Application of permanent magnets bonded by rubber is still growing, especially in the automotive industry.Magnetic and mechanical properties can be tailored a production's technology magnet's composition.Permanent are produced method called calendaring.Physical depend on type amount hard magnetic powder mixture with rubber.Anisotropic strontium ferrite spherical isotropic Nd-Fe-B alloy were used research.The results measurements show that an increasing Shore hardness increase whereas tensile...

This study focuses on a class of 3-phase Switched Reluctance Motor. The aim the paper is to optimize torque and iron losses as function geometry. To enhance efficiency motor, procedure automated optimal design adopted. Two materials are evaluated compared: in pa rticular, Soft Magnetic Composite material might be good alternative for rotor stator cores instead laminated steel. analysis model motor based 2D Finite Element Method (FEM) simulation, while optimization evolutionary computing.

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Powder magnetic circuits find more and application in modern electric machines. These frequently comprise soft core powder permanent magnets as a source of flux excitation. It is connected with lot advantages these kinds materials. The main purpose the work to design brushless DC motor magnet core. was assumed that will be prepared from iron bonded by resin Nd-Fe-B melt-spun ribbon. Investigation technology materials done presented. Measurements properties were considered analysis motor....

In the paper, Wind Driven Optimization WDO algorithm is applied to optimal shape design of a class switched reluctance motors. The goal optimization identify geometries which maximize torque and simultaneously minimize iron losses motor. Because twofold criterion, multi-objective version wind driven M-WDO used. Results are eventually compared with those obtained by means standard genetic GA. For construction optimized model (SR) motor measurements resistance inductances vs. rotor position...

Magnetic properties of Fe based composite materials with different particle sizes under a cryogenic condition have been investigated. Realisation this venture has carried out at the liquid nitrogen temperature. Results energy loss density were obtained from measurements static (dc) hysteresis cycles ranging 0·1 to 1·0 T. In turn, results power dynamic (ac) 50 1000 Hz and maximum flux 0·5, 0·8 The study confirmed influence temperature on magnetic parameters. It shown that total increased...

Magnetization of large Nd-Fe-B sintered permanent magnets is still challenging. This type magnet electrically conductive, so impulse magnetization causes a flow eddy currents which prevent the whole volume magnet. The paper deals with and shows method for determination suitable parameters supply system. necessary magnetic field strength to saturation was determined. optimal magnetizing fixture voltage determined from simulations in PSpice software, finite element analyses Maxwell 15...

The performance of drives with switched reluctance motors (SRMs) depends on magnetic materials used in their construction which influence static parameters such as inductance and electromagnetic torque profiles.The paper deals simulations the finite element method comparison measurements.Two kinds were analysed, modified Emerson Electric motor a laminated steel core prototype, one made iron-based powder composite materials.In first part research, magnetization curves measured for dynamic...

N-methyl derivatives of pyridinium with TCNQ are 1:2 charge transfer salts tetracyanoquinodimethane. Despite the fact that chains should be a priori quarter filled bands, these systems insulators gap approximately 0.6 eV. Disordering by irradiation slows down carriers and changes their density. It creates large variety new experimental situations where current carrying, heat carrying magnetic excitations can examined compared. Conductivity thermopower data concerning 22 nominally pure...

Development of new magnetic materials enables development electric machines. Nowadays a lot universities, research centers and factories work on application powder circuits in electromagnetic transducers. This type has advantages. The paper presents methods tailoring physical properties the influence parameters motors.

Switched reluctance motors (SRMs) are still under development to maximise their already proven usefulness.A magnetic circuit of the SRM can be made soft composites (SMCs).The SMCs composed iron powder with dielectric and have a lot advantages in comparison commonly used electrical steel.The paper deals modelling analysis produced by Emerson Electric Co. for washing machines.Numerical calculations were done using FEMM 4.2 program.Magnetic flux densities lines calculated, as well...

In the paper, Wind Driven Optimization WDO algorithm is applied to optimal shape design of a class switched reluctance motors. The goal optimization identify geometries which maximize torque and simultaneously minimize iron losses motor. Because twofold criterion, multi-objective version wind driven M-WDO used. Results are eventually compared with those obtained by means standard genetic GA.

Abstract The paper presents the physical properties of soft magnetic iron composites and Nd-Fe-B bonded permanent magnets measured at room temperature liquid nitrogen. objective research was a determination influence nitrogen on properties, resistivity mechanical different powder materials. Research carried out for three materials: magnetic, i.e. Somaloy 700, AncorLam hard MQP-B used production magnets. Composite specimens were prepared by compression moulding technology.

The paper deals with methods of tailoring magnetic properties soft and hard composites. Comparison injection moulding compression Nd-Fe-B magnets are presented. Magnetic bonded were tailored by different ways such as: amount resin, addition barium ferrite, Al or Fe powders. Influence technological parameters as pressure, time temperature curing on presented in the paper. composites made Fe, Ni, Co iron also

Purpose The purpose of this paper is to examine scaling algorithms in the description and modelling power loss soft magnetic composites (SMCs). Design/methodology/approach Three are examined determine most appropriate composites. coefficients estimated such a way that all measurement data should be collapsed onto single curve, given scaled coordinates. coefficient estimation based on non-linear optimization using generalized reduced gradient method. obtained formulae then used modelling....