and current limits. The proposed technique is applied to a five-phase permanent magnet synchronous machine specifically developed for an automotive application.