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Mulugeta Gebrehiwot Gebremichael

Mulugeta Gebrehiwot Gebremichael

Ph.D

About

10
Publications
16,854
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26
Citations

Publications

Publications (10)
Article
Apart from the various technical issues, voltage and current spikes have always been the challenges of vehicular circuit designers. This paper presents a protection scheme against the possible damaging effects of an overcurrent phenomenon. The proposed circuit is capable of continuously measuring the magnitude of phase current through the motor win...
Article
Full-text available
In this paper, a system comprising a solar photovoltaic (PV)/micro-hydropower/battery bank/converter has been designed, modelled, simulated, and optimized for the rural area of Wimana village, Rwanda. The total load has been fairly estimated for the residential electric utility needs. To satisfy the load demand, solar photovoltaic (4 kW) and micro-...
Conference Paper
Range extended electric vehicles are becoming the better choice for urban driving. They pave the way for a reduced battery pack, efficient fuel economy, better mileage and an ease for a range anxiety. Designers of vehicular electronics face number of technical challenges like overcurrent, overvoltage and over-temperature due to some abnormalities i...
Conference Paper
Full-text available
As demand for mobility continues to rise accompanied by environmental and energy problems, electric vehicles (EVs) have been heralded as imminent long-term solutions to sustainable transport electrification. Battery electric vehicles in particular offer zero tailpipe emissions. However, they can only be considered as true greenhouse gas (GHG) emiss...
Conference Paper
Full-text available
This paper deals with a protection circuit against an overvoltage caused by a sudden battery removal from the dc link terminals. The system can be protected against this overvoltage by opening the neutral point of the generator and by engaging a dissipating resistor across the dc link terminals. This method is successfully tested and validated.
Article
Full-text available
It is convenient to use the generator of a range extender also for starting the engine. The torque needed by the engine at the early stage of engine cranking has been modeled. The sum of the torques developed by the starter/generator and the rotational inertia including the flywheel, have to be sufficiently large in order to overcome the compressio...
Conference Paper
Full-text available
Hybrid Electric Vehicles are gaining popularity both in civil and military applications due to their promising advantages in achieving better fuel economy and reduced pollutant emissions when compared to the conventional internal combustion engine (ICE) vehicles. However, the advantages gained in vehicle electrification do have different significan...
Conference Paper
Full-text available
Electric cars have the disadvantage of a limited range, and drivers may experience a range anxiety. This range anxiety can be solved by adding a range extender. But, the range extender should be light so as not to significantly increase the weight of the original vehicle. In urban areas with dense traffic (usually developing countries), the average...

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