Selim Molla

Selim Molla
Shahid Abdur Rab Serniabat Textile Engineering College · Department of Electrical Engineering

M.Sc. in EEE

About

13
Publications
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65
Citations

Publications

Publications (13)
Conference Paper
Full-text available
Superconductor winding based direct drive linear generator (DDLG) provides large output power than that of the DDLG with copper winding. Most of the superconducting DDLG are designed with yttrium barium copper oxide (YBCO) tape or wire. But, the critical temperature of BSCCO Bi-2223 is higher than YBCO. Therefore, Bi-2223 is proposed in this paper...
Article
The linear generators having armature winding of copper or superconductor for generation of electrical power from the oceanic wave are usually made of ordinary mild steel core. For this reason, much core loss occurs that results in generation of heat energy which poses challenges the superconductor to maintain cryogenic temperature. In this paper,...
Article
Full-text available
In this paper, a method of winding optimization of the linear generator is proposed to increase the electrical power generation from the oceanic wave. A linear generator is designed in the ANSYS/Maxwell environment to analyze the proposed winding optimization method. The electrical and magnetic properties of the generator are extensively analyzed....
Article
Full-text available
Most of the conventional linear generator is constructed with either Alnico (specially AlNiCo-9) or Neodymium iron boron (NdFeB) permanent magnets (PMs) for harvesting oceanic wave energy. Alnico is a composition of aluminium (Al), nickel (Ni), and cobalt (Co) added to iron, which is its major volumetric component. Alnico has a poor magnetic energy...
Article
In this paper, the low reluctance superconducting direct drive linear generator (DDLG) for harvesting oceanic wave is presented. At first, a permanent magnet DDLG is designed in the ANSYS/Maxwell environment. The DDLG with both the copper and superconducting winding are characterized with finite element analysis. The DDLG is analyzed with the conve...
Conference Paper
The fossil fuel based generation of electricity is very harmful for the environment due to emission of greenhouse gas. In order to avoid the problem, the tendency of renewable energy utilization is urgently required to increase. At present, there are different types of renewable energy such as solar, wind, biomass, geothermal etc. popularly applied...
Conference Paper
Permanent magnet linear generator (PMLG) is mostly applied to oceanic wave energy conversion systems because of its excellent conveniences. But the conventional PMLGs suffer from much core loss and demagnetization because of armature reaction during operation, which are responsible for the electrical power generation. To overcome this problem, stan...
Conference Paper
Characterization of a permanent magnet linear generator (PMLG) for harvesting oceanic wave energy is presented in this paper. For the characterization, a PMLG has been designed which has a translator containing permanent magnet and vertically symmetric stator. Different high graded magnetic materials are applied to the PMLG to generate high amount...
Conference Paper
Full-text available
The existing linear generator are mostly made of conventional iron core and permanent magnet (PM). During the operation of this generator, it becomes heated because of the magnetic and mechanical losses. When the temperature rises in the linear generator, then the output power becomes low because of degradation of the remanence magnetism of the PMs...
Conference Paper
Full-text available
Almost all the conventional linear generators uses neodymium iron boron (NdFeB) permanent magnets (PMs) to generate magnetic field where neodymium is one of the rare earth elements (REEs). In this paper, a new alternative rare earth free (REF) PM is proposed to be used in the construction of a linear generator for wave energy extraction. The REF PM...
Conference Paper
Full-text available
The traditional linear generators for generation of electricity from the oceanic wave energy are made of ordinary graded steel core which has much core loss. In this paper, minimization the core loss is proposed by using high grade magnetic cores in a direct drive linear generator. The simulation is obtained by considering DI-MAX HF-10X core and co...
Conference Paper
Full-text available
The direct drive linear generators (DDLG) are proven very effective for generation of electricity from the oceanic wave. The existing DDLG is made of conventional steel cores and neodymium iron boron (NdFeB) permanent magnets which result in poor electrical power generation. In this paper, recently invented high graded magnetic cores and permanent...
Conference Paper
Full-text available
The existing linear generators (LGs) are mostly made of ordinary steel cores that is used for conversion of oceanic wave energy into electrical energy. It is analyzed that, excessive magnetic core loss occurs because of using these conventional cores in the LG which cannot generate more output power due to low saturation point. In this paper, a dir...

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