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This paper proposes a self-tuning controller for a multi-level inductive Electric Vehicle (EV) battery charger application. By controlling the energy injection frequency of the Inductive Power Transfer (IPT) system, multiple charging levels (4 in number) are achieved. Maximum performance is leveraged by the proposed IPT system using its capability of self-tuning the switching operations to the natural...
A discontinuous pulse width modulation (DPWM) strategy for variable load power factor (PF) with capacitor voltage unbalance control in a three level neutral point clamped (NPC) traction inverter drive for electric vehicles (EVs) is developed and presented in this paper. It is shown that the addition of an appropriate offset signal with the reference DPWM signals generates compensating neutral current...
This paper presents a novel topology of dual rotor radial flux-BLDC motor with Halbach array magnets as an efficient solution for drives. Energy efficient motors are the need of day for electric vehicles, industrial and consumer products. Especially this concept is arrived to cater for the requirements of electrical vehicle. Due to advent of high permeability, high saturation magnetic materials, high...
In this paper, a strategy has been proposed to find optimal number of electric vehicles (EVs) that can be safely integrated to distribution network without violating the networks constraints. Next in the study, we assess the impact of contingency in charging of electric vehicles (EVs) on the distribution grid. The distribution of EVs for charging from contingent feeder to nearby feeders is investigated...
This paper presents new gating techniques to improve the efficiency of full-bridge DC-DC converter for battery charging in electric vehicles. The converter is assisted by a passive auxiliary circuit to extend the soft-switching range. The uncontrolled auxiliary circuit current increases the conduction losses of the converter when gated with conventional phase-shift modulation (PSM) technique. The...
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...
In the upcoming field of e-mobility, roof-mounted solar cell systems are used to operate the thermoelectric system, compressors for maintaining the cabin temperature and also to extend the cruising range of electric vehicles. Managing and maintaining the voltage output is crucial. Intelligent DC-DC converters can improve the overall efficiency of the solar cells. The inbuilt intelligence in the converter...
Vehicular emissions have major impact on global warming. Many countries have had serious considerations about it and have delved into developing alternative fuel technologies. The most optimistic choice for powering electric vehicles at present and the immediate future is battery electric power. The global automobile manufacturers are investing heavily in research of battery run efficient electric...
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