EPE Journal Volume 11-4 
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EPE Journal Volume 11-4 - Editorial
EPE Journal Volume 11-4 - Papers



 EPE Journal Volume 11-4 - Editorial 

An Invitation to EPE-PEMC 2002  [Details]
By D. Ban; I. Nagy; W. Fédak

The Editorial of the EPE Journal Volume 11 N°4, "An invitation to EPE-PEMC 2002", written by Prof. Drago Ban, Prof. Istvan Nagy and Prof. Viliam Fédak, Conference Chairmen of EPE-PEMC 2002.


 EPE Journal Volume 11-4 - Papers 

Non-linear Control with Adaptive Observer for the Sensorless Induction Speed Drives  [Details]
By M. Pietrzak-David; B. de Fornel

In the framework of the sensorless non-linear control of a PWM fed induction motor drive, an original strategy is proposed. The latter is an association of the control based on the Inputs-Outputs (I/O) system linearization [2], with a MRAS (Model Reference Adaptive System) state observer [7]. The observer design and synthesis uses Popov's hyper-stability theory. For the sensorless drive, the rotation speed adaptive law is proposed [5]. All the control and observation parameters are determined analytically. The precise simulations of the global system allow to testing the basic operation functions of this drive and especially the good behaviour at very low rotation speed. Significant experimental results are discussed to illustrate the dynamic performances of this induction motor drive in the four quadrants of the torque-speed plane.

A Novel 3-Phase Hybrid Harmonic and Reactive Power Compensator  [Details]
By P. Singh; J. M. Pacas; C. M. Bhatia

The application of shunt active filters for the harmonic and reactive power compensation in the high power range is mainly restricted because of their low efficiency and the high cost of inverters with high switching frequency. Moreover, the compensation effect is completely lost in case of internal fault in active filter. Hybrid active filters as the combination of a low power PWM inverter and passive filters have been researched and developed to overcme the limitations of shunt active filter. However, they do not have control over fundamental reactive power. This paper proposes a new hybrid active compensator for harmonic and fundamental reactive current compensation, which consists of two small-rated active filters and one bank of passive filters. Simulation and experimental results are presented to show the advantages of the proposed compensator topology.

Power Electronic Interface Devoted to Starter/Alternator Systems for Automotive Applications  [Details]
By M. Incurvati; L. Solero

This paper deals with the analysis and selection of a suitable configuration for the power electronic interface devoted to a starter/alternator (S/A) system for automotive applications. On the basis of the application requirements (i.e. the electrical demands in both monitoring and generating mode of operation of the S/A) different configurations of the power electronic system are compared by means of both power sizing and cost estimations. Axial-flux permanent-magnet (AFPM) machine is selected for the proposed S/A system on the basis of destinguishing characteristics of this machine topology as high specific torque and suitable shape to work as a flywheel. The results of the study indicate that a suitable regulation of the d.c.-link voltage is necessary to dramatically reduce the power size of the electronic components installed on board a vehicle.

Advantage of Electric Motor for Anti Skid Control of Electric Vehicle  [Details]
By S-i. Sakai; Y. Hori

Electric vehicles (EVs) are driven by motor, which is an excellent actuator for motion control compared to combustion engines or hydraulic braking systems. One essential advantage of motor is its fast and precise torque response. Thus, for EV's, fast feedback control can be applied in EVs. In this paper such fast feedback control with motor is applied for anti skid control. Some experimental results show the anti skid effect of motor feedback controller, which attempts to increase the equivalent wheel inertia. Then the influence of actuator's response delay is evaluated, resulting that such feedback control is difficult with slow actuator like hydraulic breaking system. These discussions indicate the advantages of motor, however, the actual braking system in most EVs and hybrid EVs (HEVs) are not pure electric ones at this moment. Therefore, regenerative braking control cooperating with hydraulic braking is also proposed and discussed. It reduces the braking distance by 20% in the simulations.