E. Beser

E. Beser
Kocaeli University · Department of Electrical Engineering

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20
Publications
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219
Citations
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Publications

Publications (20)
Article
Full-text available
In permanent magnet synchronous motor (PMSM) models, only the stator part is given as an electrical circuit and mechanical equations are used for modelling the mechanical part of the machine. In this study, electrical equivalents of mechanical equations are also obtained and mechanical parameters of a PMSM are expressed as an electrical circuit ele...
Article
In this paper, two rotor configurations including different amount of magnet and reluctance parts are presented. The rotors are constituted by means of a flexible hybrid motor structure. Considerable features of the hybrid structure are that the combination of the magnet and reluctance parts can be suitably modified and the mechanical angle (β) bet...
Article
Full-text available
In this paper, an axially laminated reluctance motor is presented. First, a set of a finite element analysis (FEA) on three different axially laminated rotor geometries was carried out and torque profiles of the rotors were predicted. The effect of the stator slot skewing on the torque profiles were also examined in the analysis. After deciding the...
Article
This paper presents a hybrid motor prototype convenient to modify the magnet and reluctance torques. The rotor of the prototype consists of magnet and reluctance parts, so the generated torque includes both magnet and reluctance torques. A considerable feature of the motor is that the ratio of the magnet and reluctance parts can be modified on the...
Article
In this study, design and application of a hybrid motor is introduced. The rotor of the hybrid motor includes separate magnet and reluctance parts. Each part also consists of six pieces. A considerable feature of the motor is that the combination of the parts can be suitably changed due to the magnet and reluctance pieces. The mechanical angle betw...
Article
This paper presents a grid-connected photovoltaic (PV) power conversion system based on a single-phase multilevel inverter. The proposed system fundamentally consists of PV arrays and a single-phase multilevel inverter structure. First, configuration and structural parts of the PV assisted inverter system are introduced in detail. To produce refere...
Article
This paper presents a four-pole hybrid motor structure suitable for modifying the hybridization ratio. First, some theoretical information is given about the generated torque by the proposed motor. Hybrid motor structure is introduced and reluctance and permanent magnet (pm) parts of the rotor are described in detail. The ratio of the reluctance an...
Article
Full-text available
This paper presents a single phase multilevel inverter for using as a voltage harmonic source. First, a single phase multilevel inverter system is presented and the structural parts of the inverter are described. In order to obtain multilevel output voltage waveforms, a switching strategy based on calculating switching angles is explained and an im...
Article
In this study, design and the prototype of a 3kW sun tracking photovoltaic energy conversion system is introduced. The operational principle of the system is explained and the structural parts of the system are described. The most significant feature of the system is the ability of tracking the sun. Thus, the sunlight always comes through the surfa...
Article
This paper presents a single phase multilevel inverter for using as a voltage harmonic source. First, a single phase multilevel inverter system is presented and the structural parts of the inverter are described. The proposed topology does not only produce output voltages with low THD values. It also produces the required harmonic components on the...
Article
In this paper, a novel approach for harmonic optimization of a single-phase multilevel inverter is introduced. Firstly, a novel single-phase multilevel inverter structure is proposed and structural parts of the inverter are described. A simple switching strategy that uses a formula to calculate switching angles for obtaining multilevel voltage form...
Article
In this paper, a novel topology for single-phase multilevel inverter is introduced. Structural parts of the inverter are described in detail. Switching strategy and operational principles of the proposed inverter are explained and operational topologies are respectively given for 7-level inverter structure for simplicity. A method and a formula are...
Conference Paper
In this paper, a novel topology for single-phase 7-Level inverter is introduced. Structural parts of the inverter are described in detail. Switching strategyand operational principles of the proposed inverter are explained and operational topologies are respectively given. A method and a formula are improved for calculating switching angles. The va...
Article
In this paper, a novel topology for single-phase five-level inverter is introduced for reducing harmonic components of output voltage and load current. Operational principles of the proposed inverter are explained and operational topologies are respectively given. A method and a formula are improved for calculating switching angles. The validity of...
Article
In this study, a new topology for single-phase five-level inverter is introduced. Operational principles of the proposed inverter are explained and operational topologies are respectively given. A method and a formula are improved for calculating switching angles. The validity of the proposed inverter is verified through simulations. For alleviatin...
Conference Paper
This paper introduces a novel approach on the design of a permanent magnet assisted synchronous reluctance motor. The rotor of the designed motor is a simple combination of salient poles and NdFeB permanent magnets which are located on the cross axes of the salient poles. In the paper the main features of the design are explained. This paper also f...
Article
Full-text available
In this paper, a novel topology for single-phase five-level inverter is introduced for reducing harmonic components of output voltage and load current. Operational principles of the proposed inverter are explained and operational topologies are respectively given. A method and a formula are improved for calculating switching angles. The validity of...
Article
Full-text available
In this paper a novel topology for single-phase five-level inverter is presented. Operational principles with switching functions are analysed and switching states are given for each situation. To keep the load current being sinusoidal and to have higher dynamic performances, a harmonic filter is designed. Proposed inverter is verified through simu...

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