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The ever-increasing need for higher efficiency, smaller size, and lower cost make the analysis, understanding, and design of energy conversion systems extremely important, interesting, and even imperative. One of the most neglected features in the study of such systems is the effect of the inherent nonlinearities on the stability of the system. Due to these nonlinearities, these devices may exhibit undesirable and complex dynamics, which are the focus of many researchers. Even though a lot of research has taken place in this area during the last 20 years, it is still an active research topic for mainstream power engineers. This research has demonstrated that these systems can become unstable with a direct result in increased losses, extra subharmonics, and even uncontrollability/unobservability. The detailed study of these systems can help in the design of smaller, lighter, and less expensive converters that are particularly important in emerging areas of research like electric vehicles, smart grids, renewable energy sources, and others. The aim of this Special Issue is to cover control and nonlinear aspects of instabilities in different energy conversion systems: theoretical, analysis modelling, and practical solutions for such emerging applications. In this Special Issue, we present novel research works in different areas of the control and nonlinear dynamics of energy conversion systems.

multi-clearance --- neural network --- zero average dynamics --- Cable3D --- variable bus voltage MG --- explosion-magnetic generator --- quadratic boost --- matrix norm --- coordinated control system --- permanent magnet synchronous motor (PMSM) --- photovoltaic (PV) --- power conversion --- capacitance current pulse train control --- air gap eccentricity --- high step-up voltage gain --- voltage ripple --- offset-free --- goal representation heuristic dynamic programming (GrHDP) --- current mode control --- sliding mode observer (SMO) --- multi-model predictive control --- combined heat and power unit --- discontinuous conduction mode (DCM) --- current-pulse formation --- sliding mode control --- single artificial neuron goal representation heuristic dynamic programming (SAN-GrHDP) --- subharmonic oscillations --- DC micro grid --- supply air temperature --- air-handling unit (AHU) --- vibration characteristics --- magnetic saturation --- slope compensation --- fixed-point inducting control --- the load of suspension point in the z direction --- variable switching frequency DC-DC converters --- droop control --- Helmholtz number --- plasma accelerator --- contraction analysis --- sliding control --- bifurcations in control parameter --- disturbance observer --- DC motor --- multiphysics --- virtual impedance --- pulverizing system --- ultrahigh voltage conversion ratio --- corrugated pipe --- DC-DC converters --- maximum power point tracking (MPPT) --- dynamic model --- nonlinear dynamics --- new step-up converter --- micro-grid --- global stability --- extended back electromotive force (EEMF) --- small-signal model --- electromagnetic vibration --- nonlinear dynamic model --- excited modes --- data-driven --- rigid body rotation --- position sensorless --- prediction --- centralized vs. decentralized control --- inferential control --- boost-flyback converter --- calculation method --- switched reluctance generator --- monodromy matrix --- bridgeless converter --- decoupling control --- distributed architecture --- wave --- buck converter --- soft sensor --- model–plant mismatches --- whistling noise --- efficiency optimization --- steel catenary riser --- moving horizon estimation --- single artificial neuron (SAN) --- space mechanism --- two-stage bypass --- electrical machine --- harmonic suppression --- local vs. global optimization --- performance recovery --- reinforcement learning (RL) --- adaptive dynamic programming (ADP) --- overvoltage --- planetary gears --- maximum power point tracking --- DC-DC buck converter --- power quality --- average-current mode control --- feedback coefficient --- power factor correction (PFC) --- capacitance current --- predictive control --- rotor dynamics

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The Special Issue "Industrial and Technological Applications of Power Electronics Systems" focuses on: - new strategies of control for electric machines, including sensorless control and fault diagnosis; - existing and emerging industrial applications of GaN and SiC-based converters; - modern methods for electromagnetic compatibility. The book covers topics such as control systems, fault diagnosis, converters, inverters, and electromagnetic interference in power electronics systems. The Special Issue includes 19 scientific papers by industry experts and worldwide professors in the area of electrical engineering.

Research & information: general --- Technology: general issues --- active disturbance rejection controller (ADRC) --- direct torque control (DTC) --- full-order observer --- sensorless --- six-phase induction motor (6PIM) --- stator resistance estimator --- average air gap length --- dc-dc power converters --- gapped magnetic core --- magnetic permeability --- magnetizing inductance --- medium frequency transformer --- systems control --- electromagnetic compatibility --- conducted interference --- DC-DC power converters --- FPGA --- random modulation --- bidirectional converter --- multilevel converter --- resonant converter --- SiC MOSFET --- high-voltage converter --- switched capacitor converter --- extended Kalman filter (EKF) --- permanent magnet synchronous generator (PMSG) --- fault diagnosis (FD) --- stator inter-turn short circuit --- conducted electromagnetic interference --- aggregated electromagnetic interference --- power electronic interfaces --- frequency beat --- modular --- voltage source inverter (VSI) --- multipulse --- 12-pulse --- pulse amplitude modulation (PAM) --- pulse width modulation (PWM) --- three-level --- coupled reactors --- wireless power transfer --- inductive power transmission --- AC-DC power converters --- T-type inverter --- GaN-transistors --- electromagnetic coupling --- EV battery --- electric vehicles --- fast battery charging --- local transport --- DC micro grid --- drive voltage frequency converter --- big power DC/DC converter --- interior permanent magnet motors --- maximum torque per ampere --- sensorless control --- adaptive control --- resonant inverter --- dielectric barrier discharge --- nonthermal plasma --- treatment of plastic surface --- decontamination of organic loose products --- silicon carbide --- dual active bridge dc-dc converter --- power electronic traction transformer --- 3 kV DC railway traction --- electric multiple unit --- DC-DC converter --- high-voltage-gain converter --- switched-capacitor converter --- inductiveless converter --- series active power filters --- multipulse converters --- power conditioning --- power quality --- power distribution --- reverse power flow --- compensation for nonactive current --- voltage regulation --- UPQC --- boost converters --- DC–DC power converters --- GaN switch --- resonant power conversion --- zero-current switching (ZCS) --- zero-voltage switching (ZVS) --- grasshopper optimization algorithm (GOA) --- particle swarm optimization (PSO) --- selective harmonics elimination PWM (SHEPWM) --- square-type matrix converters --- pulse width modulation --- multiphase systems --- matrix converter --- multipulse voltage converter --- nearest voltage modulation --- pulse width regulation --- low-switching modulation technique --- multipulse matrix converter with coupled reactors