Results 61 to 70 of about 1,432 (200)
High Voltage, EarlyView.ABSTRACT The emergence of (ultra)wide bandgap ((U)WBG)‐based devices has significantly enhanced performance in high‐frequency switching applications, enabling breakthroughs in electric transportation, aerospace, and renewable energy systems. However, it also presents considerable challenges to insulation systems, such as electric motor winding ...
Easir Arafat +3 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang +7 more
wiley +1 more source
IEEE Access, 2019 The mechanism of overvoltage formation in the breaking process of a dry-type air-core shunt reactor (DTACSR) is studied in this paper. In addition, the effect of the overvoltage on the interturn insulation characteristics of the DTACSR is also discussed.
Hongyan Nie +5 more
doaj +1 more source
High Voltage, EarlyView.ABSTRACT The double‐break vacuum circuit breakers (VCBs) that utilize series break technology effectively increase the switching capability for capacitive currents, elevate the withstand voltage level, and reduce the likelihood of restrike, all without compromising the breaking capacity for short‐circuit currents.
Yun Geng +6 more
wiley +1 more source
Motor overvoltage mitigation using SiC-based zero-voltage switching inverter [PDF]
The motor overvoltage phenomenon is an issue that may arise from the high voltage slew rates ( dv/dt ) of silicon carbide MOSFETs in cable-fed drives. This can lead to substantial strain on cable and motor insulation, resulting from partial discharges ...
Ugalde Loo, Carlos +2 more
core +1 more source
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source
Advanced Science, Volume 13, Issue 34, 19 June 2026.Inspired by the mimosa, this study develops a flexible triboelectric nanogenerator with a novel microneedle array and battery‐mimetic architecture. The device introduces a spontaneous charge self‐regulation mechanism that confines the electric field below the air breakdown threshold, and achieves an outstanding charge density of 396.50 µC m−2 ...
Hanpeng Gao +7 more
wiley +1 more source
Energies, 2020 Power system load growth and transmission corridor constraints are driving industry activity in the area of high surge impedance loading (HSIL). Examples include compact structure design and uprating existing transmission lines.
Jon T. Leman, Robert G. Olsen
doaj +1 more source
Chemistry–Methods, Volume 6, Issue 6, June 2026.Thermal impedance spectroscopy is used to obtain the thermal parameters of a battery cell. Here, by utilising the cell temperature, the influence of thermal gradients on the resulting measurement is minimised, avoiding negative real values at all frequency points. The paper, therefore, compares multiple cell states and formats to gain insights into the
Dominik Droese, Julia Kowal
wiley +1 more source
Non-parasitic induced transient overvoltage in ANPC topology due to critical switching sequences
, 2023 25542563This paper describes a semiconductor overvoltage in an Active-Neutral-Point-Clamped Converter (ANPC). This overvoltage occurs in case of inductive load when the output voltage of the ANPC changes its polarity.
Kragl, Robert +3 more
core