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Proposing a novel electric motor which stator and rotor are made of amorphous alloy instead of traditional silicon material, Based on Ansoft/MAXWELL2D, using finite element method, the Electromagnetic field of the designed motor is analyzed. The main curves are given including flux density distribution vs. angle, output torque vs. speed and the relationship between efficiency and speed. The comparison...
This paper will describe how finite element analysis can be utilize to design and model the performance of rotary electrical machines. Special interest placed on the induction motor since the design is simple, and has greatest influence in operation of electrical power system. Transient AC analysis has been studied as it is necessary to examine the motor's performance dynamically. Opera 2D software...
Pulse width modulation (PWM) inverters are widely applied to control motors. It will often increase the eddy current losses in the motors. In this paper, the authors deal with the effects of eddy current losses with amplitude modulation and switching frequency in an induction motor fed by PWM Inverter. The method is employed by a time-stepping finite element analysis (FEA). The FEA model of motor...
This paper presents the analysis method of a capacitor-run signal-phase induction motor behavior by using circuit-coupled two-dimensional finite element method. In order to analyze the machines accuracy under rotating magnetic fields, the voltage source, run-capacitor and slide boundary are considered. The voltage coupled model included slip boundary and calculation method is presented, and the simulation...
In this paper, a method for predicting the electromagnetic vibration of PM brushless motors is presented. It has accounted for both PM blushless AC and DC motors. It calculates the electromagnetic force on individual stator teeth by the Maxwell stress method, based on 2-D finite element analysis of the electromagnetic field. The resulting radial force contour is then used in an analytical mechanical...
Single-sided linear induction motor (SLIM) has many advantages, such as simple structure, easy maintenance, less environmental pollution and direct drive without the translation of mechanisms etc. However, longitudinal end effect deteriorates the performance because of the discontinuous magnetic circuit in SLIM. In this paper, the 2-D transient electromagnetic field of SLIM is computed using finite...
A method for calculating the performance of double-sided linear induction motor (DLIM) with short secondary is presented in this paper. The analytical solution of air gap flux density is firstly deduced from one-dimensional (1-D) electromagnetic field equations, then in the equivalent circuit of the motor, to take both longitudinal and transverse end effects into account, the correction coefficients...
Starting toque is computed based on two-dimensional (2-D) FEM with a field-circuit coupled analysis. It is discussed that the starting performance of three-phase capacitor motor is better than that of conventional induction motor, in particular, for the operating condition with starting capacitor. The results of calculation are compared to tested values, and it is verified that this new type motor...
A pulse magnetic traveling wave propulsion system of a novel magnetic levitation electromagnetic launcher is proposed in this paper. The article builds a simulation model in the finite element software, and calculates the influence of the excitation currentpsilas pulse rise time, pulse trailing time and pulse duration time on the driving force of linear motor. Finally, the requirements for waveform...
Because of the negative-sequence magnetic field, the single-phase induction motor has higher temperature, lower output torque and lower efficiency comparing with three-phase induction motor. Based on negative-sequence magnetic field compensation principle, this paper presents a new type single-phase motor with a special stator windings configuration to weaken the negative sequence magnetic field and...
This paper presents the calculation of eddy current losses in a solid-rotor cage induction motor by using two-dimensional time-harmonic finite element analysis. The end impedances are represented by field-coupled circuit elements and nonlinear properties are introduced by effective magnetization curve. To evaluate the effects of eddy current losses on motorpsilas performance, the losses in solid rotor...
A new approach employing the circuit analysis theory instead of electromagnetic field theory is presented to calculate the rotor resistances and inductances of single-phase induction motors. The resistance and inductance parameters are obtained at positive sequence and negative sequence frequencies, respectively, with skin effect consideration. The rotor bar is divided into many thin-layers with their...
In this paper, we compare the aluminum die-cast bar with copper die-cast bar and we study the optimal design of copper die-cast rotor bars of three phase induction motors with respect to the values of starting torque, efficiency. The study is base on the Taguchi method and the finite element analysis of the three phase induction motor where the rotor slots. The Taguchi method has been widely used...
This paper presents the design and analysis of a new double-stator permanent brushless (DSPMBL) motor for hybrid electric vehicles. The corresponding output power equation is analytically derived. The initial calculation of motor dimensions and parameters, including the core diameter, stack length, permanent magnet size and winding connection modes, are also discussed. A DSPMBL motor is designed....
Numerous researchers have already been involved in for designing, driving and optimizing RTWUSM, such as the control model of the whole USM system, the no-load speed, the maximum output power, the characteristic about torque to the frequency, etc. USM has been widely manufactured for civil use in Japan, military using in USA and Germany, and other uses in many European and Asia country. But fewer...
The skin effect of rotor current is one of key factors which affect the simulation accuracy of three-phase induction motors with deep rotor bars. This paper proposes an improved dynamic model considering the skin effect of three-phase induction motors at arbitrary operation, from the starting to rated-load operation. The simulation results using the proposed model are compared with those from the...
A line-start permanent magnet synchronous motor (PMSM) with solid rotor is developed and a method to study operating performance of this kind of motor is presented, in this paper. A 30 kW solid rotor PMSM with simply structure was taken as the analysis model, and the numerical calculation model under some assumptions, as well as the solving regions of the derived model, is proposed. By using improved...
The variable-speed asynchronous traction motor used on electric locomotive is investigated in this paper. Based on the geometrical dimensions and the finite element method, the field circuit coupled model of a traction motor is presented; the electromagnetic field and the performance of a traction motor operating on different state are calculated. The result shows the influence of the nonlinear phenomena,...
This paper presents the optimal barrier design in single-phase LSPM (line-start permanent magnet motor) considering the efficiency. The line-start permanent-magnet motor is a synchronous hybrid PM/reluctance motor that is being developed for applications including compressors of air conditioner that require a high-efficiency alternative to the induction motor. To consider nonlinear characteristics,...
The paper mainly researched how the Wye and delta connection affect the copper losses in induction motor under over-voltage condition. The multi-slice time-stepping finite element method (FEM) was utilized to calculate the copper losses of a 5.5-kW skewed motor under no-load and different load conditions respectively. It is shown that, when the motor is supplied with 10% over-voltage, the delta connection...
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