This paper proposes a hybrid algorithm based on the genetic (GA) and evolution strategy (ES) for electromagnetic optimization problem. The GA is not good enough at times in searching optimal solution from view point of convergence speed quality, while ES has risk being trapped local minimum. composed order to make up these defects. First, we reached vicinity using GA. Then, used find accurate solution. switching can be main issue, which also resolved this paper. performance accuracy are...

In this paper, we proposed new harmonic iron loss calculation methods for electrical machines. The based on the concept of variable coefficients due to their flux density and frequency estimate in time domain domain. order verify performance method, calculated with conventional methods. Then, estimated losses were compared experimental data. It was clarified that are more effective than at high-speed operation. Based these newly methods, analyzed machine electric vehicle (EV) according its...

In this paper, we investigated rotor iron loss of interior permanent magnet synchronous machine (IPMSM), which has distributed armature windings. order to study the with effect slot-pole combination, two machines for high-speed operation such as electric vehicle were designed. One is fractional slot winding and other conventional one. analysis, developed a new model electrical operation. The calculated was compared experimental data. It clarified that proposed method can estimate effectively...

This paper presented the loss characteristics of interior permanent-magnet machines (IPMSM) for a fuel-cell electric vehicle. In order to study machine, one prototype machine having 100 [kW] was designed. analysis, consider harmonic magnetic field and rotational variation flux vectors in core effectively, we proposed new iron-loss calculation method based on adaptive coefficients. To verify performance method, calculated no-load iron an IPMSM with conventional methods. Then, estimated losses...

The Thomson coil actuator (TCA) is a useful switch due to its simple structure and rapid completion time. However, research on the TCA not widely available. Research has been focused basic working principles characteristic analysis of TCA. To address these problems, an method design for are proposed in this paper. Concretely, using numerical analytical critical variables inspected detail research. correctness methods usefulness high speed verified through experiment.

The solenoid magnetic actuator has been widely used as an for MS (magnetic switch). Thus, conventional MSs continuously consume electrical power to maintain a closed state. To address this problem, innovative structure which uses permanent magnet generate holding force in the state without is suggested paper. Further, dedicated opening operation and closing by means of its force. In other words, eco-friendly proposed research. However, critical problem that, if unexpected external applied...

The characteristics analysis of an electric machine requires the finite-element method. Hence, a large amount computation occurs in design process to take into account uncertainties as manufacturing tolerances. In this paper, efficient and useful multimodal optimization algorithm using kriging surrogate model is proposed for robust machine. However, conventional (CK) method has memory problem multi-dimensional due enlarged correlation matrix. Thus, sub-domain (SDK) strategy improved Latin...

This paper proposes an improved particle swarm optimization (PSO) process to design a high-performance compact ultrawideband (UWB) filter. The filter consists of one-cell composite right- and left-handed-transmission line (CRLH-TL) resonator, stepped impedance (SI), two spurlines. CRLH-TL resonator has size but performs wide passband filtering. One SI spurlines are employed reject both the harmonics outside UWB wireless local area network (WLAN) (5.15-5.825 GHz) band. PSO conventional with...

Due to the continuous energy consumption in a closing coil for maintenance of closed state, conventional solenoid type MC has serious problems such as inefficient consumption, welding contacts, vibration, and noise. To address these problems, an advanced using permanent magnet, inter-locking system, guiding structure is proposed named MCPIG (magnetic contactor structure) this paper. Analysis method design strategy are research. Through examining experimental data prototype, practicality...

This paper discusses the development of a new optimization algorithm for DC motor design. In principle, utilizes mixed method that consists genetic algorithms in conjunction with direct search method. The are used locating global optimum region while is to achieve objective function convergence. order validate effectiveness, has been applied an actual motor. Field and torque characteristics computed using finite element principle virtual work, respectively.

The contact mechanism should be analyzed for an estimation of the performance a traveling wave ultra-sonic motor (TWUSM), because operation this type depends on frictional force between rotor and stator. However, nonlinearity TWUSM makes it difficult to proposed proper model, characteristic analysis method optimal design method. To address these problems, using cylindrical dynamic model (CDCM), analytical method, numerical evolutionary strategy algorithm (ESA) is in research. feasibility...

Optimal design process of multilayer buried magnet synchronous machine combined with mechanical and thermal analysis is presented in this paper. Fast stress method using electromagnetic information explained detail. Through the optimization result comparison experimental data, validity proposed verified.

A design sensitivity analysis for optimal shape of electromagnetic devices is described. The explicitly derived two-dimensional systems by using implicit differentiation and direct boundary element methods. proposed applied to the designs yoke an electromagnet magnetic pole, desired distributions induction in air-gap are then obtained.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

An improved design of a compact ring-slot type antenna for rectenna system, which has superior and controllable property in size, directivity, harmonics suppression is proposed. The conventional modified with the slits side-cuts to control resonant frequency band, creation circular polarization. Seven parameters are selected from primary research optimized using particle swarm optimization method numerically manipulated fitness function. proposed shows desirable performances simulation also...

A novel light energy scavenging system is presented, which employs a MEMS switch as the gate driver of MOSFET in power management circuit, for ultra-low condition. Measurements show that, 5lx illumination condition, wireless temperature sensor node powered by palm-size solar cell array can autonomously transmit RF data to receiver 20 m away every 9 minutes. The experimental results demonstrate most sensitive ever reported, and offer great potential realising practical self-sustaining devices.

This paper deals with a method for obtaining the transient internal voltage distribution of transformer. It is essential to consider frequency-dependent effects capacitance, inductance, and resistance in order analyze characteristics Frequency-dependent inductance are obtained from an analytical values match well experimental ones. The numerical results transformer show good agreement literature.

In this paper, the finite element algorithm is implemented to calculate field and temperature variation in high voltage direct current cylindrical cables. Such cables contain joins interconnects which result physical discontinuities where strong fields may be present, resulting dielectric breakdown during power switching events. To minimize possibility of catastrophic failure, design sensitivity analysis applied determine a geometry that minimizes within region interest. Since material...

A magnetic contactor (MC) using permanent magnets has a critical problem. When an unintended external force, such as earthquake or shock, is applied to the mover, MC can be closed unexpectedly. To address this problem, inter-locking system proposed for magnet (PM) type in research. Hence, reliability of PM improved significantly via system.

In this paper, we report on our study of a Nano Positioning Actuator (NPA), which uses an impact/inchworm mechanism. Many kinds similar precise positioning actuators, use the same working mechanism, are being and have been proposed by many researchers for several decades. But, characteristic analysis design method NPA has not yet. Also, methods machines were approximate ineffective. Hence, present in paper methodology using 3D FEM combined with analytic method, shedding light complex taking...

In this paper, a finite element algorithm to calculate field and temperature variation in high voltage direct current (HVDC) cables is presented. The material properties these systems demonstrate both dependencies. defining differential equations are therefore nonlinear, requiring an iterative technique accurately determine the physical properties. A three dimensional domain considered