Design of a High-Speed ferrite-based Brushless DC Machine for electric vehicles

Abstract

In the present paper an analytic procedure for the preliminary design of a High-Speed ferrite-based Brushless DC Machine (HS-BLDC) has been proposed. In particular, a mechanical and electromagnetic modeling has been developed in order to take into account their mutual influence in the definition of the geometry of the electrical machine. In addition, suitable design targets have been imposed in accordance with electric vehicle application requirements. Hence, several mechanical and electromagnetic constraints have been introduced in order to comply with high-speed operation, preventing demagnetization issues of ferrite magnets as well. Subsequently, an HS-BLDC characterized by an inner rotor configuration has been designed in accordance with the proposed methodology. The analytical procedure and the corresponding results have been reported and validated by means of Finite Element Analyses (FEAs), highlighting the effectiveness of the proposed configuration and design solutions.

Design of flux‐weakening space vector control algorithms for permanent magnet brushless DC machines on suitable synchronous reference frames

“…A simulation study has been carried out in the MATLAB-Simulink environment at the aim of assessing the effectiveness of the proposed FW-SVC designed on the novel φτ synchronous reference frame. Therefore, reference is made to the high-speed PMBDCM presented in [47], which requires a very wide CPSR and, thus, represents an ideal case study for testing flux-weakening capability of the proposed control system. An overview of the overall simulation setup is shown in Fig.…”

“…Therefore, a demagnetising current loop has been designed in [46] by means of a voltage follower PI regulator [34]; the latter processes the voltage deficit detected on the DC-link at the aim of determining the most suitable reference demagnetising current profile beyond the rated speed. Hence, in [46], a flux-weakening SVC (FW-SVC) is applied for driving the high-speed PMBDCM designed in [47], in comparison with a conventional current commutation control and with the SVC already proposed in [25]. However, although the FW-SVC proposed in [46] shows improved performances compared to the other two PMBDCM control approaches in terms of both constant-power speed range (CPSR) and maximum speed, the latter are still quite far from the targets foreseen in [47].…”

“…Subsequently, PMBDCM performance assessment is carried out through a simulation study, whose results are presented and discussed extensively. In particular, simulations refer to the high-speed PMBDCM designed in [47], which is driven by SVC and by both the FW-SVCs alternatively for comparison purposes.…”

Iron-Loss Modeling With Sensorless Predictive Control of PMBLDC Motor Drive for Electric Vehicle Application

“…The proposed disturbance observer estimates the rotor position along with the rotor speed by considering iron loss effect. The torque ripple minimization of PMBLDCM based EVs has received considerable attention from researchers to ensure a smooth and convenient ride for passengers [19]. Various closed-loop control techniques, such as vector control [20], [21], direct torque control [22], Fourier series based control [23], are available in literature to reduce the torque ripple of PMBLDCM.…”

Método de estimação de velocidade e posição rotórica da máquina BLDC a partir de uma estrutura PSD+PLL

“…Dentre as diversas tecnologias de máquinas elétricas estudadas para o emprego em sistema de tração em veículos elétricos/híbridos, a BLDC (do inglês brushless direct current) tem recebido grande destaque e utilização O presente trabalho foi realizado com apoio da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior -Brasil (CA-PES/PROEX) -Código de Financiamento 001. Os autores também gostariam de agradecer ao INCT-GD e as agências de fomento (CNPq Projeto 422026/2016-6, CNPq 465640/2014-1, CA-PES 23038.000776/2017-54 e FAPERGS 17/2551-0000517-1) (Naseri et al, 2017;Shah et al, 2010;Damiano et al, 2017). Essa máquina caracteriza-se por possuir uma força contra-eletromotriz (FCEM) trapezoidal, permitindo uma elevada densidade de potência e menor complexidade na sintetização das correntes (Krishnan, 2009).…”