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Motor control system may be the most important part of electric vehicles. To implement the control strategies, a lot of practical problems need to be taken into account. In this paper, an induction motor control system for electric bus is developed based on digital signal processor (DSP). The control strategy is based on field-oriented control and space vector pulse width modulation. Over-modulation,...
This paper proposed a new approach to detect and isolate the faults of FET in induction motor inverter based on EKF(Extended Kalman Filter). The main idea of this paper is that by estimating the variations of on resistance, we can detect fault of FET of motor inverter. In this paper, the induction motor inverter is considered. A model of induction machine driver which include the on resistance of...
Sensorless controls need accurate fundamental components of the inverter voltage and the detected motor current. However, In a certain type of inverter systems the switching frequency is limited. In that case, the harmonic component degrades the current regulator and speed estimator. Also, when the number of pulses is limited, the fundamental component of inventer voltage should be confirmed its preciseness...
With the demands of the propulsion systems, medium voltage high power AC drives are required. In high power AC drives, the switch frequency of the devices has to be limited in order to reduce the loss of the power semiconductor devices, torque ripple and electromagnetic interference. In this paper, a proposed drive control system with selective harmonic elimination PWM (SHEPWM) for induction motor...
This paper presents a controlled reactive power compensator (RPC) for a stand-alone synchronous generator (SG)-based wind energy conversion system (WECS). The proposed controlled RPC consists of a synchronous condenser (SC), an AC/DC converter whose output supplies the excitation circuit of the SC, and a control scheme that adapts the converter output to supply the field voltage required to fit the...
The paper presents a novel device for energy conservation, power quality enhancement using switched power filter and compensator device for three phase motorized electric loads. The modulated power filter and compensator (MPFC) was developed by the first author to vary the shunt power filter equivalent admittance, modify the reactive power flow to the motorized electric load, improve electrical utilization...
This work presents a simulation analysis of several DC-DC converters applied to a three-level three-phase NPC inverter, while driving an induction motor with a load torque proportional to the square of the speed. The purpose is to identify practical solutions which can suit rural applications fed by renewable sources. Two topologies are proposed. The analysis is carried out through PSCAD/EMTDCtrade...
The aim of this paper is to spread the sliding-mode control design technique on the new class of the ac drives: an induction motor fed by a three-level voltage-source inverter (3LVSI). A comprehensive investigation of possible drive ldquovariable structuresrdquo was carried out. Based on this analysis, an original two-step design procedure allows the use of the ldquoclassicalrdquo result of sliding-mode...
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