# IEEE Transactions on Energy Conversion

## Issue 99

Early Access articles are new content made available in advance of the final electronic or print versions and result from IEEE's Preprint or Rapid Post processes. Preprint articles are peer-reviewed but not fully edited. Rapid Post articles are peer-reviewed and edited but not paginated. Both these types of Early Access articles are fully citable from the moment they appear in IEEE Xplore.

## Filter Results

Displaying Results 1 - 25 of 81
• ### Disturbance Rejection Analysis and FPGA based Implementation of a Second Order Sliding Mode Controller fed Induction Motor Drive

Publication Year: 2018, Page(s): 1
| |PDF (2885 KB)

This paper presents a unified approach to deal with sliding mode controllers used for induction motor drives. The study digs deep to identify matched and unmatched disturbances and derive conditions to satisfactorily reject the same. The investigation reveals fundamental limitations of hysteresis (first order sliding mode) controllers those can be overcome by higher order controllers. Second order... View full abstract»

• ### On-line Parameter Estimation of a Transient Induction Generator Model based on Hybrid Method

Publication Year: 2018, Page(s): 1
| |PDF (1628 KB)

The knowledge of induction generator models and their parameters has gained great importance in recently years. Induction generators have been widely used in several applications, including renewable energy systems, because of their simple construction and easy operation. A successful parameters estimation of induction generators strongly depends on the availability of a good initial parameter gue... View full abstract»

• ### A Nonlinear Analytical Model for the Rapid Prediction of the Torque of Synchronous Reluctance Machines

Publication Year: 2018, Page(s): 1
| |PDF (1176 KB)

The synchronous reluctance motor works under heavy saturation. This paper presents a nonlinear analytical model of the reluctance machine, which is used to derive both average and torque harmonics as a function of the rotor geometry. Maps showing the torque harmonics as a function of the rotor barrier angles are derived. These maps are useful tools for the machine designer to get a proper rotor ge... View full abstract»

• ### Multimodal Design Optimization of V-Shaped Magnet IPM Synchronous Machines

Publication Year: 2018, Page(s): 1
| |PDF (530 KB)

An algorithm is developed for multimodal design optimization of a V-shaped magnet Interior Permanent Magnet Synchronous Machine (IPMSM). This algorithm is capable of finding all the local and global minima of a given single- or multiobjective function. The paper demonstrates the algorithm to minimize the total active weight of an IPMSM while minimizing its losses considering mechanical, thermal, a... View full abstract»

• ### Design of Rotor Excited Axial Flux-Switching Permanent Magnet Machine

Publication Year: 2018, Page(s): 1
| |PDF (1355 KB)

In this paper, a new structure of permanent magnet axial flux-switching machine with segmented rotor has been introduced. The 12-pole stator has been installed between two 8-pole segmented rotors, and the excitation system has been connected to the rotor. This topology enhances the design of flux-switching permanent magnet machines. With this new topology, an increase in the torque density, the re... View full abstract»

• ### Considerations on the Effects that Core Material Machining has on an Electrical Machine's Performance

Publication Year: 2018, Page(s): 1
| |PDF (969 KB)

An often-overlooked aspect during the development process of electrical machines, is the validity and accuracy of the machine material properties being used at the design stage. Designers usually consider the data provided by the materials supplier, which is measured on material in an unprocessed state. However, the fact that the machining processes required to produce the finished product (e.g. t... View full abstract»

• ### Virtual Material Method for Enabling a Single 2d-FEA Simulation of Electrical Machine Sets

Publication Year: 2018, Page(s): 1
| |PDF (1804 KB)

When two or more electrical machines are electrically and mechanically interconnected, the implementation of a single 2d-FEA of the whole system is complex or even impossible. This is mainly due to the feature of commercially- available 2d-FEA software to use a domain depth equal for all the electrical machines drawn in the geometrical 2d-model. For any typology of rotating electrical machines, th... View full abstract»

• ### A Novel Fourth Order Generalized Integrator Based Control Scheme for Multifunctional SECS in the Distribution System

Publication Year: 2018, Page(s): 1
| |PDF (3150 KB)

This paper presents a novel fourth order generalized integrator using frequency locked loop (FOGI-FLL) based control algorithm for a single stage three phase grid interfaced solar energy conversion system (SECS) with distribution static compensation (DSTATCOM) capabilities. The proposed FOGI-FLL control algorithm suffices multifarious power quality objectives in the distribution network such as ha... View full abstract»

• ### Design of a Stator for a High-Speed Turbo-generator with Fixed Permanent Magnet Rotor Radius and Volt-Ampere Constraints

Publication Year: 2018, Page(s): 1
| |PDF (3101 KB)

This paper investigates high-speed surface PM machine design for portable turbo-generator applications. A magnet retention mechanism is used in the rotor due to high-speed operation, and the rotor radius is fixed to achieve certain optimal characteristics. The basis of this paper is to design the stator when the rotor radius has been fixed. The stator designs are populated by different slot/pole c... View full abstract»

• ### Decentralized Control of Offshore Wind Farms Connected to Diode-based HVDC Links

Publication Year: 2018, Page(s): 1
| |PDF (950 KB)

This paper presents a novel decentralized control for offshore wind farms connected to the onshore grid through a high voltage direct current link by means of a diode rectifier. The proposed control system is implemented in each wind turbine generator system (WTGS). The capacitor placed at the filter of the wind turbine front-end converter is used for the proposed control implementation. Frequency... View full abstract»

• ### Multidisciplinary Design of Ultra-High Speed Electric Machines

Publication Year: 2018, Page(s): 1
| |PDF (1453 KB)

This work presents the multidisciplinary algorithm of the ultra-high-speed electric machine design. The 123 W ultra-high-speed electric machine with 80 % efficiency was presented. The interrelated mechanical, thermal and electromagnetic calculations were made, the bearing type and the main design materials were determined. The created computer model and algorithm were verified experimentally. The ... View full abstract»

• ### A $H_infty$ Robust Active and Reactive Power Control Scheme for a PMSG based Wind Energy Conversion System

Publication Year: 2018, Page(s): 1
| |PDF (1205 KB)

This paper presents a new $H_infty$ based robust control scheme applied to a permanent magnet synchronous generator (PMSG) based wind energy conversion system (WECS) to regulate the active and reactive power. During the operation, parameters of the PMSG may vary which may lead to variation in the WECS dynamics, thus the control of active power and reactive power becom... View full abstract»

• ### Multi-Physics Design of a V-shape IPM Motor

Publication Year: 2018, Page(s): 1
| |PDF (1495 KB)

In this paper a multi-physics model is proposed for a multi-V-shape Interior Permanent Magnet (IPM) motor with concentrated winding. This work develops a non-linear magnetic model that computes the flux density in the motor. The analytical model includes several novel aspects: it takes into account the local saturation near the iron bridges, it proposes a method for modeling the concentrated tooth... View full abstract»

• ### Design Improvement of a small, Outer Rotor, Permanent Magnet Vernier Generator for Supplying Traffic Enforcement Camera

Publication Year: 2018, Page(s): 1
| |PDF (1008 KB)

Road speed cameras are usually used photovoltaic power plants especially in the areas with limited or no access to grid power. However, there are many areas in Iran that wind power is more accessible than solar energy. So, in this study a small Permanent Magnet Vernier Generator (PMVG) is designed to meet power concussion requirements of traffic enforcement camera. The designed generator is optimi... View full abstract»

• ### A Smooth Torque Control Strategy for Brushless DC Motor in Braking Operation

Publication Year: 2018, Page(s): 1
| |PDF (2607 KB)

In braking operation, when the unipolar modulation pattern is adopted by brushless DC motor (BLDCM), there exists not only the commutation torque ripple, but also a problem concerning controllability of braking torque. This paper conducts a research into eight unipolar modulation patterns and proposes a smooth braking torque control strategy for BLDCM. First, the controllability principle of braki... View full abstract»

• ### Optimal Charge Pattern for the High Performance Multi-Stage Constant Current Charge Method for the Li-ion Batteries

Publication Year: 2018, Page(s): 1
| |PDF (366 KB)

In this paper a method is introduced to find out the optimal charge pattern (OCP) of the multistage constant current (MSCC) charge method based on the equivalent circuit model of a Li-Ion battery. Unlike the conventional methods the proposed one does not require several kinds of time-consuming and labor-intensive experiments. The OCP can be simply calculated by the developed equations with the res... View full abstract»

• ### Synchronous Reluctance Machine Optimization for High Speed Applications

Publication Year: 2018, Page(s): 1
| |PDF (3365 KB)

The synchronous reluctance machines with transversally laminated rotor and multi flux-barriers per pole reach a high torque density, so that they are proposed as a valid alternative to permanent magnet machines. Such machines have been analyzed for different applications, mainly home appliance, industrial tool, traction, up to low-speed high-power generators. On the contrary, the use of synchronou... View full abstract»

• ### Frequency coupling characteristic modeling and stability analysis of doubly fed induction generator

Publication Year: 2018, Page(s): 1
| |PDF (1954 KB)

Impedance-based method is an effective method to analyze the system stability. Based on the impedance stability theory, a doubly fed induction generator (DFIG) based wind power generation system can be decoupled into a positive- and a negative-sequence subsystem. Then, under small-signal operation, each subsystem is assumed to have linear characteristic in the frequency domain. Therefore, a single... View full abstract»

• ### Multi-Agent System Based Microgrid Energy Management via Asynchronous Consensus ADMM

Publication Year: 2018, Page(s): 1
| |PDF (552 KB)

In this letter, an optimal operation model for a multi-agent system (MAS) based microgid is proposed. The objective is to save the overall energy cost represented as a sum of locally observable convex functions. An asynchronous and distributed alternating directions of multipliers method is developed for the MAS-based microgrid to solve the optimization problem with local timer and reach a converg... View full abstract»

• ### Simplified Model to Study the Induction Generator Effect of the Sub-Synchronous Resonance Phenomenon

Publication Year: 2018, Page(s): 1
| |PDF (3744 KB)

This letter presents a simple yet accurate model of induction machines able to appraise the induction generator effect of the sub-synchronous resonance phenomenon. The proposed model is general and can be applied to induction machines utilized in wind power applications, such as doubly-fed induction generators. A rigorous stability analysis is carried out based on the proposed model. This analysis... View full abstract»

• ### Analysis and Implementation of New Ironless Stator Axial-Flux Permanent Magnet Machine with Concentrated Non-overlapping Windings

Publication Year: 2018, Page(s): 1
| |PDF (1247 KB)

This paper presents integrated design and analysis of a new axial-flux permanent magnet (AFPM) machine, which consists of an ironless stator with double-layer concentrated non-overlapping windings and twin external rotors with Halbach-array PMs. A general sizing equation based on fundamental theory, easily adjustable for ironless stator AFPM machine with concentrated windings, is derived to obtain... View full abstract»

• ### Recent Advances and Developments in Dual Stator-Winding Induction Generator and System

Publication Year: 2018, Page(s): 1
| |PDF (999 KB)

Dual stator-winding induction generator (DWIG) is one kind of emerging multi-port electrical machines. It has become a promising direction in the last two decades, especially for stand-alone power systems and renewable energy power systems. This paper mainly focuses on the DWIG with similar-poles stator windings and cage-type rotor. An overview of DWIG and its system are given. Recent advances of ... View full abstract»

• ### Computationally Efficient and Flexible Magnetic-Field-Analysis-Based Scaling Strategy for Permanent Magnet Machines

Publication Year: 2018, Page(s): 1
| |PDF (2031 KB)

Electric machine performance (peak torque vs. speed) and efficiency characteristics are frequently estimated using magnetic finite element analysis (FEA). In this paper, it is shown that the governing mathematical relationships that are solved in such an analysis allow for the implementation of straightforward scaling laws. Instead of re-running the FEA code for a variety of electric machine lengt... View full abstract»

• ### Analysis of a Novel Transverse Laminated Rotor Flux Switching Machine

Publication Year: 2018, Page(s): 1
| |PDF (2249 KB)

Flux switching permanent magnet machines with a segmented rotor are attractive alternatives for high torque and power density and high-speed applications. However, the motor doubly salient structure generates high torque ripples. In order to mitigate this problem and enhance motor torque density, a new flux switching machine (FSM) topology with transverse laminated rotor segments (LRFSM) is propos... View full abstract»

• ### A Novel Dynamic Switching Table based Direct Power Control Strategy for Grid Connected Converters

Publication Year: 2018, Page(s): 1
| |PDF (7320 KB)

Direct Power Control (DPC) has gained much attention for medium voltage applications due to its fast power control capability. However, a conventional static switching table based DPC can lead to unsatisfactory response when the converter is connected to an electric grid because it is commonly designed assuming ideal and constant voltages of the grid and the dc-link. Therefore, the actual grid vol... View full abstract»

## Aims & Scope

The IEEE Transactions on Energy Conversion includes in its venue the research, development, design, application, construction, installation, operation, analysis and control of electric power generating and energy storage equipment (along with conventional, cogeneration, nuclear, distributed or renewable sources, central station and grid connection). The scope also includes electromechanical energy conversion, electric machinery, devices, systems and facilities for the safe, reliable, and economic generation and utilization of electrical energy for general industrial, commercial, public, and domestic consumption of electrical energy.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Juri Jatskevich
University of British Columbia