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The impact of GaN devices and the improvement in efficiency while using such devices in three-phase traction inverter for Electric Vehicles are presented in this paper. Two versions of inverters have been illustrated: first one with Si-IGBT devices while second one is built with GaN-MOSFETs with similar rating of voltage and current. The loss model is expounded for both the inverters; thereafter total...
This paper deals with the multiobjective optimal design of a voltage supply inverter (VSI) fed in-wheel motor for urban electric vehicles (EVs) using genetic algorithms (GAs). The proposed motor is an axial flux permanent magnet (AFPM) synchronous sine-wave motor. This type of motor can be directly integrated into the wheel without mechanical transmission and differential gears. The design problem...
A control scheme for a high torque-density seven-phase induction motor is presented. This scheme integrates within a coherent solution some of the features that are commonly required to a modern electric vehicle drive, such as the capability to exploit the maximum torque in the whole speed range, a weak dependence on the motor parameters, a good robustness against the variations of the dc-link voltage...
Electric Vehicles make use of permanent magnet synchronous traction motors for their high torque density and efficiency. A comparison between interior permanent magnet (IPM) and surface mounted permanent magnet (SPM) motors is carried out, in terms of performance at given inverter ratings. A simplified analytical approach is proposed and its results are confirmed by actual motor design, validated...
In a small motor system, DC brushless motor, in which unidirectional current flows, can be adopted. Minato motor is one of the unidirectional current type DC brushless motors. However, recently, the DC brushless motor, in which the bidirectional current flows, is being mainly studied. The unidirectional motor system is easy to control the direction of the torque by each armature winding. Considering...
This paper deals with the characteristic analysis of the integrated power system applied for the electric propulsion ships. This includes the electric power system modeling which is accomplished with the electric power network mainly composed of generators, switchboards, variable frequency devices, electric motors, and etc. In addition, performance comparison between the permanent magnet synchronous...
Two main types of motor can be used for vehicular application-BLDC and the Induction Motors. This paper compares the performance of a BLDC motor driver system using PWM with that of an induction motor drive also fed from a PWM Inverter. The induction motor is operated under efficiency optimization mode where as the BLDC motors are having inherent high efficiency property. The simulation and experimental...
In-Wheel System is a high-efficiency system to supply a new concept of platform which raises the efficiency of motor drive system and applies it to an environment-friendly automobile by installing a highly efficient electric motor directly to wheels and removing factors of power train. In addition, this system receives a lot of favorable attention especially from various fields (e.g. electric vehicle,...
This paper deals with the analytical design of an axial flux permanent magnet (AFPM) in-wheel synchronous motor for electric vehicles (EVs). AFPM motor is a pancake-type high torque density motor that fits perfectly the wheel of an automobile vehicle and that can, thus, be easily and compactly integrated into the wheel. Therefore, AFPM motor seems to be a better choice than radial flux permanent magnet...
A solid rotor permanent magnet synchronous motor (PMSM) is developed for the electric propulsion part in electric vehicles (EV). The rotor in this kind of motor is composed of splits solid rotors, interior permanent magnets and starting bars. Thus, itpsilas a very complex electromechanical process for solid rotor PMSM pulling into synchronization and it is difficult to analyze and calculate the starting...
There has recently been considerable interest in using the permanent magnet synchronous motor for vehicle propulsion systems but the major problem is torque ripple which causes increased undesirable acoustic noise. As a function of the rotor position, the torque produced by these machines has a pulsating component in addition to the dc component. The torque waveform and, thus, the frequency content...
This paper presents a comparison of electromechanical system used in a vehicle with three different on-board voltage levels. The electromechanical system is composed of interior permanent brushless synchronous motor - IPM and electronic control unit - ECU. Three voltage levels are analyzed in order to increase systempsilas efficiency and decrease systempsilas weight. Additionally, the important factors...
The variable-speed traction motor used in electric vehicle is investigated in this paper. Firstly the design method of variable-speed traction motor is introduced, and then the electromagnetic parameters and the electromagnetic fields are calculated. Based on the geometrical dimensions and parameters, a simulation model in the vector control system is used to predict the performances of this traction...
This paper presents a drive system for a 2.5 ton electric fork lift using induction motors. In this system, DC motors used in conventional electric fork lifts were replaced with induction motors which are cheap, robustness, and controllable at various speeds. The high performance drive system for the induction motor was developed, and applied to a 2.5 ton electric fork lift and conducted an experiment...
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