The characteristics of the torque and vibration interior permanent magnet synchronous motor are affected by shape location magnets in rotor. This paper proposes optimization method with response surface methodology considering acceleration as well average ripple. In case consideration torque, is increased to 112%. vibration, ripple reduced 81% 66% without decreasing torque.

This paper proposes a new method to optimize the rotor structure in PM synchronous motors. The optimization process combines topology and constraint related shape of PMs, which accounts for manufacturing limitations. structures are designed considering two kinds stator windings types current driving methods. obtained initially assumed consist four hexahedron PMs. final shapes by full search method.

A novel magnetically levitated motor which has the ability to control five degrees of freedom was proposed. The proposed magnetic uses a radial bearing-less both translation motion and rotation, an axial bearing tilting motion. Moreover, stators were installed on inner side rotor, such that flux path are partially-shared. Therefore, is small, while achieving active control. prototype device designed using FEM. According this analysis, had sufficient force rotor within airgap ± 0.6 mm....

This paper analyzes the radial electromagnetic force of induction motors by using two-dimensional nonlinear finite-element method considering rotor current coupled with voltage equations. First, we analyze steady-state characteristics two to verify our model. Using this model, at teeth and slots clarify influence slip stator winding difference between line source a pulsewidth modulation inverter. Finally, discuss relationship measured vibration velocity.

This paper proposed a bearingless motor that has tilt control function and clarified its fundamental characteristics as magnetically suspended pump. The rotor eight permanent magnets (PMs) on each side (16 PMs in total). two stators have 12 poles with types of concentrated windings. One is for motoring axial the other control. three degrees freedom active positioning theoretical analysis operating principle showed could translational motion, inclinational, rotational movement independently....

This paper proposes a novel topology optimization method for the material distribution of electrical machines using Genetic algorithm combined with cluster and cleaning procedure. The several kinds is newly taken into account not only to form group iron air but also <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</i> -oriented, xmlns:xlink="http://www.w3.org/1999/xlink">x</i> -oriented xmlns:xlink="http://www.w3.org/1999/xlink">y</i> magnets....

A switched reluctance motor (SRM) can be one of substitutes for interior permanent magnet synchronous motors used in many industrial applications because their merits. This paper proposes an optimization method SRM fed by asymmetric bridge converter. The converter is coupled with 2-D finite element method. We optimize five geometries shape and turnon turnoff angles the using experimental design optimized produces a larger torque than that initial low speed range.

This paper proposes a novel topology optimization method to optimize the material distribution of electrical machines using genetic algorithm (GA). In proposed method, cluster and cleaning procedure are taken into account in order form group iron air. Moreover, GA is iterated with newly increased length genes. The applied stator teeth brushless dc motor reduce torque ripple without decreasing average torque. makes it easier manufacture designed device.

A novel hybrid-flux permanent-magnet (PM) generator, which has both axial flux and radial flux, is proposed. An axial-flux PM generator designed by a reluctance network method the 3-D finite element method. Using these results, this paper proposes radial-flux machine, whose main dimensions are chosen to same values as commercialized one. The proposed machine largest output power per volume. density of 9.4 times larger than that efficiencies hybrid each other, those an generators.

This paper presents the development of novel permanent magnet synchronous motors made a soft magnetic composite (SMC) material. They have 3-D flux but also hollow stator teeth, which can give reduction copper losses and motor volume. It is clarified that efficiency be improved by using SMC core instead conventional laminated core, introducing hollowed out section for winding, namely, an overhang at tip teeth. In addition, part has high iron loss finite element analysis.

This paper designs the rotor structure for two types of permanent magnet synchronous motors.The proposed optimization method combines a topology method, which uses genetic algorithm and cleaning procedure, considering ease manufacturing.The designed compressor motor an air conditioner has 32% higher average torque than that conventional motor.The larger torque/current hybrid vehicle at low output power.

A regenerative braking system (RBS) can prolong the driving distance of electric vehicles by converting mechanical energy into energy. In this paper, an RBS based on fuzzy control strategy is proposed. By analyzing characteristics all factors, under assurance safety and stability during conditions, a model was established in MATLAB/SIMULINK environment verified using simulation software Advisor2002. order to recover more energy, optimized Taguchi method, new simulated. The results show that...

Topology optimization techniques are very promising methods, because they allow one to obtain an initial conceptual structure starting with minimal information on the design object. This paper proposes a novel topology method that takes into account asymmetrical rotor structure. The phase angle of stator current is not considered in process, thanks rotor. designs permanent magnet synchronous generator. obtained rotors have several topologies by considering magnets different magnetized...

This paper presents a friction model-based control of an ultra-precision stage that is equipped with the non-resonant ultrasonic actuator (SPIDER). The SPIDER expected as suitable for stages semiconductor manufacturing electron beam which light source in next generation.At first, characteristics function position are experimentally identified. Next, measuring time variation static characteristics, on-line identification method system proposed. And then, compensation PI discussed. In addition...

This study investigates the diagnosis of not only broken bar but also end ring faults in an induction motor. The difference between bars and segments is experimentally clarified by Fourier analysis stator current. verified two-dimensional finite element (FE) that takes into consideration voltage equation ring. electromagnetic field undamaged motor with rings analyzed. Moreover, effect number on performance clarified.

This research has aimed at the control system development of a non-resonant ultrasonic motor (SPIDER)-driven precision stage. SPIDER is newly developed as an actuator to achieve positioning performance required for next generation. In this paper, friction compensation firstly realized considering integral effect controllers. Next, achieved based on adaptive observer. Moreover it experimentally verified that stick-slip phenomenon prevented environmental change by proposal technique, and quick...

This paper presents the development of an ultra-precision stage control system by introducing nonresonant ultrasonic motor (NRUSM). System identification experiments are carried out considering fundamental characteristic NRUSM. The friction, which affects accuracy positioning, is evaluated. Then relation between friction and bandwidth experimentally examined. Using frictional property as well identified model, position with compensation designed. Moreover, for its design anti-windup-based...

A double stator type axial magnetically levitated motor that has tilt motion control was proposed. An FEM analysis clarified the proposed can translation motion, inclination and rotational independently. simple experimental setup fabricated based on in order to clarify performance of its independent motion. Results impulse responses showed good levitation characteristics performance.

This paper proposed a self-bearing motor that has tilt control function and clarified its fundamental characteristics as maglev pump. The rotor eight permanent magnets on each side (sixteen PMs in total). two stators have twelve poles with types of concentrated windings. One is for motoring axial control; the other control. theoretical analysis operating principle showed could translational motion, inclinational rotational movement independently. An experimental setup was fabricated,...

This paper proposes a topology optimization method and rotor structure designs for permanent magnet synchronous generator based on this method. These described enable high output power less volume. The is genetic algorithm that considers the clusters cleaning procedure of material. optimized has in which moved direction rotation, larger than Prius type generator, spite PM

Lead batteries are used mainly for energy storage. However, they using chemicals and heavy materials, which will affect to environment badly. Therefore, clean storage systems under development magnetic bearing. eddy current causes serious rotational loss Lorentz force type bearing is proposed. Rotational losses expected be negligible due constant flux in airgap. To confirm operation of proposed bearing, an experimental setup fabricated basic characteristics measured. Rotor could run-up 3000...

This paper develops the failure diagnosis system for brushless DC motor with demagnetized permanent magnets using Lab VIEW. The Fourier analysis and Wavelet of amplitude two-phase current are useful method demagnetization magnets.

This paper shows the calculation method of several loses and motor efficiency using simple equivalent circuit, in which copper loss, eddy current hysteresis friction loss viscous inverter are taken into account. We clarify each brushless DC at different speeds output torques Microsoft-Excel. Moreover, simulation results have a good agreement with measured ones.

This paper presents a friction model-based ultra-precision stage control that introduces the non-resonant ultrasonic motor (NRUSM). At first, characteristic is experimentally evaluated as function of position. Next, model adopted for proposed continuous-pass tracking design, and then efficiency verified by positioning experiments. Finally, measuring time variation static characteristics, on-line identification method system proposed.