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In this paper, the circuit model of the parallel connected induction motors driven by single inverter is established. According to the circuit model, the problem of unbalanced electromagnetic torque caused by the wheel diameter difference of the parallel connected motors is analyzed. The weighted vector equation of the parallel connected motors is established. To improve the control performance with...
This paper proposed a novel flux weakening scheme based on model predictive control (MPC) for induction motor applied in electric wheel. This control method is implemented based on the voltage control strategy, where model predictive control (MPC) algorithm other than traditional PI regulators is adopted to adjust the flux current component. Experimental results on an experimental platform are given...
We present in this paper a new asymptotically stable scheme for motion control of Electric Vehicle with induction motor drives. The result is established considering a model that includes the electrical and mechanical dynamics of the induction motors, as well as the full body dynamics of high speed Electric Vehicle. The procedures we will follow consist of four steps. First, we design an inner control...
Presently, the direct current motor is widely used as an actuator in electric power steering system (EPS) for compact cars. When it comes to mid-size saloons, the permanent magnet synchronous motor (PMSM) is more suitable for numerical advantages. To acquire the smooth steering feeling, the motor's torque and speed should match well. However, the rated speed of the motor used in EPS is usually round...
This paper deals with the design of current reference generator for optimal vector control in Cartesian coordinates of interior permanent magnet synchronous motor (IPMSM). The generator is the main part of basic design of wheel mounted drive for tram with IPMSM in the torque loop. The proposed control utilizes the maximum torque per ampere strategy (MTPA) up to the base speed and the maximum torque...
A gear-less drive for a wheel chair based on brushless DC motor is presented. The motor has external rotor equipped with neodymium-based permanent magnets and the inner stator is attached to the wheel axle. The performance of the motor is determined using three-dimensional FEM modeling. They are validated by the experimental measurements carried out on the motor prototype.
A quick, simplified method is proposed to compare the axial-flux and radial-flux twin-rotor PM brushless (TRPMBL) motors, with slot-less stators, for the application of in-wheel motor for the gearless drive of an electric vehicle. This method allows answering which of these two motors with the same magnetic and current loading properties and with the same radius and axial length, when built into the...
This paper deals with a new configuration of gearless wheel mounted drives of trams. It introduces profitable properties of interior permanent magnet synchronous motor (IPMSM) for the drive and designs its new control strategy. The proposed control is based on a field oriented control linked to a rotor flux and optimally utilizes the reluctance component of torque in order to achieve maximum motor...
Dynamic behavior analysis of electric motors are required in order to accurately evaluate the performance, energy consumption and pollution level of hybrid electric vehicles. Due to high torque to inertia ratio, high reliability, high efficiency and power density, five phase interior permanent magnet machines (IPMs) are good candidate for hybrid electric vehicles. In this paper dynamic performance...
This paper presents a torque observer design, which can be used to accurately control and estimate impact torque of the automobile wheelchair. The controllers compensate a force for the plant to track up command speed when the plant's torque is accurately observed. This method of observer design is to combine an adaptive observer and a PI controller to accurately control the apparatus. The adaptive...
In this paper, the mechanical transmission and torsional vibration effect on electrical machine torque and stator current in railway traction systems is investigated. Initially, a reduced scale (1/1275) experimental set-up of the traction part is developed and instrumented based on the extrapolation of real scale parameters. Previous studies on an elementary gearbox-based electromechanical system...
This paper introduces an optimal design of an axial-flux permanent magnet wheel motor for a small electric vehicle. This vehicle is driven directly by two wheel motors installed on its rear wheels, which are compact, low weight, and highly efficient. The optimal current waveform of the same pattern as the back electromagnetic force is used to increase the output torque and efficiency, while the field...
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 presents the analytical study, finite element model, and experimental tests on a three-phase surface-mounted permanent magnet (SPM) synchronous motor designed for the wheel of a hybrid vehicle. The paper focuses on the machine design process so as to achieve the maximum torque-to-current and torque-to-volume ratio. Combining finite element simulations and analytical model, the final solution...
This contribution introduces proposed control of a wheel drive with permanent magnet synchronous machine (PMSM) intended for a new generation of 100-percent low-floor trams. The proposed control is based on a field oriented control linked to a rotor flux. The control strategy consists of two control algorithms which are changed based on the rotor speed. The proposed control fully satisfies demanded...
The gearbox monitoring using motor current signature analysis has been rarely proposed while gearboxes are widely used in the industrial applications and they are subjected to progressive deterioration. In this paper, a simple dynamic model of a single stage gearbox is used to show accurately the effect of the rotating input, output and mesh frequency components in the stator current signature for...
To improve the torque performance of wheel motor, a concentrated winding motor with 12-slot-10-pole, embedded magnets rotor structure is presented in this paper. The influence of motorpsilas parameters such as the PMpsilas magnetization orientation length, the winding turns and inner diameter of stator on output torque is discussed by using finite element method. The design method of increasing motor...
Discrete-switched reluctance machine (DSRM) drives represent a new class of reluctance machine in which stator phases are magnetically independent of each other. This machine type is very suitable for in-wheel propulsion applications such as those in the automotive area. Due to the absence of mutual coupling between windings there are many possible control strategies that may be employed for control,...
This paper proposes and implements a new outer-rotor permanent-magnet (PM) hybrid in-wheel motor drive for electric vehicles. Since the proposed PM hybrid motor drive artfully integrates two excitations (PMs and DC field windings) to produce magnetic field, it achieves the ability of a wide rang of flux control, which can offer a very high starting torque for electric vehicles cranking and extend...
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