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This article presents the results of the magneto-electric machine's research of the wind energy conversion systems' (WECS) alternating current. Calculation of the researched machine was carried out with the latest version of the programs "Elcut 6.2 Professional" complex using. The operation's purpose was creation of the researched object's adequate geometric model, obtaining the machine's...
Internal combustion engine start processes in Hybrid Electric Vehicles (HEVs) are accompanied by large currents in the windings of electrical machines. It can lead to insulation overheating and fault operation mode. Induction squirrel-cage machine is one of the best AC machines for HEVs. The high efficiency of HEV induction machine with compact stator winding form is proposed. Its stator electrical...
The fine analysis of rotor losses of induction motors requires separation of the slip- and high-frequency electromagnetic quantities under load conditions. However, the conventional method involves a full slip-cycle finite element simulation, which is very expensive in terms of CPU time and memory usage. To obtain a precise iron loss prediction with reduced time consumption, this paper proposes three...
Theoretical researches and simulation results, which based on numerical realization of the finite element method of three-dimensional transient mathematical model of the electrical and magnetic fields in induction motor which displayed the features of the processes of AC energy conversion in the experimental short-circuit mode are obtained. Through the implementation of the dynamic spatial model of...
This paper presents a novel double-fed flux-modulation (DF-FM) machine which offers an effective electric solution for electric vehicle (EV) propulsion. This design can realize adjusted speed and torque transmission without planetary gearbox and brush system in EVs. Main advantages of this design involve high torque density, wide speed range operation and low friction loss. The steady and transient...
This paper describes the causes of cogging torque in Permanent Magnet synchronous Motor. Establishes a motor model by ANSOFT software, uses Finite Element Method to quantitative analysis and comparative peak cogging torque and torque with notches at different locations, and different number of auxiliary slot. The conclusion is that notch reasonable can reduce the cogging torque of permanent magnet...
This paper introduces the solution of a 150 kW high speed permanent magnet motor (HSPMM). The motor is studied with its design considerations concluded for high speed application at first; then the HSPMM air gap flux density is analytically calculated and verified by finite element method (FEM); the motor stator slot number and slot opening width are studied and investigated to obtain a desirable...
Line-start permanent magnet synchronous motor with composite rotor is a new type of permanent magnet synchronous motor, which uses eddy currents induced in solid rotor and copper bars to achieve self- starting capability. In order to research the demagnetization of permanent magnets under three-phase short circuit and out-of-step fault, the finite element model considering saturation, eddy currents...
The critical speed of the rotor can be calculated accurately by the transfer matrix method and the finite element method. Since the mass of the shaft section is neglected by the transfer matrix method, the calculation result is slightly larger. By establishing the 3D finite element model of the rotor system, the critical speed and mode of the rotor are analyzed. The results show that the bearing support...
An electric machine with permanent magnets on both its rotor and stator is proposed and studied. The key idea is to using the bi-directional flux modulation effect to realize a structure with more rotor poles and less stator poles. Compared with the conventional machines with single-sided permanent magnet excitation, the proposed machine has more flexible pole-slot design when the pole number is large...
As a response to the rare earth crisis arising in recent years, two new permanent magnet synchronous reluctance (PMSynR) motors with non-rare-earth materials are proposed for electric vehicle (EV) applications in this paper. The key feature of the motor is to adopt different magnet and flux-barrier combinations to obtain relatively high torque density, high power density and high efficiency. To verify...
This paper proposes a novel 16/10 segmented rotor switched reluctance machine (SSRM) for belt-driven starter generators (BSGs) of hybrid electric vehicles. The stator of proposed SSRM consists of two types of stator poles: exciting pole and auxiliary pole, and the rotor of proposed SSRM is made up of a series of discrete segments. Firstly, the concept of the conventional SRM and proposed machine is...
In this paper the demagnetization faults that occur in a axial flux permanent magnet (AFPM) synchronous machine using 3D finite element method (FEM) are studied. Two different generator topologies, a single rotor and a double rotor coreless topology, are simulated. The harmonic components of the spectrum of the back-emf and the stator current waveforms are calculated and the fault indicator harmonics...
Theoretical researches and simulation results, which based on numerical realization of the finite element method of three-dimensional mathematical model of the induction motor are obtained. The regularities of the distribution of the induction and magnetic field energy in the short-circuit mode and their quantitative relation for active zone and the area of the coil ends of the stator windings of...
In this paper a novel methodology for analysis of electrical machines using finite element method is presented. At the beginning a short presentation of the investigated motor as well as the basic topologies, performance properties and characteristics is presented. Afterwards a brief presentation of the finite element method and its application in design and analysis of electrical machines is introduced...
Fault detections are essential for unexpected failures of the electrical motors. Early detection and faults diagnosis leads to effective operations. This paper deals a diagnosis of faults in three phase induction motor by means of zero-sequence stator current spectrum. The simulation and experimental setup are designed under bearing faults. Using finite element method (ANSOFT MAXWELL-2D) the motor...
Permanent magnet (PM) motor can offer high fault tolerant by introducing fractional slot concentrated winding. However, this winding configuration produces high back-EMF under flux weakening capacity because of low reluctance torque. Then, other protection techniques will likely be required to prevent dangerous overvoltage conditions if the inverter shuts down unexpectedly at high speeds. Additionally,...
In this paper we present some aspects about the design of a small permanent magnet wind generator with axial magnetic flux often used in residential wind turbine. There are presented the main steps of the magnetic and electric calculations with applications to a specific case: 0.6 kVA wind generator, and the finite elements analysis of the excitation magnetic field generated by permanent magnets....
This paper investigates the capability of both permanent magnet synchronous machine (PMSM) and permanent magnet flux switching (PMFS) machine to provide high torque to inertia ratio for applications with demanding response in terms of acceleration and fast dynamic. The PMSM has higher torque density and efficiency among different electrical machines. However, the presence of the permanent magnets...
This paper proposes a design procedure of induction motor for Liquefied Natural Gas (LNG) carrier applications, implementing dual fuel electric propulsion system. For the purposes of the analysis, a preliminary motor design stage is performed by using classical analytical formulae and a parameterization of the design is introduced. In a next step, a critical design stage is developed, based on a geometry...
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