Results 51 to 60 of about 263,888 (208)
Position estimation delays in signal injection-based sensorless PMSM drives [PDF]
, 2012 The causes of position estimation delays and their effects on the sensorless control of permanent magnet synchronous motor drives are investigated. The position of a permanent magnet synchronous machine is estimated via the injection of high frequency ...
Altomare, A. +3 more
core +1 more source
Kongzhi Yu Xinxi Jishu, 2013 This paper illustrated var and negative sequence comprehensive compensation principles of cascaded static var generator(SVG) with star-configuration. The mathematical expression of zero-sequence voltage was deduced, and subsequently zero-sequence voltage
XIONG Qiaopo, LUO An, ZENG Zhizhen
doaj
IEEE Access, 2022 In the neutral ungrounded distribution network, the removal of permanent single-line-to-ground (SLG) fault easily leads to saturation of the electromagnetic voltage transformers (PT), which may cause ferroresonance overvoltage and PT failure.
Pan Lu +6 more
doaj +1 more source
Turn-to-turn fault protection technique for synchronous machines without additional voltage transformers [PDF]
, 2017 This paper presents a novel protection technique for the detection of inter-turn faults in synchronous machines. It is based on the calculation of voltage in the stator windings from the usual phases and neutral voltage, typically available in ...
Gyftakis, Konstantinos N. +2 more
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Comparison of Finite-Element-Based State-Space Models for PM Synchronous Machines [PDF]
, 2014 An interior-permanent-magnet motor is modeled by a combined analytical-numerical approach, in which the relationships between the stator currents and flux linkages are identified with static finite-element (FE) analysis.
Arkkio, Antero +4 more
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Energies, 2019 The insulation degradation of a voltage transformer winding is not easy to find, but it may ultimately cause the transformer to explode, leading to accidents such as phase-to-phase short circuits.
Hongwen Liu +4 more
doaj +1 more source
Generalized Voltage-based State-Space Modelling of Modular Multilevel Converters with Constant Equilibrium in Steady-State [PDF]
, 2017 This paper demonstrates that the sum and difference of the upper and lower arm voltages are suitable variables for deriving a generalized state-space model of an MMC which settles at a constant equilibrium in steady-state operation, while including the ...
Bergna-Diaz, Gilbert +4 more
core +3 more sources
IET Generation, Transmission & Distribution, 2021 Neutral non‐effectively grounded mode is widely used in medium‐voltage distribution networks in China. When a single‐phase grounding fault occurs in distribution networks, abundant transient signals will be generated.
Wenhao Wu +4 more
doaj +1 more source
Analysis and design of a modular multilevel converter with trapezoidal modulation for medium and high voltage DC-DC transformers [PDF]
, 2015 Conventional dual active bridge topologies provide galvanic isolation and soft-switching over a reasonable operating range without dedicated resonant circuits.
Adam, Grain P. +4 more
core +2 more sources
Power Flow Control and Current Ripple Minimization of HVDC Converter System by Using Zero-Sequence Voltage Injection Control [PDF]
, 2016 This paper introduces the Zero_Sequence Voltage_Injection(ZSVI) based Model Predictive_Control (MPC) to minimize the ripples in dc current & voltage and concurrently regulate the power_flow & dc_current. This paper takes the benefits to calculate
B, R. I. (Rekha), R, P. S. (Prof)
core