This article presents a delay-suppressed sliding-mode observer (SMO) to observe the real-time rotor position of permanent magnet synchronous machine (PMSM) controlled by vector control algorithms. First, in order solve low-pass filter (LPF) delay problem existing traditional signum function-based SMO, brand new hyperbolic function is initially selected as switching function. Because with proper boundary layer capable reducing chattering phenomenon an it not necessary reemploy LPFs eliminate...

In this paper, from a new perspective of flux and charge, we present in-depth analyses two ideal memristor emulators the fifth-order memristive Chua's circuit constructed based on them. The constitutive flux-charge relations adopted are first formulated, their initial-dependent characteristics numerically revealed experimentally verified. Thereafter, with these relations, third-order dimensionality decreasing model for is constructed, in which five extra constant system parameters introduced...

In this paper, fault diagnosis and fault-tolerant control strategies have been studied comprehensively for dual three-phase permanent-magnet synchronous motor (PMSM) drives to improve the reliability. Based on direct torque (DTC) with space vector modulation, a series of diagnostic tolerant methods proposed five types faults, namely, speed-sensor fault, dc-link voltage-sensor current-sensor open-phase open-switch fault. First, schemes are by estimating rotor angle speed rotating stator flux....

For wireless power transfer (WPT) systems, communication between the primary side and pickup is a challenge because of large air gap magnetic interferences. A novel method, which integrates bidirectional data into high-power WPT system, proposed in this paper. The share same inductive link coreless coils. Power/data frequency division multiplexing technique applied, are transmitted by employing different carriers controlled independently. circuit model multiband system provided to analyze...

As key component for the flexible dc distributed power system, dual active bridge (DAB)-converter-based solid-state transformer (SST) with high efficiency a wide operating range is essential. However, traditional phase-shift control, backflow and current stress will significantly affect conversion efficiency. In this paper, characteristics in both sides of DAB-based SST converters are comprehensively analyzed. On basis, complete transmission power, peak mathematical models established. Then,...

This paper proposes an in situ diagnostic and prognostic (D&P) technology to monitor the health condition of insulated gate bipolar transistors (IGBTs) used EVs with a focus on IGBTs' solder layer fatigue. thermal impedance junction temperature can be as indicators for through-life monitoring (CM) where terminal characteristics are measured devices' internal temperature-sensitive parameters employed sensors estimate temperature. An auxiliary power supply unit, which converted from battery's...

In this paper, the built-in transformer voltage multiplier cell is inserted into each phase of conventional interleaved boost converter to provide additional control freedom for gain extension without extreme duty cycle. The only composed windings, diodes and small capacitors. And active switches are not required simplify circuit configuration. Furthermore, switch stress diode peak current also minimized due cells improve conversion efficiency. Moreover, there no reverse-recovery problem...

System efficiency and cost effectiveness are of critical importance for photovoltaic (PV) systems. This paper addresses the two issues by developing a novel three-port dc-dc converter stand-alone PV systems, based on an improved Flyback-Forward topology. It provides compact single-unit solution with combined feature optimized maximum power point tracking (MPPT), high step-up ratio, galvanic isolation, multiple operating modes domestic aerospace applications. A theoretical analysis is...

Plug-in hybrid electric vehicles (PHEVs) provide much promise in reducing greenhouse gas emissions and, thus, are a focal point of research and development. Existing on-board charging capacity is effective but requires the use several power conversion devices converters, which reduce reliability cost efficiency. This paper presents novel three-phase switched reluctance (SR) motor drive with integrated functions (including internal combustion engine grid charging). The electrical energy flow...

Photovoltaic (PV) solar power generation is proven to be effective and sustainable but currently hampered by relatively high costs low conversion efficiency. This paper addresses both issues presenting a low-cost efficient temperature distribution analysis for identifying PV module mismatch faults thermography. Mismatch reduce the output cause potential damage cells. first defines three fault categories in terms of levels, which lead different terminal characteristics modules. The...

Switched reluctance motors (SRMs) are gaining in popularity because of their robustness, low cost, and excellent high-speed characteristics. However, they known to cause vibration noise primarily due the radial pulsating force resulting from double-saliency structure. This paper investigates effect skewing stator and/or rotor on reduction three-phase SRMs by developing four 12/8-pole SRMs, including a conventional SRM, skewed rotor-SRM (SR-SRM), stator-SRM (SS-SRM), (SSR-SRM). The...

This paper presents an integrated multilevel converter of switched reluctance motors (SRMs) fed by a modular front-end circuit for plug-in hybrid electric vehicle (PHEV) applications. Several operating modes can be achieved changing the ON-OFF states switches in circuit. In generator driving mode, battery bank is employed to elevate phase voltage fast excitation and demagnetization. reconfigured as four-level converter, capacitor used additional charge produce outputs, which enhances torque...

This paper proposes a modular multilevel converter (MMC) based switched reluctance motor (SRM) drive with decentralized battery energy storage system for hybrid electric vehicle applications. In the proposed drive, cell and half-bridge is connected as submodule (SM), multiple SMs are together MMC. The full-bridge employed to motor. Flexible charging discharging functions each SM obtained by controlling switches in SMs. Multiple working modes achieved. Compared conventional existing SRM...

This paper deals with an optimized three-level modulated phase shift control using particle swarm optimization (PSO) strategy based on the unified phasor analysis aim to improve efficiency of bidirectional dual active bridge (DAB) converter for whole operation range. A mathematical model Fourier transform is built DAB converter. All possible states under are covered. Accurate complex expressions inductor current, transmission power, and reactive power obtained. Both modulus angle variables...

Insulated-gate bipolar transistor (IGBT) power modules find widespread use in numerous conversion applications where their reliability is of significant concern. Standard IGBT are fabricated for general-purpose while little has been designed bespoke applications. However, conventional design IGBTs can be improved by the multiobjective optimization technique. This paper proposes a novel method to consider die-attachment solder failures induced short cycling and baseplate fatigue thermal which...

This paper presents a novel reactive-power minimization method under the three-level modulated phase-shift control to improve efficiency for wide operation condition. First, in order unify all modes, mathematic model of dual-active-bridge converter with by harmonic analysis is obtained. Then, detailed odd-order components active and reactive powers varied multiple dimensions presented. The soft-switching boundaries respect voltage ratio unified power are specified. On this basis, optimal...

Photovoltaic (PV) stations have been widely built in the world to utilize solar energy directly. In order reduce capital and operational costs, early fault diagnosis is playing an increasingly important role by enabling long effective operation of PV arrays. This paper analyzes terminal characteristics faulty strings arrays, it develops a array technique. The current-voltage curve divided into two sections, i.e., high-voltage low-voltage sections. corresponding working points healthy string...

This brief presents a simple third-order inductor-free memristive chaotic circuit, which is derived from second-order active band pass filter (BPF) by replacing resistor with an improved memristor and has only three op-amps, two multipliers, capacitors, six resistors. The circuit unstable saddle-foci exhibits complex dynamical behaviors, including period, chaos, period doubling bifurcation, coexisting bifurcation modes, constant Lyapunov exponents (CLEs). Especially, the property of CLEs...

When the photovoltaic (PV) string is under partial shading condition (PSC), conventional maximum power point tracking (MPPT) techniques may fail to track global (GMPP). Although some MPPT (GMPPT) have been proposed, they overlook GMPP and detect PSC occurrence. Therefore, a novel GMPPT technique proposed in this paper by modifying beta method. The more accurate than previous since it can guarantee that all peaks β range never GMPP. Furthermore, inherently occurrence without setting any...