Investigation on Operational Envelops and Efficiency Maps of Electrically Excited Machines for Electrical Vehicle Applications

Chu, W. Q.; Zhu, Z. Q.; Zhang, Jian; Liu, Xu; Stone, D.A.; Foster, M. P.

doi:10.1109/tmag.2014.2359008

Cited by 72 publications

(21 citation statements)

References 32 publications

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“…The advantage of the DCEFSM is this extended speed range [21]. However, the straightforward field weakening method of decreasing the field current in dc-winding has poor performance in this motor [22]. At the same time, in accordance with the assumption 3, it will influence the accuracy of the model.…”

Section: Control Strategymentioning

confidence: 96%

Co-Energy-Based Lookup Table Model for DC-Excited Flux-Switching Motor: Study at Vehicle Level

Mongellaz

Sellier

Chishko³

et al. 2015

2015 IEEE Vehicle Power and Propulsion Conference (VPPC)

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This paper concerns an initial simplified steadystate method to start to evaluate the behavior of a dc-excited fluxswitching motor at a steady-state, or slow dynamic, vehicle level. Starting from a simplified finite-element motor representation, a two-dimensional co-energy lookup table model is extracted. Then, a model reduction is performed to create steady-state loss maps of the system parts at different torque-speed points, considering the simplified losses. These loss maps are integrated into an electric vehicle model, where a discussion is introduced to illustrate the limitation of using efficiency maps. Finally, to determine an average efficiency of the electrical powertrain during drive cycles, a fast simplified steady-state calculation is performed.

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Section: Control Strategymentioning

confidence: 96%

Co-Energy-Based Lookup Table Model for DC-Excited Flux-Switching Motor: Study at Vehicle Level

Mongellaz

Sellier

Chishko³

et al. 2015

2015 IEEE Vehicle Power and Propulsion Conference (VPPC)

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“…Therefore, it is essential to compare the efficiency performance of the two hybrid VFM machines. The efficiency map of the VFM machine is calculated, in which the iron losses and copper losses with different currents are swept based on FE method, and the optimum efficiency at each operation point is identified [28]. Since the magnetization state of the VPM will be regulated in the VFM machine to perform the appropriate PM flux, and thus, low copper loss and low iron loss are obtained, the different VPM magnetization states should be integrated together for the maximum efficiency.…”

Section: G Efficiency Characteristicsmentioning

confidence: 99%

Comparative Study on Variable Flux Memory Machines With Parallel or Series Hybrid Magnets

Hua

Zhu

Pride³

et al. 2019

IEEE Trans. on Ind. Applicat.

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Variable flux memory (VFM) permanent magnet (PM) machines exhibit an additional degree-of-freedom for control, i.e. PM magnetization state, and thus excellent flux controllability. Moreover, the hybrid PM topologies having variable PM (VPM) with low coercive force and constant PM (CPM) with high coercive force at the same time, are employed to improve the torque density and the flux controllability. The parallel and series connections between the two different kinds of PMs are both feasible. Based on equivalent magnetic circuits, two-dimensional (2-D) finite element (FE) analyses and experiments, the VFM machines with these two connection types are investigated and compared in this paper. The results reveal that the VPM with series connected CPM is beneficial for more stable working point and higher torque density. A pair of VFM prototypes with parallel and series hybrid PMs respectively are manufactured and tested to validate the analyses.

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“…Due to the satisfactory torque quality and wide MS control range, the parallel-type PS-SFMM is selected for the following efficiency investigation [19]. The efficiency maps under different MSs are plotted in Fig.…”

Section: E Efficiency Mapsmentioning

confidence: 99%

Comparative Study of Partitioned Stator Memory Machines With Series and Parallel Hybrid PM Configurations

et al. 2019

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orcid.org/0000-0001-7175-3307 et al. (3 more authors) (2019) Comparative study of partitioned stator memory machines with series and parallel hybrid PM configurations. IEEE Transactions on Magnetics. In this paper, the partitioned stator (PS) structure is extended to variable-flux memory machines, forming two newly emerged PS switched-flux memory machines (PS-SFMMs) with series and parallel hybrid magnet configurations. From the perspective of geometry, both two PS-SFMMs share identical outer stator and rotor segments, while two different types of permanent magnet (PM) arrangements are employed in the inner stationary part. Thus, the developed machines can inherent the geometric separation of the armature winding and PM excitations from the PS design, thus achieving acceptable torque capability, and excellent air-gap flux control. A comparative study between PS-SFMMs with series and parallel structures is established. First, the topologies and operating principle are introduced, respectively. In addition, the design tradeoffs and PM sizing of the two PS machines are revealed and optimized with a simplified magnetic circuit model. Then, the electromagnetic characteristics of PS-SFMMs with different magnetic circuits are investigated and compared with the finite-element (FE) method. The FE results are validated by the experiments on a parallel prototype. Index Terms-Hybrid permanent magnet (PM), memory machine (MM), parallel magnetic circuit, partitioned stator (PS), series magnetic circuit.

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Investigation on Operational Envelops and Efficiency Maps of Electrically Excited Machines for Electrical Vehicle Applications

Cited by 72 publications

References 32 publications

Co-Energy-Based Lookup Table Model for DC-Excited Flux-Switching Motor: Study at Vehicle Level

Co-Energy-Based Lookup Table Model for DC-Excited Flux-Switching Motor: Study at Vehicle Level

Comparative Study on Variable Flux Memory Machines With Parallel or Series Hybrid Magnets

Comparative Study of Partitioned Stator Memory Machines With Series and Parallel Hybrid PM Configurations

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