One of the difficulties with PWM switching converters is high switching loss and electromagnetic interference due to switching at non-zero voltage and current, which limits the operating frequency. In order to reduce the converter volume and weight (by increasing the frequency) and reducing switching losses, zero voltage and current switching methods are recommended. In this paper, four main ze...

Switching overvoltages (SOV) are considered a possible source of component failures experienced in existing offshore wind farms (OWFs). The inclusion of sufficiently accurate and validated models of the main electrical components in the OWF in the simulation tool is therefore an important issue in order to ensure reliable switching operations. Transient measurement results in an OWF are compare...

This research article addresses the evaluation of power conversion on heavy payload tethered hexarotors where the payloads are high and hovering times are long. Modifications were added to the power conversion unit based on operation reliability perspective. Since the objective power conversion is large comparing to existing tethered UAVs today, a strategic engineering approach was proposed and...

This paper addresses the problem of uncertain fuzzy intermittent extended dissipative control to stabilize flexible spacecraft (FS). However, systems with actuator random failures, input saturation and Bernoulli stochastic distribution by utilizing a novel switching Lyapunov function method. Compared existing common Lyapuonv function, proposed approach is convenient for us exploit more informat...

An electric bus system has been operating in the downtown area of Chattanooga, Tennessee for more than four years. The buses use traditional hard-switched IGBT inverters driving special induction motors with a speed sensor (tachometer) and two embedded fluxsensing windings to provide rotor speed and flux information to the motor controller for implementation of high performance field oriented c...

| Switching noise is one of the major sources of timing errors and functional hazards in logic circuits. It is caused by the cumulative e ect of microscopic spurious currents present in all devices during logic transitions. These currents are injected into the substrate and in supply lines, resulting in signi cant ripple noise. Individually, such micro-currents, do not usually cause catastrophi...

The persistence of aggressive criminal behavior is recurrently observed in offenders despite being previously advised on the negative consequences of their actions. One possible explanation for the continuation of aggressive behaviors could be that they are the consequence of either possible deficits in cognitive flexibility (set-shifting) or in altered feedback processing. Event-related brain ...

Worldwide many electrical equipment insulation failures have been reported caused by switching operations, while those equipments had previously passed all the standard tests and complied with all quality requirements. The problem is mostly associated with high-frequency overvoltages generated during opening or closing of a switching device. The transients generated during switching operations ...

The commutation failure of high voltage direct current (HVDC) systems could lead to unstable operation the alternating current/direct (AC/DC) hybrid power grid. distortion caused by harmonics is a considerable but unclear factor failure. According control switching process HVDC systems, voltage-time area method employed analyze and reveal influence mechanism harmonic components on first subsequ...