Tarek Ahmed - Academia.edu (original) (raw)

Papers by Tarek Ahmed

Research paper thumbnail of Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Switching PWM Inverter with High Frequency Transformer for Arc Welder

Power Electronics and …, 2004

Page 1. IEEE PEDS 2005 Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Swit... more Page 1. IEEE PEDS 2005 Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Switching PWM Inverter with High Frequency Transformer for Arc Welder Keiki Morimoto Nabil A. Ahmed Hyun - Woo Lee Toshimitsu Doi Mutsuo Nakaoka ...

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Research paper thumbnail of Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Switching PWM Inverter with High Frequency Transformer for Arc Welder

Power Electronics and …, 2004

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Research paper thumbnail of ري الخوخ 1 يونية

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Research paper thumbnail of -

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Research paper thumbnail of Utilization of nanotechnology to enhance percutaneous absorption of acyclovir in the treatment of herpes simplex viral infections

International Journal of Nanomedicine, 2015

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Research paper thumbnail of A Novel Induction Generator System for Small-Scale AC and DC Power Applications

IEEE 36th Conference on Power Electronics Specialists, 2005., 2005

Abstract-This paper presents a novel dynamic model in the stationary reference frame for a diode ... more Abstract-This paper presents a novel dynamic model in the stationary reference frame for a diode bridge rectifier with a DC-link filter directly connected to a three-phase induction generator (IG). Moreover, a hybrid excitation system, consisting of a capacitor bank and an active ...

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Research paper thumbnail of EPIMORPHISMS IN CYLINDRIC ALGEBRAS AND DEFINABILITY IN FINITE VARIABLE LOGIC

The main result gives a sufficient condition for a classK of finite dimensional cylindric algebra... more The main result gives a sufficient condition for a classK of finite dimensional cylindric algebras to have the property that not every epimorphism in K is surjective. In particular, not all epimorphisms are surjective in the classes CAn of n-dimensional cylindric algebras and the class of representable algebras in CAn for finite n > 1, solving Problem 10 of (28)

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Research paper thumbnail of Advanced Active Power Filter Controlled permanent-magnet synchronous generator for Automotive Applications

2007 IEEE Power Electronics Specialists Conference, 2007

... Advanced Active Power Filter Controlled permanent-magnet synchronous generator for Automotive... more ... Advanced Active Power Filter Controlled permanent-magnet synchronous generator for Automotive Applications Katsumi Nishida Tarek Ahmed Mutsuo Nakaoka Ube National College of Technology ... i l (k) i lu i lv DC Load Rdc Lf Cf ... i cu i cv Phase Locked Loop AC Load Sw ...

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Research paper thumbnail of A novel current control system using PLL circuit for interior permanent magnet synchronous generator

2008 IEEE Power Electronics Specialists Conference, 2008

Interior permanent magnet synchronous generator (IPMSG) has several advantages such as high effic... more Interior permanent magnet synchronous generator (IPMSG) has several advantages such as high efficiency and high power-to-weight ratio because of its additionally developed reluctance torque. Therefore, a novel IPMSG system using a well-designed phase locked-loop circuit (PLL) and interface filters is proposed. Owing to introducing the two devices, the PLL and interface filters, the direction of the quadrature axis of the

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Research paper thumbnail of Grid power integration technologies for offshore ocean wave energy

2010 IEEE Energy Conversion Congress and Exposition, 2010

In this paper, the advanced electric technologies for grid power integration of different offshor... more In this paper, the advanced electric technologies for grid power integration of different offshore wave energy conversion devices are presented. The electrical connection configurations for integrating the electric power of the multi wave energy conversion devices such as the Oscillating Water Column, Pelamis, the Wave Point Absorbers and the Wave Dragon are developed by employing the most efficient low cost

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Research paper thumbnail of Utility Grid Interfaced PV Power Conditioner Using Boost Chopper-Four Switch Three Phase Inverter with a Novel Quasi Resonant DC Link Snubber

Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06., 2006

... Inverter with A Novel Quasi Resonant DC Link Snubber Tarek Ahmed, Mutsuo Nakaoka Yamaguchi Un... more ... Inverter with A Novel Quasi Resonant DC Link Snubber Tarek Ahmed, Mutsuo Nakaoka Yamaguchi University 2-16-1 Tokiwadai, Ube Yamaguchi, Japan 755-8611 tarek@pe-news1. eee.yamaguchi-u.ac.jp Shinichiro Nagai Sanken Electric Co., Ltd. ...

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Research paper thumbnail of Development of grid-connected wind energy system employing interior PM Synchronous Generator and multi-pulse rectifier

2010 IEEE Energy Conversion Congress and Exposition, 2010

... Generator and Multi-pulse Rectifier Katsumi Nishida Tarek Ahmed Mutuo Nakaoka ... This scheme... more ... Generator and Multi-pulse Rectifier Katsumi Nishida Tarek Ahmed Mutuo Nakaoka ... This scheme is low cost when compared with the full power converter. When the speed of the generator alters, the voltage value on the dc side of the diode rectifier will change. ...

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Research paper thumbnail of 32 V-300 A/60 kHz edge resonant soft-switching PWM DC/DC converter with DC rail series switch-parallel capacitor snubber assisted by high-frequency transformer parasitic components

The conduction losses of the active switches can be lowered, which are connected to the primary s... more The conduction losses of the active switches can be lowered, which are connected to the primary side of extremely step-down high frequency transformer because of low voltage large current rectifier configuration. This paper presents two new circuit topologies of DC busline side active edge resonant snubber assisted soft-switching PWM full-bridge DC-DC converter acceptable for either utility AC 200 V-rms or

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Research paper thumbnail of The Edge Effect in Solid Particle Erosion of Ceramic Second-Phase Particles

Key Engineering Materials, 1992

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Research paper thumbnail of Quasi-Resonant Dual Mode Soft Switching PWM and PDM High-Frequency Inverter with IH Load Resonant Tank

IEEE 36th Conference on Power Electronics Specialists, 2005., 2005

Page 1. Quasi-Resonant Dual Mode Soft Switching PWM and PDM High-Frequency Inverter with IH Load ... more Page 1. Quasi-Resonant Dual Mode Soft Switching PWM and PDM High-Frequency Inverter with IH Load Resonant Tank Nabil A.Ahmed, Ahmad Eid, Hyun Woo Lee and Mutsuo Nakaoka Kyungnam University The Electric Energy ...

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Research paper thumbnail of Commercial utility frequency AC to high frequency AC soft switching power conversion circuit with non smoothing DC link for IH dual packs heater

The 30th Annual Conference of the lEEE Industrial Electronics Society, November 2 - 6,2004, Busan... more The 30th Annual Conference of the lEEE Industrial Electronics Society, November 2 - 6,2004, Busan, Korea ... Commercial Utility Frequency AC to High Frequency AC Soft Switching Power Conversion Circuit with Non Smoothing DC Llnk for IH Dual Packs Heater

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Research paper thumbnail of Switched Capacitor Snubber-Assisted Zero Current Soft Switching PWM High Frequency Inverter with Two-Lossless Inductive Snubbers

2005 International Conference on Power Electronics and Drives Systems, 2005

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Research paper thumbnail of Omitting types for finite variable fragments and complete representations of algebras

The Journal of Symbolic Logic, 2008

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Research paper thumbnail of Algebraic Logic, Where Does it Stand Today?

Bulletin of Symbolic Logic, 2005

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Research paper thumbnail of On Complete Representations of Reducts of Polyadic Algebras

Studia Logica, 2008

Abstract Following research initiated by Tarski, Craig and Németi, and futher pursued by Sain and... more Abstract Following research initiated by Tarski, Craig and Németi, and futher pursued by Sain and others, we show that for certain subsets G of ω ω, atomic countable G polyadic algebras are completely representable. G polyadic algebras are obtained by restricting ...

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Research paper thumbnail of Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Switching PWM Inverter with High Frequency Transformer for Arc Welder

Power Electronics and …, 2004

Page 1. IEEE PEDS 2005 Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Swit... more Page 1. IEEE PEDS 2005 Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Switching PWM Inverter with High Frequency Transformer for Arc Welder Keiki Morimoto Nabil A. Ahmed Hyun - Woo Lee Toshimitsu Doi Mutsuo Nakaoka ...

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Research paper thumbnail of Advanced High Power DC-DC Converter using Novel Type Half-Bridge Soft Switching PWM Inverter with High Frequency Transformer for Arc Welder

Power Electronics and …, 2004

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Research paper thumbnail of ري الخوخ 1 يونية

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Research paper thumbnail of -

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Research paper thumbnail of Utilization of nanotechnology to enhance percutaneous absorption of acyclovir in the treatment of herpes simplex viral infections

International Journal of Nanomedicine, 2015

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Research paper thumbnail of A Novel Induction Generator System for Small-Scale AC and DC Power Applications

IEEE 36th Conference on Power Electronics Specialists, 2005., 2005

Abstract-This paper presents a novel dynamic model in the stationary reference frame for a diode ... more Abstract-This paper presents a novel dynamic model in the stationary reference frame for a diode bridge rectifier with a DC-link filter directly connected to a three-phase induction generator (IG). Moreover, a hybrid excitation system, consisting of a capacitor bank and an active ...

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Research paper thumbnail of EPIMORPHISMS IN CYLINDRIC ALGEBRAS AND DEFINABILITY IN FINITE VARIABLE LOGIC

The main result gives a sufficient condition for a classK of finite dimensional cylindric algebra... more The main result gives a sufficient condition for a classK of finite dimensional cylindric algebras to have the property that not every epimorphism in K is surjective. In particular, not all epimorphisms are surjective in the classes CAn of n-dimensional cylindric algebras and the class of representable algebras in CAn for finite n > 1, solving Problem 10 of (28)

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Research paper thumbnail of Advanced Active Power Filter Controlled permanent-magnet synchronous generator for Automotive Applications

2007 IEEE Power Electronics Specialists Conference, 2007

... Advanced Active Power Filter Controlled permanent-magnet synchronous generator for Automotive... more ... Advanced Active Power Filter Controlled permanent-magnet synchronous generator for Automotive Applications Katsumi Nishida Tarek Ahmed Mutsuo Nakaoka Ube National College of Technology ... i l (k) i lu i lv DC Load Rdc Lf Cf ... i cu i cv Phase Locked Loop AC Load Sw ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A novel current control system using PLL circuit for interior permanent magnet synchronous generator

2008 IEEE Power Electronics Specialists Conference, 2008

Interior permanent magnet synchronous generator (IPMSG) has several advantages such as high effic... more Interior permanent magnet synchronous generator (IPMSG) has several advantages such as high efficiency and high power-to-weight ratio because of its additionally developed reluctance torque. Therefore, a novel IPMSG system using a well-designed phase locked-loop circuit (PLL) and interface filters is proposed. Owing to introducing the two devices, the PLL and interface filters, the direction of the quadrature axis of the

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Grid power integration technologies for offshore ocean wave energy

2010 IEEE Energy Conversion Congress and Exposition, 2010

In this paper, the advanced electric technologies for grid power integration of different offshor... more In this paper, the advanced electric technologies for grid power integration of different offshore wave energy conversion devices are presented. The electrical connection configurations for integrating the electric power of the multi wave energy conversion devices such as the Oscillating Water Column, Pelamis, the Wave Point Absorbers and the Wave Dragon are developed by employing the most efficient low cost

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Utility Grid Interfaced PV Power Conditioner Using Boost Chopper-Four Switch Three Phase Inverter with a Novel Quasi Resonant DC Link Snubber

Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06., 2006

... Inverter with A Novel Quasi Resonant DC Link Snubber Tarek Ahmed, Mutsuo Nakaoka Yamaguchi Un... more ... Inverter with A Novel Quasi Resonant DC Link Snubber Tarek Ahmed, Mutsuo Nakaoka Yamaguchi University 2-16-1 Tokiwadai, Ube Yamaguchi, Japan 755-8611 tarek@pe-news1. eee.yamaguchi-u.ac.jp Shinichiro Nagai Sanken Electric Co., Ltd. ...

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Research paper thumbnail of Development of grid-connected wind energy system employing interior PM Synchronous Generator and multi-pulse rectifier

2010 IEEE Energy Conversion Congress and Exposition, 2010

... Generator and Multi-pulse Rectifier Katsumi Nishida Tarek Ahmed Mutuo Nakaoka ... This scheme... more ... Generator and Multi-pulse Rectifier Katsumi Nishida Tarek Ahmed Mutuo Nakaoka ... This scheme is low cost when compared with the full power converter. When the speed of the generator alters, the voltage value on the dc side of the diode rectifier will change. ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of 32 V-300 A/60 kHz edge resonant soft-switching PWM DC/DC converter with DC rail series switch-parallel capacitor snubber assisted by high-frequency transformer parasitic components

The conduction losses of the active switches can be lowered, which are connected to the primary s... more The conduction losses of the active switches can be lowered, which are connected to the primary side of extremely step-down high frequency transformer because of low voltage large current rectifier configuration. This paper presents two new circuit topologies of DC busline side active edge resonant snubber assisted soft-switching PWM full-bridge DC-DC converter acceptable for either utility AC 200 V-rms or

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Edge Effect in Solid Particle Erosion of Ceramic Second-Phase Particles

Key Engineering Materials, 1992

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Quasi-Resonant Dual Mode Soft Switching PWM and PDM High-Frequency Inverter with IH Load Resonant Tank

IEEE 36th Conference on Power Electronics Specialists, 2005., 2005

Page 1. Quasi-Resonant Dual Mode Soft Switching PWM and PDM High-Frequency Inverter with IH Load ... more Page 1. Quasi-Resonant Dual Mode Soft Switching PWM and PDM High-Frequency Inverter with IH Load Resonant Tank Nabil A.Ahmed, Ahmad Eid, Hyun Woo Lee and Mutsuo Nakaoka Kyungnam University The Electric Energy ...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Commercial utility frequency AC to high frequency AC soft switching power conversion circuit with non smoothing DC link for IH dual packs heater

The 30th Annual Conference of the lEEE Industrial Electronics Society, November 2 - 6,2004, Busan... more The 30th Annual Conference of the lEEE Industrial Electronics Society, November 2 - 6,2004, Busan, Korea ... Commercial Utility Frequency AC to High Frequency AC Soft Switching Power Conversion Circuit with Non Smoothing DC Llnk for IH Dual Packs Heater

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Switched Capacitor Snubber-Assisted Zero Current Soft Switching PWM High Frequency Inverter with Two-Lossless Inductive Snubbers

2005 International Conference on Power Electronics and Drives Systems, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Omitting types for finite variable fragments and complete representations of algebras

The Journal of Symbolic Logic, 2008

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Algebraic Logic, Where Does it Stand Today?

Bulletin of Symbolic Logic, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of On Complete Representations of Reducts of Polyadic Algebras

Studia Logica, 2008

Abstract Following research initiated by Tarski, Craig and Németi, and futher pursued by Sain and... more Abstract Following research initiated by Tarski, Craig and Németi, and futher pursued by Sain and others, we show that for certain subsets G of ω ω, atomic countable G polyadic algebras are completely representable. G polyadic algebras are obtained by restricting ...

Bookmarks Related papers MentionsView impact