scholarly journals Modeling, Investigation, and Mitigation of AC Losses in IPM Machines with Hairpin Windings for EV Applications

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8034
Author(s):  
Mingyu Choi ◽  
Gilsu Choi
Keyword(s):  
Finite Element ◽  
Analytical Model ◽  
Parametric Study ◽  
Analytical Modeling ◽  
Design Parameters ◽  
Ac Losses ◽  
Comprehensive Investigation ◽  
Interior Permanent Magnet ◽  
Phase Arrangement ◽  
Significant Attention

Interior permanent magnet (IPM) machines with hairpin windings have attracted significant attention in EV applications owing to their low DC resistance and excellent thermal capabilities. In this paper, we present a comprehensive investigation of AC winding losses in IPM machines for traction applications, including analytical modeling, the influence of design parameters, and finite element (FE) verification. The proposed analytical model can predict the trends in AC winding losses for any number of bar conductors and slot/pole combinations. The results of the parametric study, obtained via the analytical model, are presented to examine the effects of key design parameters, such as conductor width and height, phase arrangement, and slot-per-pole-per-phase (SPP). To incorporate more practical issues into the analysis of IPM machines with hairpin windings, extensive FE simulations were conducted. The results indicated that the AC winding losses decrease with an increasing number of conductor layers and phases inside the slot.

scholarly journals A Novel Interior Permanent Magnet Machine with Magnet Axis Shifted Effect for Electric Vehicle Applications

2021 ◽  
Vol 12 (4) ◽  
pp. 189
Author(s):  
Yongsheng Ge ◽  
Hui Yang ◽  
Weijia Wang ◽  
Heyun Lin ◽  
Ya Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Basic Principle ◽  
Design Parameters ◽  
Asymmetry Ratio ◽  
Interior Permanent Magnet ◽  
Ipm Machine ◽  
Electromagnetic Characteristics ◽  
Magnet Axis

This paper proposes a novel interior permanent magnet (IPM) machine with asymmetrical PM configuration. Different from the traditional IPM counterparts, the proposed machine can perform a magnet axis shifted (MAS) effect. The magnet axis is shifted towards the reluctance axis so that a higher resultant torque capability can be obtained. Firstly, the configuration and the basic principle of the proposed machine are described. The design parameters are optimized to improve the torque capability, and the effect of the PM asymmetry ratio on the torque performance is then evaluated in detail. In addition, the major electromagnetic characteristics of the optimized machine are investigated and compared with those of the Prius 2010 IPM machine by finite element method (FEM). The results demonstrate that the proposed asymmetrical PM configuration can achieve the torque improvement due to the MAS effect.

scholarly journals Finite Element Analysis of the Effect of Currents on the Dynamics of a Moored Flexible Cylindrical Net Cage

2021 ◽  
Vol 9 (2) ◽  
pp. 159
Author(s):  
Zhongchi Liu ◽  
Sarat Chandra Mohapatra ◽  
C. Guedes Soares
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Numerical Model ◽  
Analytical Model ◽  
Structural Response ◽  
Wave Theory ◽  
Design Parameters ◽  
Element Analysis ◽  
Net Cage ◽  
Comparison Of The Results

A numerical model associated with wave–current interactions with a moored flexible cylindrical cage was developed based on the finite element method. An analytical model was formulated under the linearised wave theory and small structural response, and a semi-analytical solution was obtained using the Fourier Bessel series solution and least squares approximation method, along with a matching technique. The numerical results from the finite element analysis of the horizontal displacements for different design parameters under a uniform current were compared with the analytical model solutions. It was seen that they had a good level of agreement with their results. The effects of different current speeds and time on the cage shapes were analysed from the finite element results. Further, the mooring forces on the flexible cage for different values of the cage height and cage radius were also presented. The comparison of the results indicated that the numerical model results could be used with confidence in the design of a flexible cylindrical net cage for applications to offshore aquacultures.

scholarly journals Calculation of airgap function and inductance using analytical modeling of rotor magnetic characteristics of an IPM motor under loaded condition

2021 ◽  
Author(s):  
BINITA NANDA ◽  
Praveen Kumar
Keyword(s):  
Optimal Design ◽  
Energy Conversion ◽  
Analytical Model ◽  
Motor Performance ◽  
Analytical Modeling ◽  
Design Parameters ◽  
Magnetic Characteristics ◽  
Design Phase ◽  
Initial Design ◽  
The Relationship

<div>This paper proposes an analytical model to calculate the airgap function and inductance, which can be used to get an optimal design during the initial design phase. It investigates the relationship between the design parameters of the rotor and the motor performance.</div><div><br></div><div>This paper is under review in IEEE Transactions on Energy Conversion.<br></div>

scholarly journals The Analytical Comparative Analysis of Electromagnetic Characteristics of Four Typical Radial Flux Permanent Magnet Eddy Current Couplers

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8407
Author(s):  
Yibo Li ◽  
Jiacai Huang ◽  
Fangzheng Gao ◽  
Zhiying Zhu ◽  
Yufei Han ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Analytical Model ◽  
Eddy Current ◽  
Analytical Modeling ◽  
Magnetic Circuit ◽  
Radial Flux ◽  
Higher Power ◽  
Interior Permanent Magnet ◽  
Fea Simulation ◽  
Electromagnetic Characteristics

The analytical model of a permanent magnet eddy current coupler (PMECC) is mainly used for evaluation of its characteristics and the initial optimization of design. Based on the equivalent magnetic circuit method, this paper carries out analytical modeling for four typical PMECCs composed of surface-mounted and interior permanent magnet, slotted and non-slotted conductor rotors, which provides a theoretical basis for the subsequent research in this paper. The basic electromagnetic characteristics of the PMECCs are investigated by the established analytical model. Simultaneously, the analytical results about permeance, flux density, torque and power are verified by FEA simulation. The analysis results show that the slotted CR will obtain a much higher power density, and the iron loss mainly exists in the CRs. In addition, the analytical and FEA results agree well, which proves the reliability of the proposed, nearly unified analytical model.

scholarly journals Analysis Study of Hybrid Magnetic Equivalent Circuit of IPMSM

2021 ◽  
Author(s):  
In-Soo Song ◽  
Byoung-Wook Jo ◽  
Ki-Chan Kim
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Equivalent Circuit ◽  
Design Parameters ◽  
The Finite Element Method ◽  
Magnetic Equivalent Circuit ◽  
Interior Permanent Magnet ◽  
Equivalent Circuit Method ◽  
Element Method

Recently, the demand for electric vehicle is increasing worldwide due to eco-friendly policies and stricter emission regulations. As a traction motor for electric vehicle, interior permanent magnet synchronous motors are mainly used. For the design of the interior permanent magnet synchronous motor, the magnetic equivalent circuit method, which is a method of lumped constant circuit, and the finite element method, which is a method of distributed constant circuit, mainly are used. Magnetic equivalent circuit method is useful for simple design through fast and intuitive parameters, but it cannot derive the distribution of magnetic field. The finite element method can derive an accurate magnetic field distribution, but it takes a long time to analyze and it is difficult to analyze intuitive design parameters. In this paper, magnetic equivalent circuit method and Carter coefficient are mixed for rotor structure design. This design method will be called the hybrid magnetic equivalent circuit method. Intuitive design parameters are derived through this hybrid magnetic equivalent circuit method. We will derive the Air gap flux density distribution according to rotor shape, no-load induced voltage, and cogging torque, and compare and verify it with the finite element method.

Evaluation of Design Parameters for Leadless Chip Resistors Solder Joints

1995 ◽  
Vol 117 (2) ◽  
pp. 94-99 ◽  
Author(s):  
Edward Jih ◽  
Yi-Hsin Pao
Keyword(s):  
Finite Element ◽  
Analytical Model ◽  
Solder Joints ◽  
Thermal Hysteresis ◽  
Rapid Assessment ◽  
Strain Range ◽  
Design Parameters ◽  
Thermal Reliability ◽  
Element Analysis ◽  
Creep Fatigue

Failures in electronic packaging under thermal fatigue often result from cracking in solder joints due to creep/fatigue crack growth. A nonlinear, time-dependent finite element analysis was performed to study the effect of critical design parameters on thermal reliability of leadless chip capacitor or resistor solder joints. The shear strain range based on thermal hysteresis response was used to study the sensitivity of various parameters, such as solder stand-off height, fillet geometry, Cu-pad length, and component length and thickness. The results were used as guidelines for designing reliable solder joints. In addition, an analytical model for the solder joint assembly was derived. It can be used .as an engineering approach for rapid assessment of large numbers of design parameters. The accuracy and effectiveness of the analytical model were evaluated by comparing with finite element results.

scholarly journals Metallic Ribbon-Core Sandwich Panels Subjected to Air Blast Loading

2020 ◽  
Vol 10 (13) ◽  
pp. 4500
Author(s):  
Mahmoud Abada ◽  
Ahmed Ibrahim
Keyword(s):  
Finite Element ◽  
Parametric Study ◽  
Sandwich Structure ◽  
Sandwich Structures ◽  
Sandwich Panels ◽  
Blast Loading ◽  
Element Model ◽  
Design Parameters ◽  
Finite Element Program ◽  
Back Plate

Sandwich structures provide a quite promising solution for blast alleviation techniques owing to their lightweight, high strength, and impressive energy absorption capabilities relative to solo metallic plates with equivalent density. The ability of the sandwich structure to withstand blast loading relies on its core topology. This paper numerically investigates the effectiveness of using ribbon shapes as an innovative core topology for sandwich structures subjected to blast loading. The hydro-code program (Autodyn) supported by the finite element program (ANSYS) is adopted to study the dynamic response of various sandwich panels. The accuracy of the finite element (FE) models were verified using available experimental results for a field blast test in the literature. The results show that the developed finite element model can be reliably exploited to simulate the dynamic behavior of the sandwich panels. The trapezoidal (TZ) and triangular (T) corrugated core topologies were selected to highlight the blast-resistant performance of the new ribbon core topology. Applying the ribbon topology to the traditional corrugated core topologies improved their blast performance. The facing front-plate’s deflection of the trapezoidal corrugated ribbon core sandwich structure (TZRC) has been improved by 45.3% and by 76.5% for the back-plate’s deflection, while for the triangular ribbon corrugated core (TRC), the front plate’s defection has been enhanced by 69.3% and by 112.1% for the back plate. The effect of various design parameters on the blast behavior of the Ribbon-Core Sandwich Panels (RCSPs) was investigated. A parametric study was conducted to evaluate performance indicators, including energy dissipated through plastic deformation and plate deflections. Finally, based on the parametric study, the results of this paper were recommended to be used as a guide for designing metallic ribbon sandwich structures with different protection levels.

scholarly journals Calculation of airgap function and inductance using analytical modeling of rotor magnetic characteristics of an IPM motor under loaded condition

2021 ◽  
Author(s):  
BINITA NANDA ◽  
Praveen Kumar
Keyword(s):  
Optimal Design ◽  
Energy Conversion ◽  
Analytical Model ◽  
Motor Performance ◽  
Analytical Modeling ◽  
Design Parameters ◽  
Magnetic Characteristics ◽  
Design Phase ◽  
Initial Design ◽  
The Relationship

<div>This paper proposes an analytical model to calculate the airgap function and inductance, which can be used to get an optimal design during the initial design phase. It investigates the relationship between the design parameters of the rotor and the motor performance.</div><div><br></div><div>This paper is under review in IEEE Transactions on Energy Conversion.<br></div>

scholarly journals Calculation of airgap function and inductance using analytical modeling of rotor magnetic characteristics of an IPM motor under loaded condition

2021 ◽  
Author(s):  
BINITA NANDA ◽  
Praveen Kumar
Keyword(s):  
Optimal Design ◽  
Energy Conversion ◽  
Analytical Model ◽  
Motor Performance ◽  
Analytical Modeling ◽  
Design Parameters ◽  
Magnetic Characteristics ◽  
Design Phase ◽  
Initial Design ◽  
The Relationship

<div>This paper proposes an analytical model to calculate the airgap function and inductance, which can be used to get an optimal design during the initial design phase. It investigates the relationship between the design parameters of the rotor and the motor performance.</div><div><br></div><div>This paper is under review in IEEE Transactions on Energy Conversion.<br></div>

scholarly journals Analytical Modeling of the Temperature Using Uniform Moving Heat Source in Planar Induction Heating Process

2019 ◽  
Vol 9 (7) ◽  
pp. 1445 ◽  
Author(s):  
Feng Li ◽  
Jinqiang Ning ◽  
Steven Liang
Keyword(s):  
Finite Element ◽  
Heat Source ◽  
Finite Element Simulation ◽  
Analytical Model ◽  
Induction Heating ◽  
Analytical Modeling ◽  
Heating Process ◽  
Moving Heat Source ◽  
Temperature Prediction ◽  
Element Simulation

The planar induction heating possesses more difficulties in industry application compared with traditional spiral induction coils in mostly heat treatment processes. Numerical approaches are adopted in the power distribution and temperature prediction during the induction heating process, which has a relatively low computational efficiency. In this work, an analytical calculation model of the planar induction heating with magnetic flux concentrator is investigated based on the uniform moving heating source. In this model, the power density in the surface of the workpiece induced by coils is calculated and applied into the analytical model of the temperature calculation using a uniform moving heat source. Planar induction heating tests are conducted under various induction coil parameters and the corresponding temperature evolution is obtained by the infrared imaging device NEC R300W2-NNU and the thermocouples. The final surface temperature prediction is compared to the finite element simulation results and experimental data. The analytical results show a good match with the finite element simulation and the experimental results, and the errors are in reasonable range and acceptable. The analytical model can compute the temperature distribution directly and the computational time is much less than the finite element method. Therefore, the temperature prediction method in this work has the advantage of less experimental and computational complexity, which can extend the analytical modeling methodology in induction heating to a broader application.

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