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

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

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

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

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

Two-level voltage source inverters are the mainstream solution for many power applications. The conventional modulation method of such inverters is the single-carrier pulsewidth modulation (PWM) technique. In this article, the usage of a generalized PWM method with three independent carriers is analyzed. The carrier phase-displacement angles are evaluated in order to reduce the common-mode voltage

We present a hierarchical deep reinforcement learning (DRL) framework with prominent sampling efficiency and sim-to-real transfer ability for fast and safe navigation: the low-level DRL policy enables the robot to move toward the target position and keep a safe distance to obstacles simultaneously; the high-level DRL policy is supplemented to further enhance the navigation safety. We select a waypoint

This article proposes an improved model predictive torque control (MPTC) strategy for switched reluctance motor (SRM) drives with candidate voltage vectors (CVVs) optimization, which can suppress the torque ripple effectively and enhance the system efficiency. This MPTC method is improved by three aspects. First, the flux linkage calculation is removed compared to conventional MPTC. Second, the electric

In surface-mounted permanent magnet synchronous motor (SPMSM) low-speed sensorless control, the high-frequency sinusoidal voltage injection method for rotor position estimation is affected by the low saturation salient rate of SPMSM and the system delay, resulting in estimation error. This article proposes a dual-demodulation method utilizing the high-frequency positive- and negative-sequence stator

The reliable extinguishment of a single phase-to-ground arc is the key issue for safe and reliable operation in the distribution network. However, since the existing arc suppression methods are normally affected by the line parameters, the residual current (RC) at the grounding point still exists, then the grounding arc is hard to be extinguished reliably. Thus, an adaptive active voltage-type arc

A soft-switched current-fed dual-input isolated dc–dc converter topology is proposed in this article. This converter integrates two low-voltage dc sources with similar transferred characteristics such as two PV panels or two batteries into a dc bus using a simple circuit topology and a minimum number of active and passive components. The energy transfer between the input and output ports is controlled

In this article, a quasi-constant switching frequency zero voltage switching (ZVS) control strategy is proposed for three-phase grid-connected inverters. Full ZVS range can be achieved for all the switches at any load, modulation index, and power factor using discontinuous pulsewidth modulation. No additional high-frequency sensor or auxiliary circuit is needed. The switching frequency is constant

The reliability of the multichip insulated gate bipolar transistor (IGBT) modules has been a concern. Condition monitoring is an effective approach to enhance reliability and improve the quality of customer service. This article proposes a method for monitoring the chip branch failure due to bond wires fatigue in the multichip IGBT modules. The idea is based on the cumulative effect of the gate charge

The harmonic impedance of traction power supply systems (TPSSs) is a crucial parameter in identifying, preventing and suppressing high-order harmonic resonances. This article proposes a TPSS harmonic impedance identification method considering the harmonic lateral propagation between two adjacent feeding sections. An operation mode determination method and an improved mean shift clustering are presented

Fault detection for distributed parameter systems (DPSs) reported so far is model based in general, and the performance heavily relies on the prior known model information. This restricts the usability of these methods in industrial applications. In this article, we make the first attempt to establish a brand-new framework that contains both online systems modeling and the fault detection of unknown

This article presents and validates a method for early estimation of the high-frequency impedance response for a real permanent magnet synchronous machine. The main contribution of this work lies in the simplicity of the data required to tackle the prediction, which do not require any experimental tuning or 3-D simulations. The required inputs for the method are the 2-D cross section of the machine

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

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

A cascade controller architecture is designed to realize the attitude control of quadrotor with unknown disturbances in this article. The cascade controller integrates the advantages of the triple-step method and a nonlinear integral sliding mode. In the inner loop, an extended high-gain observer is designed to estimate total disturbance, including model uncertainty and external wind disturbance, in

In this article, analytical methods are proposed for the location of a short circuit fault in a power cable using sweep frequency response analysis (SFRA). The impedance spectroscopy is estimated using classical transmission line theory, whereas the driving point impedance function of the cable is proposed to be constructed either by using experimental SFRA data or analytically from the knowledge of

The induction machine (IM) is commonly adopted in the industry, which plays an important role in energy conversion between mechanical and electrical power. This article proposes a power electronic converter based IM power hardware-in-the-loop (PHIL) emulator, which can emulate an IM with internal faults. The risk, time, and cost associated with generating real faults can be reduced, helping to overcome

In this article, we analyze the back electromotive force (EMF) harmonic characteristics influenced by the slot–pole combinations in permanent magnet vernier motors for in-wheel drive applications. First, the feasible matches among the slot–pole combinations, stator tooth types, as well as winding topologies are given. Second, the expressions of fundamental and harmonic back EMF are then derived, where

This article introduces a novel algorithm for suppression of phase current harmonics in three-phase sinusoidal surface-mounted permanent magnet synchronous machines (SPMSMs) caused by nonideal back EMF waveform and dead time effects. Proposed feedback acquisition chain obtains an exact information on all the relevant harmonics within each period of the fundamental. Design of the harmonic current controller

The urgent need for the safer operation of inverter-fed motors is leading research to the qualification tests under high frequency rectangular wave voltages. Consequently, the generation of rectangular wave voltages with adjustable parameters has become a major concern for manufacturers and researchers. This article presents a design of high frequency and high voltage pulse generator able to provide

In the optimal control of induction motors, it is a challenging task to maintain the optimal torque over the varying operation conditions. This paper proposes a parameter lookup table generating method, that can achieve an optimal torque over a wide range of currents and speeds, even though the commands of current are not set correctly. Based on the motor’s testing data, this method uses a reinforcement-learning

In this article, we propose a new scheme to use active flux on the q -axis for sensorless control of synchronous reluctance machines (SynRMs). Conventionally, “active flux” on the d -axis is adopted to convert a salient-pole machine into a fictitious nonsalient-pole machine. However, the injected d -axis flux can deteriorate high-frequency injection (HFI) sensorless control performance or even run

This article proposes pulse width modulation (PWM) methods for low inductance brushless dc (BLDC) motor drives that minimize the commutation torque ripples. An uneven current of noncommutation phase generates the commutation torque ripples. In the low inductance BLDC motor drives, two types of time delays in PWM also induce critical torque ripples. In this article, the analyses of the time delays in

The coordination configuration of current-limiting inductors (CLIs) and hybrid dc circuit breakers (HCBs) is currently the most commonly used fault handling method to ensure fault ride-through of multi-terminal dc grids after the dc-side fault occurs. However, the high cost of HCB limits its large-scale application. In addition, the installation of the large CLIs will adversely affect the HCB performance

Renewable energy sources such as fuel cells and photovoltaics (PV) modules are widely installed in recent years. Due to these sources’ characteristics such as low port voltage, current-harmonic-sensitive, and weak short-circuit withstanding capability, their interface converters usually require high voltage gains, low high-frequency (HF) current harmonics, and short-circuit protection. At present,

In the single-sensor grid-following control of LCL -type grid-connected inverters, extended observers, which behave as “virtual sensors,” are typically employed for active damping, disturbance rejection, current tracking, and grid synchronization. However, most of the existing observer-based single-sensor control schemes choose grid current as the system measurement and output, and the performance

This article explores a set of locomotion optimization methods for a novel tendon-driven robotic fish. With the typical features of the dual tendon driving active tail and variable stiffness passive caudal fin, a fully functioning tendon-drive robotic fish is developed. Next, a practical dynamic model for the tendon-driven robotic fish is established with full consideration of variable stiffness passive

The performance of the trajectory estimation with a single beacon highly depends on the observability of the system, which is further determined by the excitation patterns of the robot. Because the desired excitation patterns regarding specific observability conditions cannot always be guaranteed in real-time, the trajectory estimation may casually fail with divergence. To tackle this issue, indirectly

In this work, we propose a haptic shared control framework that integrates human and robotic control to track moving objects. Uncertainty in object detection is estimated with a Kalman filter. An obstacle avoidance algorithm is designed in conjunction with the artificial potential field method. The operator input and robot’s historical trajectory are taken into consideration and used to infer the human

The high-pressure environment of deep-sea challenges the miniaturization of underwater robots due to the assembly of antihydropressure devices for protecting the electromagnetic motor. Here, inspired by the motion principle of jellyfish, a novel piezoelectric pulsed-jet actuator (PJA) was proposed as the power source. Six PJAs were arranged crosswise to form an antihydropressure miniature cross-shaped

This article presents a prototype of a planar aligned transverse flux machine with spatially distributed phases. This topology enables a flatter assembly space compared to typical transverse flux machines and, additionally, features a reduction gear. This makes it a suitable solution for low-speed high-torque applications primarily found in medical or industrial robotic surroundings. The exemplary

Long-term localization is an essential task for unmanned ground vehicles; however, it suffers from scene changes due to various environmental conditions (e.g., lighting conditions, seasonal shifts, viewpoint changes, or occlusions). In this article, we propose a novel end-to-end localizer for robust long-term localization in changing environments. First, a lightweight two-head place classification

In existing sliding mode control (SMC) methods, a disturbance observer (DOB) is employed to achieve disturbance rejection and reduce chattering, which is a major disadvantage associated with SMC and increases with increasing switching gain. However, the disturbance in a DOB associated with SMC is typically estimated using a control input that exhibits chattering. Although the existing methods can reduce

The diagnosis of permanent magnet synchronous motor (PMSM) faults has been the subject of much research in recent years, due to the growing reliability and safety requirements for drive systems. This article concerns PMSM stator winding fault detection and classification. A novel intelligent diagnosis approach is proposed, based on the bispectrum analysis of a stator phase current and the convolutional

Investigation of silicon carbide (SiC) mosfet s short-circuit (SC) degradation mechanism is critical to improve the overall reliability of power converters. At present, research on the SiC mosfet s degradation mechanism mainly focuses on the on -state phase of the SC period. While, ruggedness of SiC mosfet s in the off -state phase of short-circuit tests (SCTs) were neglected. In this article, SiC

Condition monitoring (CM) of machinery is important for ensuring the reliability of industrial processes. To adapt to the rareness of data from faulted machinery, semisupervised CM can be implemented by training on only healthy samples. However, the performance of CM can be impaired by the variability of operating data acquired from complex machinery. Additionally, the accuracy of results is limited

This article proposes a fast adaptive S-transform (FAST) to improve the time-frequency resolution and computational efficiency of power quality disturbances (PQDs) feature extraction. By directly controlling the standard deviation instead of other parameters, FAST can reduce the difficulty of optimizing time-frequency resolution. Based on the frequency spectrum of PQD signals, FAST only needs to calculate

Among the exiting multifunctional photovoltaic (PV) inverters (MPVIs), the main challenges are low efficiency, undesired harmonic emission, and weak compensation capability. In this article, a theoretical study via rotating phasor to the PV curves is first proposed to figure out the undesired harmonic emission puzzle in different PV inverters as well as to provide the foundation for PV inverters to

This article investigates the influence of multiphase winding topologies in high-power ultrahigh-speed machines (HP-UHSM) of 500 kr/min. At this speed level, increasing the rotor's magnetic loading excites its critical bending resonances and leads to structural breakdown. On the other hand, increasing the stator's electric loading using the three-phase winding increases unwanted vibrations in a slotted

This article presents a design and systems level implementation of a magnetic resonance-based wireless power transfer system with a novel metasurface layer. This layer shapes the magnetic field through it that results in “MetaResonance.” This phenomenon is key in transforming an existing surface into an intelligent wireless charger for the following: 1) reconfigurable and on-demand energy shaping that

The emergence of power electronics has lead to a paradigm shift toward dc grids, which are widely recognized to provide better performance and efficiency. However, fault isolation is one of the prime challenges of dc grids due to the absence of current zero-crossing. With this motivation, this article introduces a novel silicon-controlled-rectifier-based bidirectional dc solid-state circuit breaker

In this article, we present a novel three-phase multilevel inverter (MLI) design for photovoltaic applications which does not require large dc-link capacitors to buffer the 120-Hz power ripple and allows individual inverter module to process trapezoidal power instead of sinusoidal power. This new design features two inverters connected in parallel to each dc source and N inverters connected in series

The pseudo-continuous conduction mode four-switch buck–boost (FSBB) converter with negative valley inductor current is suitable for applications where zero-voltage-switching (ZVS) and voltage step-up and step-down are required. To improve its efficiency, many ZVS modulation schemes have been proposed to minimize the root mean square (rms) inductor current. However, when both input and output voltage

As an important topic of power system protection, protection algorithm for transmission lines connecting modular multilevel converter (MMC)-based converter stations has attracted extensive attention. This article proposes a new time-domain pilot protection based on two-dimensional (2-D) space projection of dual differential currents for lines connecting converter stations. The dual differential currents

In this article, we propose a purely electromagnetic propulsion unit (meaning that no mechanical gear is considered to transfer its torque or speed). This propulsion system is obtained based on an electric motor with an integrated magnetic multiplier electrical machine with integrated magnetic multiplier (EMIMM)—multiplier stands for speed multiplication. The EMIMM is offering two levels of torque

This article proposes a doubly salient machine (DSM) with subslot bottom permanent magnets (PMs) to enhance the torque production. The key is that with auxiliary slot-PM excitation, the stator yoke dc saturation can be mitigated to enhance the torque production capability of dc field excitation, meanwhile additional slot-PM flux can be pushed into the airgap, which can build a parallel excitation and

This article presents a novel parallel-excited dual-PM reluctance machine with enhanced torque and efficiency performance. The key is to build an integrated magnetic field with two sets of PM excitation sources in both stator yoke and slot openings. Two excitation sources produce a parallel magnetic field, which contributes to a superimposed magnetic flux in the airgap, thus leading to strengthened