Iron Loss and Efficiency Analysis of Interior PM Machines for Electric Vehicle Applications

Zhu, Shushu; Hu, Yaohua; Liu, Chuang

doi:10.1109/tie.2017.2723859

Cited by 37 publications

(12 citation statements)

References 19 publications

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“…The available recent types of EMs used in electrified vehicles are given as follows: Researchers in [77][78][79][80][81][82][83][84][85][86][87][88] have proposed IPMSMs for HEV/EVs because of many advantages such as lower risk of magnet demagnetization and higher reliability. L. Zhang et al, [77] have studied three-phase and five-phase IPMSMs.…”

Section: • Electrical Machines (Em)smentioning

confidence: 99%

“…S. Zhu et al have studied IPMSMs in EV applications [81][82] and [86], in reference [81] they have studied electromagnetic performance of three multi-layered rotors. Finally, they have prototyped an IPMSM with a rotor consisting of three-layered magnets due to better torque density, and improved eddy-current loss and harmonics of the airgap flux density.…”

Section: • Electrical Machines (Em)smentioning

confidence: 99%

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Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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A robust design in electrified powertrains substantially helps to enhance the vehicle's overall efficiency. Robustness analyses come with complexity and computational costs at the vehicle level. The use of sensitivity analysis (SA) methods in the design phase has gained popularity in recent years to improve the performance of road vehicles while optimizing the resources, reducing the costs, and shortening the development time. Designers have started to utilize the SA methods to explore: i) how the component and vehicle level design options affect the main outputs i.e. energy efficiency and energy consumption; ii) observing sub-dependent parameters, which might be influenced by the variation of the targeted controllable (i.e. magnet thickness) and uncontrollable (i.e. magnet temperature) variables, in nonlinear dynamic systems; and iii) evaluating the interactions, of both dependent, and sub-dependent controllable/uncontrollable variables, under transient conditions. Hence the aim of this study is to succinctly review recent utilization of SA methods in the design of AC electric machines (EM)s used in vehicle powertrains, to evaluate and discuss the findings presented in recent research papers while summarizing the current state of knowledge. By systematically reviewing the literature on applied SAs in electrified powertrains, we offer a bibliometric analysis of the trends of application-oriented SA studies in the last and next decades. Finally, a numericalbased case study on a third-generation TOYOTA Prius EM will be given, to verify the SA-related findings of this paper, alongside future works recommendations.INDEX TERMS Automotive engineering, AC machines, electric vehicles, robustness, sensitivity analysis, permanent magnet machines, time series analysis, statistics.

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Section: • Electrical Machines (Em)smentioning

confidence: 99%

Section: • Electrical Machines (Em)smentioning

confidence: 99%

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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“…It can be observed that iron loss of proposed I motor increases more rapidly versus speed compared with the conventional and proposed II motors. In addition, the PM eddy current losses of the three motors exhibit similar variation trend, which results from the identical slot‐pole combination, winding layout and motor volume [17–20]. Therefore, the efficiency of the conventional motor is inferior to that of the proposed FM and PSFM motors as shown in Fig.…”

Section: Performance Analysismentioning

confidence: 99%

Design and analysis of a new partitioned stator flux‐modulation motor for direct drive applications

Zhu

Zhao

et al. 2019

IET Electric Power Applications

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In this study, in order to improve the torque density of the conventional permanent magnet (PM) motor, a flux‐modulation (FM) motor employing the magnetic gear effect is proposed. However, the FM motor has space conflict in the finite stator area, which limits the further improvement of torque density. Therefore, a new partitioned stator flux‐modulation (PSFM) motor with separated PM excitation and armature windings is artfully proposed. The main design parameters influence on the average electromagnetic torque in the proposed PSFM motor is investigated, together with the proposed FM motor. Furthermore, based on the optimal designs for the highest average electromagnetic torque in this study, the electromagnetic performances of the three motors, including back‐electromotive force performances, torque characteristics and several other performances with respect to speed are analysed by finite‐element method. Additionally in the PSFM motor, torque generation mechanism and the reduction method of torque ripple are theoretically analysed. Results show that the proposed PSFM motor exhibits 29.1% higher torque density than the FM motor and 87.6% higher than the conventional PM motor with reduced torque ripple and superior loss performance. Finally, the proposed PSFM motor is prototyped for verification.

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“…Motors with high‐torque density and high‐power density may result in excessive loss density, which subsequently bring about performance deterioration of PM. Therefore, the distribution of eddy current loss in the interior multi‐layer IPMSM is studied [13]. The sources of eddy current loss of PM are revealed with air‐gap magnetic flux harmonics and inverter time harmonics [14–16].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis and temperature field study of IPMSM for electric vehicles based on winding transformation strategy

Zhang

et al. 2020

IET Electric Power Applications

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Recently, the high‐performance and high‐reliability permanent‐magnet synchronous machine (PMSM) has attached intensive attention due to development of electric vehicles (EVs). In this study, in order to improve the capability of output torque, an improved method of interior PMSM (IPMSM) for EV based on winding transformation (WT) strategy is proposed. In the proposed method, the power electronics technology, the vector control algorithm, and the multiple‐field analysis including electromagnetic field, fluid field, and temperature field are combined. Therefore, the steady‐state and dynamic performances of WT‐IPMSM are analysed comprehensively. The accuracy of the temperature field calculation is improved by the electromagnetic–thermal iterative method. Meanwhile, the influence of pulse‐width modulation time harmonics caused by inverter on the eddy current loss of PMs and related laws is summarised. Finally, the effectiveness and feasibility of the proposed method is verified by the prototype test.

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Iron Loss and Efficiency Analysis of Interior PM Machines for Electric Vehicle Applications

Cited by 37 publications

References 19 publications

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Design and analysis of a new partitioned stator flux‐modulation motor for direct drive applications

Performance analysis and temperature field study of IPMSM for electric vehicles based on winding transformation strategy

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