Mojtaba Mirsalim

Amirkabir University of Technology | TUS · Department of Electrical Engineering

Here, the authors propose two new Permanent Magnet (PM) embedded linear switched reluctance motors; one is a modular linear hybrid reluctance motor (MLHRM), and the other one is a segmental linear hybrid reluctance motor (SLHRM). Both structures employ PMs between the side teeth of the modules/segments. The main contribution of the PMs is to increa...

This paper proposes two biased flux permanent magnet (BFPM) motors in which the torque ripple issue of conventional doubly salient permanent magnet (DSPM) motor, as its predecessor, is greatly suppressed and the torque density of the BFPM structures has been improved. The permanent magnets (PMs) are positioned where they are easily accessible for a...

Within the past decade, since impediments in nonrenewable fuel sources and the contamination they cause, utilizing green energies, such as those that are sun-oriented, in tandem with electric vehicles, is a developing slant. Coordinating electric vehicle (EV) charging stations with sun-powered boards (PV) reduces the burden of EV charging on the co...

Within the past decade, since impediments in nonrenewable fuel sources and the contamination they cause, utilizing green energies, such as those that are sun-oriented, in tandem with electric vehicles, is a developing slant. Coordinating electric vehicle (EV) charging stations with sun-powered boards (PV) reduces the burden of EV charging on the co...

Within the past decade, since impediments in nonrenewable fuel sources and the contamination they cause, utilizing green energies, such as those that are sun-oriented, in tandem with electric vehicles, is a developing slant. Coordinating electric vehicle (EV) charging stations with sun-powered boards (PV) reduces the burden of EV charging on the co...

Purpose Rotor shape optimization is crucial in designing synchronous reluctance machines (SynRMs) because the machine performance is directly proportional to the rotor’s magnetic saliency ratio. The rotor geometry in synchronous reluctance machines is complex, and many geometrical parameters must be optimized. When fluid flux-barrier geometry is de...

This article introduces an innovative modular and split-tooth linear hybrid reluctance motor (MLHRM) with embedded permanent magnets (PMs) to achieve improved performance of linear switched reluctance motors (LSRMs). First, three new motor structures are introduced, including two, three, and four teeth per pole MLHRMs (MLHRM2, MLHRM3, and MLHRM4)....

There were two main drawbacks in the hybrid excited machines: 1) In the first category, because of the reduction in the PM volume and adding the excitation coil to the remaining space, the torque density of the machine decreased. So, the motor with hybrid excitation suffered from extremely low torque for a specified volume/weight. 2) The excitation...

Using an Arduino UNO board collaborated with a computer is enough for this measurement. So, RTD sensors can be used at different motor positions to read and monitor the temperature data. For instance, we used these sensors in the housing, slot, and surrounding ambient.

Simulation of the motor design under the optimization of metaheuristics is a significant finding of this project. The target is to reach the highest torque density and efficiency simultaneously with the lowest torque ripple and cost. So, multi-objective optimization methods of NSGA-II, MOPSO, and other algorithms have been used.

This article proposes a new double-rotor permanent magnet switched reluctance motor (DR-PMSRM). In the proposed topology, the rotors do not include any coils or PMs; therefore, DR-PMSRM inherits the advantages of conventional SRMs. Splitting teeth for each stator pole has resulted in a remarkable increase in the motor’s torque density. In addition,...

Purpose During the design process of synchronous reluctance motors (SynRMs), one crucial step, after its main dimensioning, is optimizing the rotor geometry for maximum average torque and minimum torque ripple. However, because of the complexity of rotor flux-barrier layers geometry, the number of rotor geometrical parameters is high and this step...

Purpose This paper aims to present an adaptive method based on finite element analysis to calculate iron losses in switched reluctance motors (SRMs). Calculation of iron losses by analytical formulas has limited accuracy. On the other hand, its estimation in rotating electrical machines through fully dynamic simulations with a fine time-step is tim...

In this paper, three new toothed biased flux permanent magnet (PM) motors are introduced and studied, each of which has a specific arrangement of excitation (DC field/PM) and flux path (series/parallel). This results in three main structures, namely HETSPM (hybrid excited toothed biased flux PM), TBFPM (toothed biased flux PM with series flux path)...

Hybrid Hysteresis Motor: Reza Nasiri, Mojtaba Aghamirsalim

In this paper, we propose a generalized over-current (OC) and overload (OL) protection scheme for droop-controlled and directly voltage controlled (DVC) inverter-interfaced distributed energy resources (IIDERs) to be used for protection studies of alternating current (AC) islanded (autonomous) microgrids, and provide a management strategy during an...

Based on concerns including air pollution, electric vehicles are projected to serve as alternatives to fossil fuel vehicles, and acceptance of electric vehicles has been growing. A conventional wireless charger is considered—following a discussion of its merits and demerits, a new structure is introduced, and its circuit characteristics are develop...

Rectifiers used in cathodic protection (CP) applications convert AC voltage to variable DC output. This paper proposes a switching converter for CP, mostly to enhance the efficiency in low to medium output powers, where the duty-cycle is less than 30%. This device is composed of two parts, an AC/DC converter and a DC/DC full-bridge converter. The A...

In this paper, a permanent magnet synchronous motor (PMSM) structure is optimized by a single-objective optimization method known as the cultural algorithm (CA). The torque capability of the PMSM is high due to the presence of the permanent magnets (PMs) in its structure. However, in critical applications with limited space (especially with volume...

This paper introduces a new single slot yokeless permanent magnet (PM) motor with rotor complementary structure. This structure is also a kind of enhanced doubly salient PM motor which has improved output torque and also reduced unbalanced magnetic force. There are two salient rotors, shifted 180 electrical degrees. This design also helps to reduce...

In this paper, a new multi-tooth switched reluctance motor (MT-SRM) is proposed and then based on the original topology, three novel multi-tooth hybrid reluctance motors (MT-HRMs) are introduced to improve the torque characteristics of the SRM. The proposed structures are an MT-HRM with permanent magnets (PMs) between the side teeth of the adjacent...

This article introduces an 8/6, three-phase, modular and crooked-tooth translator linear switched reluctance motor (MCTLSRM) with active and lateral translator structure. First, the topology, its distinctive innovations, and the crooked-tooth angle investigation of the proposed motor are represented. Then, 2-D and 3-D finite element analysis (FEA)...

In this paper, a new integrated tripolar pad using double-sided LCC compensation is proposed and then based on the circuit characteristic, which is analyzed in detail, the introduced system is simulated and investigated. The tripolar pad utilizes three decoupled coils and shows a promising tolerance against rotational displacements and consequently...

A comprehensive study on divided-teeth permanent-magnet assisted outer-rotor switched reluctance motors (SRMs) is carried out. Foremost, it looks into the impact of the number of teeth per stator pole. The average and maximum torque profiles of the compared structures are obtained using finite-element simulations. It is shown that as the number of...

Since years ago, electric machines have played a significant role in providing the energy needs of humans. Over time, different structures have been proposed to increase efficiency and durability and improve the performance of electric machines. One of these structures is the innovative use of magnets as a machine’s excitation, which increases the...

A rotor supports embedded cylindroid permanent magnets, extending parallel to the rotor axis, and transversely magnetized with a respective magnetization direction radial to the rotor axis. the rotor is concentric to an inner stator and an outer stator. The embedded cylindroid permanent magnets include an accurate surface facing the outer stator te...

The performance analysis of a hybrid hysteresis motor using an analytical model is presented in this study. The proposed hybrid motor benefits fromthe advantages of both the conventional axial and radial flux hysteresis motors with a unique stator. For the design of the proposed machine, a pre‐studied hybrid hysteresis motor is investigated. To mod...

Linear switched reluctance motors (LSRMs) are a viable candidate for traction system applications, in that they enjoy the light-weight translator and low manufacturing cost. This thesis deals with introducing a novel high-thrust density modular primary linear switched reluctance motor (MPLSRM). The proposed structure improves the LSRMs characterist...

This paper presents a modified quasi Z-source inverter with a less number of switching devices. In a wide range of modulation index, the output voltage of the proposed inverter has a lower THD compared to Quasi-Z source cascade multilevel inverter (qZS-CMI). To illustrate the superior advantages of the proposed topology over the conventional qZS-CM...

In this study, the radial displacement of the stators is proposed to improve sensor-less speed control for dual-stator brush-less DC motor drives. The mechanical offset between stators leads to the double number of edges in the zero-crossing signal (ZCS) and thus, a more accurate speed estimation. Moreover, updating the speed in the control process...

Corrosion has a huge economic and environmental impact on virtually all facets of the world’s infrastructures, from highways, bridges, and buildings, to oil and gas, chemical processing, and water as well as waste-water systems. Cathodic protection (CP) is the electrical solution to the corrosion problem. The protection from corrosion of buried pip...

This paper proposes an analytical model based on magnetic equivalent circuit (MEC) for a transverse-flux permanent magnet machine (TFPMM). Taking into account the magnetic saturation in iron parts of the machine, the proposed method is capable of calculating the performance parameters of the machine such as flux density, flux linkage, cogging torqu...

As an outstanding candidate for electric vehicle (EV) applications, switched reluctance motors (SRMs) and hybrid-excited switched reluctance motors (HESRMs) perform satisfactorily in terms of robustness, simplicity, and low-cost construction. But, these motors lack high torque and power densities, which restrict their widespread application in EVs....

Permanent magnets (PMs) have been widely used in different types of electrical machines to improve their performance. This paper introduces a novel multi-tooth hybrid-excited switched reluctance motor (MT-HESRM) with PMs placed between the end teeth of the adjacent modules. Thanks to the innovative method of embedding PMs, a unique design is develo...

This paper delves into simultaneously applying the modular stator and segmented rotor to switched reluctance motors. In this regard, a new double-stator segmented-rotor modular switched reluctance motor (DSSR-MSRM) with a new pole combination is proposed. First, the motor topology is introduced and the magnetic circuit model of the motor is analyze...

This paper proposes a novel exterior-rotor multiple teeth enhanced-torque switched reluctance motor (SRM), which exploits permanent magnets (PMs) inside the end teeth of the neighboring stator poles. First, the topology of the proposed motor, namely PM-SRM, is introduced and its working principle is illustrated. Then, based on the magnetic equivale...

This paper proposes an enhanced-torque switched reluctance motor with two sets of permanent magnets (PM-SRM) embedded inside the stator yoke and the end teeth of the neighboring modules. The PMs contribute to intensify the air-gap flux density and reduce the magnetic saturation in the stator poles. As a result, the output torque can be enhanced to...

Tooth-tip Leakage flux (TLF) has a major effect on the prediction of air-gap flux distribution and electromagnetic torque in the permanent magnet (PM) machines. Therefore, deriving a model for TLF is necessary for machine design and optimization. Accurate modeling of TLF can lead to fast and precise solutions, which ease the analysis of electromagn...

By employing Wireless Power Transfer (WPT), the complexities of wire utilization are eliminated in charging electric devices, especially Electric Vehicles (EVs) and Plug-in Hybrid Electric Vehicles (PHEVs). WPT can be used in both stationary and dynamic modes to charge battery of EVs and PHEVs. There are few magnetic structures that are used as tra...

As an outstanding candidate for electric vehicle (EV) applications, switched reluctance motors (SRMs) and hybrid-excited switched reluctance motors (HESRMs) perform satisfactorily in terms of robustness, simplicity, and low-cost construction. But, these motors lack high torque and power densities, which restrict their widespread application in EVs....

IEEE Best Dissertation Award: Selected as the best PhD Dissertation for "Control of Microgrids to Respond to Large-Signal Disturbances and Nonlinearities and its Real-time Implementation", from IEEE Iran Section, May 01, 2019, Yazd, Iran.

Selected as Hot paper form Essential Science Indicators (ESI) and Thomson Reuters: • H.R. Baghaee, M. Mirsalim, G.B. Gharehpetian, H.A. Talebi, “Nonlinear load sharing and voltage compensation of microgrids based on harmonic power-flow calculations using radial basis function neural networks", IEEE Systems Journal, vol. 12 no. 3, pp. 2749-2759, Sep...

Selected as highly cited paper form SciVal and ISI web of science: • H.R. Baghaee, M. Mirsalim, G.B. Gharehpetian, H. Talebi, “Decentralized sliding mode control of WG/PV/FC microgrids under unbalanced and nonlinear load conditions for on- and off-grid modes", IEEE Systems Journal, vol. 12, no. 4, pp. 3108-3119, December 2018, DOI: 10.1109/JSYST.20...

Selected as highly cited paper form SciVal and ISI web of science: • H.R. Baghaee, M. Mirsalim, G.B. Gharehpetian, H.A. Talebi, “A decentralized robust mixed H2/H∞ voltage control scheme to improve small/large-signal stability and FRT capability of islanded multi-der microgrid considering load disturbances”, IEEE Systems Journal, vol. 12, no. 3, pp...

Selected as Hot paper form Essential Science Indicators (ESI) and Thomson Reuters: H.R. Baghaee, M. Mirsalim, G.B. Gharehpetian, “Performance improvement of Multi-DER microgrid for small and large-signal disturbances and nonlinear loads: novel complementary control loop and fuzzy controller in a hierarchical droop-based control scheme”, IEEE System...

Selected as Highly cited paper form Essential Science Indicators (ESI) and Thomson Reuters: • H.R. Baghaee, M. Mirsalim, G.B. Gharehpetian, H.A. Talebi, “Nonlinear load sharing and voltage compensation of microgrids based on harmonic power-flow calculations using radial basis function neural networks", IEEE Systems Journal, vol. 12 no. 3, pp. 2749-...

The main objective of this paper is the analytical modelling of two short-flux-path two-phase reluctance motors with E-type stators: first, a switched reluctance motor (SRM) and second, a hybrid-excitation reluctance motor (HRM). The former has no permanent magnets in its structure, whilst in the latter, there are magnets inside the common-poles. F...

A variable reluctance machine (VRM) has been proven to be an outstanding candidate for electric vehicle (EV) applications. This paper introduces a new double-stator, 12/14/12-pole three-phase hybrid-excited modular variable reluctance machine (MVRM) for EV applications. In order to demonstrate the superiorities of the proposed structure, the static...

Selected as the best PhD Dissertation for "Control of Microgrids to Respond to Large-Signal Disturbances and Nonlinearities and its Real-time Implementation", from Research Deputy of Amirkabir University of Technology (AUT), December 2018, Tehran. Iran.