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The concentrated winding is the common winding method used in the conventional permanent magnet flux reversal machines (FRPM). In this paper a distributed winding for FRPM as a generator is proposed. To investigate the advantages of the proposed machine a comparative analysis of both the distributed and the concentrated winding for FRPM is performed. The output voltage waveforms of both machines are...
Side reservoir can improve electromigration (EM) lifetime of copper interconnects. In this work, finite element method (FEM) simulations for interconnect structures with cathode end-of-line reservoir and side reservoir respectively have been conducted to study the side reservoir effects on EM lifetime. It is demonstrated that side location is most likely to have void failure and side reservoir can...
The use of linear alternators are increasing daily with the usage in hybrid vehicles, Stirling power engines, free piston engines and other renewable energy technologies. Detailed study on the usage of radial or axial magnets in the linear alternator has not been performed so far. This paper attempts to study the effects of the radial magnets and axial magnets under the same conditions using ANSYS...
In order to calculate the copper loss calculation with coil end effect in a practical computation time, the zooming method, which is one of the model reduction methods, is applied to the analysis of an three-phase synchronous motor. Moreover, the faster calculation technique is proposed for the analysis of three-phase synchronous motor. The copper loss of litz wire with a coil end can be calculated...
A three-dimensional finite element model of miniature circuit breaker is established. The steady state temperature field is obtained by the method of electrothermal coupling, and the mechanism of overload protection is analyzed. The influence of wire size on the temperature of bimetal is studied. A simple and effective method to reduce the influence of external wire size is presented. The influence...
Insulated gate bipolar transistor (IGBT) operates at high current, high power and repeated shock current conditions. Joule heating induced during high current conditions, subsequently raising the temperature of the IGBT module. In this paper, we carried out the DC power cycling test with the 200 A current condition. The temperature distribution and the temperature change process of the whole IGBT...
The parasitic parameters in the power module have a negative effect on switching losses and dynamic characteristics. With the rapid development of integrated circuit technology, the high current, high frequency and high pressure working environment put forward higher requirements for the switching circuit delay, reliability and power consumption. The rational layout of the power module is the key...
Induction motor is the most popular load in the transportation systems like Hybrid vehicle, Traction and Propeller. Now-a-days most of the researches are done on hybrid vehicle. It is very important to study about the cost effective, efficiency and quality on induction motor performance. For easy transportation purpose the weight of the motor is low and similarly for the performance of the motor the...
This study presents a method to use copper nodules to induce dielectrophoresis force. It can be applied in biomedical cell capture. The capture electrode is a 3D interdigitated microelectrode and also can be used in electrical cell impedance measurement. No additional procedural is needed to form copper nodules. The process is easy, convenient, and the same as a normal 3D electrode manufacture.
We have performed the solution of the non-stationary thermal conductivity problem for a single-core copper cable with PVC-plastic insulation. The necessity of solving this problem is due to the strong dependence of the insulation properties on temperature. The solution is made numerically by the finite element method. The problem is solved in a two-dimensional formulation. Flat triangular finite elements...
A three-dimensional mathematical modeling and an analysis of the magnetic and temperature fields distribution in a lined inductor of melting-holding furnace for copper melting have been made. The analysis has been made based on the following objects properties: a complex geometry of the system; a non-linear conductivity dependence on the copper temperature; ferromagnetic properties of the iron magnetic...
A novel and systematic methodology to predict the warpage of extremely thin packages is proposed. The geometrical and material inhomogeneities of both die and substrate are included in the prediction methodology. The inhomogeneous thermo-mechanical properties of dies due to the thermal incompatibility between silicon substrate and active/passive layers are inversely extracted from the Shadow Moiré...
Finite Element simulations are often used to study the reliability of solder joints subjected to thermal cycling. Packaging configurations are becoming more complex to accommodate better functionality and performance. Increased complexity leads to several challenges for FE models including difficulties modeling thin layers and interfaces, as well as keeping the total numbers of nodes and elements...
This paper presents the detailed loss calculation of bar-wound Permanent Magnet Synchronous Machines(PMSMs) using high speed parallel processing Finite Element Analysis (FEA) and the analysis of the leakage flux. In advanced machine design, the bar-winding is widely used to increase the output power density. The one of issues using the bar-winding is that the copper loss increases due to the eddy...
The objective of this work is to develop a combinedmode I and mode III characterization method and to use thistest method to study Copper (Cu) / Epoxy mold compound(EMC) interfacial delamination from near-mode I to nearmodeIII global loading. Using the developed test method, aseries of experiments are done with varying loading modeconditions from near-mode I to near-mode III and successfuldelamination...
This study was aimed at quantifying critically relevant topics about the influence of intermetallic compounds (IMC) within power electronics reliability such as the influence of soldering profile on the growth rate of IMC in large area solder joints, estimation of IMC thickness during non-isothermal ageing and the impact of IMC thickness on reliability. To this end, test samples were soldered using...
The performance of permanent magnet eddy current speed-control device is closely related to the material properties of each component. In view of different permanent magnets, a three-dimensional finite element transient model of 500kw permanent magnet eddy current speed-control device is established. The finite element method is used to calculate torque, loss and output power of the permanent magnet...
Package delamination is a common problem in electronic packaging, and this study focused on the low-profile fine-pitch ball grid array (LFBGA) and plastic ball grid array (PBGA) package of composite and metal bonding and bonding mechanism to decrease the occurrence of delamination. In LFBGA, the physical and chemical properties were discussed by roughness and pure copper/nickel bonding experiment...
In the present paper, the calculation about power transfer efficiency for non-contact charger with rectangular voltage source was attempted. The ac resistances of the sending and receiving coils were set to the calculated values in the case of which the source voltage shape was sinusoidal wave and the operating frequency was 20 kHz. The calculation results were compared with the experimental results...
Nowadays, with the increasing concerns on global environment pollution and energy security, electric vehicles (EVs) have been regarded as the potential to offer a solution for transportation [1].
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