Field Weakening Characteristics Computed with FEM-Coupled Algorithms for Brushless AC Motors

Christian A. Rivera, Javier Poza, Gaizka Ugalde and Gaizka Almandoz
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Christian A. Rivera: Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate, Mondragon, Spain
Javier Poza: Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate, Mondragon, Spain
Gaizka Ugalde: Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate, Mondragon, Spain
Gaizka Almandoz: Faculty of Engineering, Mondragon Unibertsitatea, 20500 Arrasate, Mondragon, Spain

Energies, 2018, vol. 11, issue 5, 1-20

Abstract: Finite Element Method (FEM) analysis tools are the most adopted in the design of brushless alternating current motors due to the advantage of considering multi-physics effects with dependencies of variables such as cross-coupling, saturation and others that are not possible to be modeled analytically with high precision. During the design process designers compute operation points such as maximum torque per ampere or flux weakening characteristics that cannot be targeted directly on the FEM tool. Therefore, designers make a sweep of simulations and post-processed the data in order to obtain the results, this is repetitive particularly in the conceptual phase of the design where features of the motor are still not defined. This paper presents nine algorithms as an alternative to compute with iterative methods operation points that cannot be targeted directly on a FEM tool. The algorithms must be coupled to the FEM tool and can compute complex points such as the characteristic current and modes of operations limits within acceptable range of error and times of execution for practical purposes. Validation of the algorithms using Jython is presented with results for the three types of brushless motors (non-salient, interior permanent magnet and reluctance motor).

Keywords: brushless motor; field-weakening; permanent magnet; electric drive; finite element method; algorithm (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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