Presents the front cover for this issue of the publication.

Presents the table of contents for this issue of this publication.

Provides instructions and guidelines to prospective authors who wish to submit manuscripts.

In [1] , the fourth author’s biography should have read as follows.

Presents the front cover for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Presents the front cover for this issue of the publication.

Electrification of transportation systems continues to increase both to reduce the negative effect of petroleum-based transportation on the climate and the quality of life and to allow for enhanced safety and comfort of transportation at large. These developments are often subject to tight constraints on cost, mass, and volume. At the same time, the requirements on the reliability of the systems in

In this article, a hybrid-slot radial-flux dual-stator permanent-magnet machine (HS-RDPM) with fault-tolerant consideration is presented. On the one hand, the torque density of this structure is improved compared with conventional fault-tolerant permanent-magnet machines (FTPMs). On the other hand, both large torque ripple and weak phase isolation coming from dual stators are optimized. First, radial-flux

Efficiency and reliability are essential for isolated bidirectional dc–dc converters in electric vehicle (EV) battery charging systems. As one promising power interface between energy storage components and power bus, dual-active-bridge (DAB) dc–dc converters have gained wide applications due to the advantages of galvanic isolation, symmetric circuit structure, high power density, and easy control

These instructions give guidelines for preparing papers for this publication. Presents information for authors publishing in this journal.

Presents the 2020 subject/author index for this publication.

Electrification is a remarkable trend in the aviation industry; electric machines and power electronics systems have been increasingly embedded in aerospace applications. In this field, the above systems are mainly used in the flight control system, propulsion power system, engine starting/generating system, environmental control system, braking system, and fuel and hydraulic system. The power density

More electric aircraft is a promising solution to the problems of fuel consumption, emissions, and noise faced by the aviation industry. Electrical machines with high power density are essential to improve the overall performance of more electric aircraft. The huge difference between the maximum and the rated output of electrical machines shows that the performance does not reach the present limit

Power electronics are crucial elements in more-electric aircraft (MEA) applications. Existing hardware is almost exclusively silicon (Si)-based. However, recent advances in semiconductor technology yielded silicon carbide (SiC) components with current ratings suitable for aerospace applications. These devices have much strength that can increase power density and improve performance over Si-based hardware

Although many permanent magnet synchronous motors (PMSMs) are used as the driving source for aerospace applications, the motor and converter are not integrated. This leads to large volume and low power density of the system. This article proposes an SiC-based integrated modular motor drive (IMMD) as a potential solution, in which the SiC converter is placed at the end of the stator core of the motor

Active disturbance-rejection control (ADRC) as a current control (CC) method for ac drive systems has been recently shown to have significant strengths. Its robustness to system uncertainties and its high disturbance-rejection capability render it an attractive control scheme for various mobile applications. Until now, however, all the known tuning methods available in literature are based on a number

In this article, the dc filter design and optimization problem is studied for dc electrical power distribution systems onboard more-electric aircraft. Component sizing models are built to serve as the basis of the optimization whose objectives are mass and power loss of this filter. A categorization strategy of search and surrogate algorithms is proposed and used for the target multiobjective optimization

Electromechanical actuation of flight control surfaces based on permanent magnet synchronous motors (PMSMs) becomes an important technology for more electric aircraft architectures. Demanding requirements for fault tolerance and small space envelopes make sensorless control modes a promising technology in this field. However, sensorless rotor angle detection is not always feasible because it requires

Nonlinear mathematical model (NMM) of limited-angle torque motor (LATM) is rarely studied at present because its operating principle is different from conventional rotating electrical machines. In this article, inspired by the NMM of rotating electrical machines, a high-fidelity and computationally efficient model of LATM is proposed, which can completely consider the nonlinear effects, including the

Electrical machines and drives keep moving away from traditional technologies such as brushed machines and wound field machines toward lighter, “easier to maintain” machines. A very interesting aspect is that certain transport applications, especially the aerospace industry, still favor the classical wound field machine for its main generating system such as Boeing 787. This article focuses on investigating

The field winding-based flux adjustable permanent magnet (FWFAPM) machines, including the hybrid excitation (HE) topology and the memory topology, can offer excellent capabilities in terms of flux regulation, wide constant power operation as well as de-excitation (flux-weakening) under fault; thus, they are capable for use in More Electric Aircraft (MEA) generator systems. First, this article probes

This article proposes a compact pulsed power supply for specific loads such as laser weapons and electromagnetic (EM) field weapons on more electric aircraft. The power supply for this is a permanent magnet (PM) compensated pulsed alternator (CPA) with a Halbach array rotor. This article proposes a design for the special topology and working conditions of the PM CPA, including the calculation of the

In order to improve the fault-resilient capacity of the switched reluctance starter/generator systems, this article presents a fault diagnosis and tolerant strategy for position sensors of the system. The fault diagnosis method, based on capturing the pulse edges of the position signals, has very high flexibility and reliability. Moreover, a fault-tolerant control strategy for position sensors is proposed

To enhance the mechanical safety, guarantee sufficient temperature margin and reduce the high-frequency electromagnetic interference of the starter/generator embedded in the aero engine, a multiobjective optimization control method is proposed for the switched reluctance machine based on the model prediction and the torque sharing function (TSF). For the model predictive control, the instantaneous

More electric aircraft (MEA) is expected to optimize aircraft performance, and the switched reluctance starter/generator (SR S/G) system is recommended as a key technique for MEA implementation. In order to improve safety and reduce aircraft maintenance time, it is necessary to quickly identify and locate electrical faults in the electrical system. This article proposes a fault diagnosis method for

In this article, a new double-rotor multiwinding machine (DRMWM) that utilizes the flux modulation principle is proposed for propulsion system of hybrid electric aircrafts (HEAs). First, the operation principle of DRMWMs and the corresponding HEA propulsion configuration are introduced, where different operation modes of two rotors and three sets of windings of DRMWMs to cope with various flight tasks

The thermal management system has significant impacts on the efficiency of propulsion electric machines in the more electric aircraft. This article proposes a predictive thermal management system by utilizing the thermal-magnetic coupling phenomenon to improve efficiency. There are three major innovated contributions. First, the theoretical mathematic model of the temperature and the electromagnetic

Over the past few years, electric propulsion systems have been widely used in automotive applications. The next decade is likely to see the electrification of aerial vehicles. In the past 20 years, the passengers’ demand for air trips has increased by roughly 5% annually, and it leads to many problems such as emission, noise pollution, and airport capacity shortage. An electric airplane that can take

High-performance propulsion motors for more electric aircraft (MEA) are highly appreciated in transportation electrification. For the widely adopted permanent magnet synchronous machines (PMSMs) for MEA propulsion, the segmented Halbach magnetization has distinct merit that it contributes to sinusoidal air-gap magnetic fields for smooth operation. However, it is hard to fast predict the field distribution

This article presents a multiphase permanent magnet synchronous motor (PMSM) for the more electric aircraft propulsion. The stator winding of the motor is composed of multiple sets of multiphase windings with different parameters. The purpose of the motor design is to modify the distribution of the high-efficiency area of the motor by reasonably matching the winding parameters of each set, thereby

The finite control set (FCS) model predictive current control (MPCC) is a promising control scheme for the five-phase drives due to the easy-tuning process. However, the deteriorated operational performance and huge computational burden are the real challenges. This article proposes a multivector FCS-MPCC, which can improve the operational performances without increasing computational burden. In the

High-temperature superconductor (HTS) machine is a promising candidate for the electrical aircraft propulsion due to its great advantage in high power density. However, the HTS machine always suffers the problem of low thermal stability during quench. In this article, we apply a no-insulation (NI) coil technique on the rotor windings of HTS machines to enhance the stability and safety of the electrical

Deploying electrical systems for aircraft propulsion has been identified as a potential solution for reducing the environmental impact of increasing air transport usage. However, the implementation of this system needs to be done at a suitable voltage and current combination. The aim of this work is to propose a clear procedure for deriving a suitable voltage and current for an electrical propulsion

Electric machine for aircraft propulsion is required to have high power density and high reliability, but the harsh operating environment, such as low air pressure, will challenge the motor’s insulation system. This article presents the partial discharge (PD) investigation of the form-wound winding in high-frequency electric machines for electric aircraft propulsion. Experimental results show that

The electric revolution is underway in the transportation sector, and the aviation industry is poised to embrace fundamental disruption. Moving to electric aircraft brings undeniable benefits in terms of environmental impact, cost savings, maintenance, noise pollution, and safety. Nevertheless, several technical challenges are yet to be overcome to build electric airplanes that meet public needs while

To assess the performance of electrification in an aircraft, multiphysics modeling becomes a good choice for the design of more-electric equipment. However, the high computational cost and huge design space of this complex model lead to difficulties in the optimal design of the electrical power system, thus model simplification is mandatory. For this purpose, this article first proposes a novel model

One of the main areas of research for the more electric aircraft (MEA) is mounting a generator on the low-pressure (LP) shaft in addition to the starter/generator mounted on the high-pressure (HP) shaft. Given that there are electrical machines on both the LP and HP shafts, there is an “electrical bridge” to establish power exchange between the shafts. Potential improvements in the engine performance

The electrical power distribution system (EPDS) of the more electric aircraft (MEA) is a fundamental component that needs to be efficient and resilient. The commonly considered architectures feature separate buses to achieve separation between different subsections of the EPDS. Although effective, this implies an over design, since all subsections are sized for the local worst case scenarios. In the

In more electric aircraft (MEA), weight reduction and energy efficiency constitute the key figures. In addition, the safety and continuity of operation of its electrical power distribution system (EPDS) are of critical importance. These sets of desired features are in disagreement with each other because higher redundancy, needed to guarantee the safety of operation, implies additional weight. In fact

Multipulse ac/dc rectifiers (MPRs) are widely used in aviation applications due to their rugged structure, cost effective, and high-reliability features. In this article, an overview of the recent advances and trends on the MPR technology, mainly the autoconfigured transformer-based MPRs, and its application in more electric aircrafts is performed. This article covers system topologies, transformer

This article presents the state-of-the-art review of high-conversion high-voltage (HCHV) dc–dc converters for a modern aerial vehicle’s power distribution system. Higher dc bus voltages have become a trend in recent aerial vehicle development because of the potential reduction in size and weight of the rest of the power system and an increase in power density. Some front-end dc energy sources, such

In this article, a new two-switch, single-phase, power-factor-correction, discontinuous-conduction-mode boost rectifier that features zero-voltage switching turn on and can achieve less than 5% input-current total harmonic distortion (THD) by injecting a simple feedforward signal obtained from input and output voltages to the output voltage feedback control is introduced. Since low THD is achieved

A new three-phase Cuk-derived power factor corrected (PFC) converter with only three switches for more electric aircraft is presented. The proposed converter benefits limited components for its operation, and only one semiconductor from each phase is in the current conduction path throughout the converter operation that substantially reduces the conduction losses leading to high efficiency and low

More electric aircraft (MEA) has become the trend of future advanced aircraft for its potential to be more efficient and reliable. The optimal power management, thus, plays an important role in MEA, especially when using hybrid energy storage systems (HESSs). In this article, we propose a novel adaptive online power management (AOPM) algorithm for MEA, which aims to minimize the power fluctuation of

External disturbances, system uncertainties, and various load characteristics, e.g., deadtime effect, computation time delay, circuit parameter uncertainty, and the constant power load (CPL), can lead to tracking errors that even result in instability in the output voltage of dual-active-bridge (DAB) converters. To address those challenges and improve the output performance, an uncertainty and disturbance

Aircraft electrification requires novel designs to supply the growing demand for electric power onboard through efficient and reliable production and distribution of electrical energy. Moreover, the aircraft power system will be a key enabler for the integration of future technologies. Pledging to these intentions, we propose a formulation to synthesize a power system architecture that complies with

Superconductors have a potential application in future turboelectric distributed propulsion (TeDP) aircraft and present significant new challenges for protection system design. Electrical faults and cooling system failures can lead to temperature rises within a superconducting distribution network, which necessitates a reduction or temporary curtailment of current to loads to prevent thermal runaway

This article proposes a novel transverse-flux tubular linear switched reluctance (TF-TLSR) machine for long-stroke applications, in which the armature windings are placed on the short primary, while the long secondary is made of only low-cost iron ring. The key for the proposed machine is to innovatively introduce the complementary tooth structure into the primary salient-pole design and equip the

To improve the efficiency of a permanent magnet (PM) motor, it is usually required to extend the motor operation from linear to over or even six-step modulation regions based upon the space vector pulsewidth modulation technique. Traditionally, a PM motor is controlled by using the standard vector control technique. However, a recent study shows the decoupling inaccuracy of designing PM motor control

This article presents a new type of axial-field switched reluctance machine (AFSRM) and axial-field dual-rotor segmented switched reluctance machine (ADS-SRM), along with its design methodology. The proposed ADS-SRM is featured by the segmental stator and rotor poles, the auxiliary flux-conductive rings, and the concentrated windings. The yokeless topology reduces the active length of the motor. Besides

Homopolar inductor machine (HIM) has been applied in the field of flywheel energy storage system (FESS) due to its merits of simple structure, brushless exciting, and low idling losses. The rotor of HIM not only plays the role of energy conversion but also serves as a flywheel to store kinetic energy, which is different from other electrical machines used in FESS. Meanwhile, the HIM usually operates

The state-of-charge (SOC) estimation is an enabling technique for the efficient management and control of lithium-ion batteries (LIBs). This article proposes a novel method for online SOC estimation, which manifests itself with both high accuracy and low complexity. Particularly, the particle swarm optimization (PSO) algorithm is exploited to optimize the model parameters to ensure high modeling accuracy

The frequent icing of a catenary in cold areas has seriously affected the normal operation of urban rail transit. Among many deicing methods for catenary, the thermal deicing method that uses current Joule heat to melt ice has been widely adopted due to its efficiency and safety. However, most of the thermal deicing methods are only applicable when the line is out of service, which cannot solve the

The problem of high rail potential is common in urban rail transit lines that use running rail to return train current. At present, the research of rail potential mainly adopts modeling analysis. However, the rail potential results of the traditional model are generally far less than the actual situation, and the distribution is not accurate enough. It is difficult to predict the rail overvoltage in

In this study, an online fault diagnosis (FD) algorithm is developed to detect stator’s turn-to-turn faults (TTFs) in direct torque control (DTC)-driven induction motors (IMs) for the electric vehicle’s (EV) powertrains. The developed FD algorithm is based on the application of the discrete wavelet transformation (DWT) technique on the stator currents. Being a time–frequency domain-based algorithm

With numerous lithium-ion batteries retired from electric vehicles, the studies on the battery second usage are extremely imminent. However, existing screening approaches on plenty of cells fail to guarantee high efficiency and high accuracy simultaneously. This article proposes a quick and accurate screening method based on the improved fuzzy c-means (FCM) algorithm. First, the partial charging curve

To overcome the limitations that active disturbance rejection control (ADRC) system of a bearingless induction motor (BIM) has difficulty in tuning parameters depending on experience to select parameters, an ADRC strategy based on improved particle swarm optimization–genetic algorithm (IPSO-GA) is proposed. Based on the orientation of the air-gap magnetic field, the first-order and the second-order

Waste transport plays an important role in the decarbonization of the transport sector. In this article, diesel-powered collections vehicle (dWCV) and electric waste collections vehicle (eWCV) and their operation are analyzed regarding energy demand and total cost of ownership (TCO) integrating well-to-wheel emission costs. Furthermore, an open-source simulation tool with a route synthetization approach

The increasing prevalence of electric vehicles (EVs) and emerging dynamic wireless charging techniques have increased the interdependence between the power and transportation systems. This article investigates a new nexus scenario—the electrified highway network (EHN) and power transmission network (PTN). The independent but interrelated operation of the two networks is analyzed. On the EHN side, a