Ogbuka, C. U.; Agu, M. U.(The Pacific Journal of Science and Technology, 2010)
In this paper, an insightful analysis of controlled AC to DC converters operating under continuous load current mode is presented. The midpoint converter, as the basic building block of other AC to DC converter application ...
Ogbuka, C. U.; Agu, M. U.(The Pacific Journal of Science and Technology, 2009)
A modified approach, involving the addition of a low frequency boost voltage, is developed and adopted as an enhancement to the conventional closed loop fv speed control of a three-phase squirrel cage induction motor modeled ...
Ogbuka, C. U.; Agu, M. U.(The Pacific Journal of Science and Technology, 2009)
To reduce or eliminate harmonic distortions of inverter output signals, pulsewidth modulation strategies are employed. The pulsewidth modulation is presently one of the most popular methods of voltage and frequency control ...
Nnadi, D. B. N.; Onu, N. C.; Oti, S. E.; Ogbuefi, C. U.(Nigerian Journal of Technology (NIJOTECH), 2017)
This research paper expounds microcontroller based binaural digital hearing aids for hearing-impaired people by making use of ATmega328 microcontroller and other circuitries to process the audio signal input by either ...
The human race has carved a niche in the use of various energy sources to do work, such that it simplifies all types of operation, be it in power generation, transportation, industrial processes or domestic use. This has ...
Mbunwe, Muncho Josephine; Ogbuefi, U. C.; Nwankwo, C.(Proceedings of the World Congress on Engineering and Computer Science, 2017)
One of the primary needs for socio economic development in any nation in the world is the provision of reliable electricity supply systems. This paper develops an indigenous technology hybrid solar /Wind/ Diesel Power ...
A new four quadrant Field Orientation-Controlled (FOC) three-phase induction motor drive based on Hysteresis Current Comparison (HCC) has been developed. The direct relationship between current and torque in the Direct-Quadrature ...
Anih, L. U.; Ogbuka, C. U.; Ewelum, M.(The Pacific Journal of Science and Technology, 2014)
This article presents the steady-state performance analysis of a new hybrid polyphase synchronous machine capable of ultra-high power output. The machine comprises a round rotor and a salient-pole rotor which are mechanically ...
Wong, Kainam Thomas; Nonyelu, Chibuzo Joseph; Wu, Yue Ivan(IEEE Transaction on Signal Processing, 2018)
This paper proposes a new configuration of acoustic sensors—the collocation of three cardioid sensors in perpendicular orientation, in order to increase the mainlobe-to-sidelobe height ratio (possibly to ∞). This paper ...
This paper presents the unique synthesis of a motor with a hysteresis torque–speed characteristic. The machine is synthesized from a conventional polyphase squirrel cage induction motor (SCIM) with a high rotor resistance ...
Odeh, Charles I.(Turkish Journal of Electrical Engineering & Computer Sciences, 2016)
This paper presents a single-phase, cascaded half-full-bridge PWM multilevel inverter topology. It is made up of a main inverting H-bridge legs and level-clamping half-bridge circuits, each having its own dc source. The ...
Karimi, Masoumeh; Oskuee, Mohammad Reza Jannati; Ravadanegh, Sajad Najafi(Ministry of Science, Research and Technology, 2017)
In this paper an efficient switching scheme is presented to minimize the multilevel inverters' line output voltage's Total Harmonic Distortion (THD). THD Minimization (THDM) is a proper switching scheme which is used in ...
Mbunwe, Muncho Josephine; Gbasouzor, Austin Ikechukwu(Proceedings of the World Congress on Engineering and Computer Science, 2016)
The effects of abnormal voltages on power system equipment and appliances in the home have raise concern as most of the equipments are very expensive. Each piece of electrical equipment in an electrical system needs to be ...
Oti, Stephen Ejiofor; Nwosu, Cajethan Abuchi; Odeh, Charles I.; Nnadi, Damian Benneth(Elixir International Journal, 2018)
Regulation and controllability have been an important aspect of the industrial motor drives. The three-phase induction machine has been the motor of choice in industrial settings for about the past decade due to its easy ...
Oti, Stephen Ejiofor; Akpama, E. J.; Nnadi, Damian Benneth(International Journal of Engineering and Management Research, 2016)
The purpose of this work is to investigate an induction motor model using its physical parameters so as to examine the characteristic performances: phase currents curves, motor speed curve, electromagnetic torque curve and ...
The provision of energy is a stimulus to increased economy and social activities of any country. The Nigerian energy industry is probably one of the most inefficient in meeting the needs of its people. The gloomy energy ...
Mbunwe, Muncho Josephine(Proceedings of the World Congress on Engineering and Computer Science, 2016)
In recent years, micro grid system has received more and more attention internationally. As the most effective form of distributed generations, micro grid system has found wide applications in many areas. Micro grids are ...
Mbunwe, Muncho Josephine; Nwobu, Mark Ndubuka; Madueme, Victory Chukwuemeka(Proceedings of the World Congress on Engineering and Computer Science, 2015)
This paper discusses a comprehensive review on enhancement of power system stability in multi machine power system network. Modern restructured power systems sometimes operate with heavily loaded lines resulting in power ...
Mbunwe, Muncho Josephine; Nathan, David(Proceedings of the World Congress on Engineering and Computer Science, 2016)
Nigeria continues to wallow in the doldrums of inadequate generation, supply and distribution of power. Industrialization, a major output of stable and adequate power supply has waned, leading to adverse effects on the ...
Mbunwe, Muncho Josephine(Advances in Science, Technology and Engineering Systems Journal, 2017)
Remote control switching device for household application is a home device used to control the switching of household appliances from a distance. It serves to make the switching of household appliances easy for the elderly, ...