Results 21 to 30 of about 2,035,459 (284)
Вестник Северо-Кавказского федерального университета, 2022 The article presents a technique for assessment the level of consumers’ impact on the voltage asymmetry by the zero sequence at the point of common connection. The results of a computational experiment that determine the possibility of using the level of
Dmitrii Kostyukov
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Control Strategies for Open-End Winding Drives Operating in the Flux-Weakening Region [PDF]
, 2013 This paper presents and compares control strategies for three-phase open-end winding drives operating in the flux-weakening region. A six-leg inverter with a single dc-link is associated with the machine in order to use a single energy source.
BRUYERE, Antoine +4 more
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On Sequences Without Short Zero-Sum Subsequences
The Electronic Journal of Combinatorics, 2023 Let $G$ be a finite abelian group. It is well known that every sequence $S$ over $G$ of length at least $|G|$ contains a zero-sum subsequence of length at most $\mathsf{h}(S)$, where $\mathsf{h}(S)$ is the maximal multiplicity of elements occurring in $S$.
Zeng, Xiangneng, Yuan, Pingzhi
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Energies, 2020 Through the analysis of the recovery inrush current generated by the external fault removal of the converter transformer, it is pointed out that the zero-sequence current caused by the recovery inrush may result in the saturation of the neutral current ...
Tao Zheng +4 more
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Primitive prime divisors in zero orbits of polynomials [PDF]
, 2011 Let $(b_n) = (b_1, b_2, ...)$ be a sequence of integers. A primitive prime divisor of a term $b_k$ is a prime which divides $b_k$ but does not divide any of the previous terms of the sequence. A zero orbit of a polynomial $f(z)$ is a sequence of integers
Doerksen, Kevin, Haensch, Anna
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Zeros of linear recurrence sequences [PDF]
manuscripta mathematica, 1999 Let \(f(x)= P_0(x) \alpha_0^x+\cdots+ P_k(x) \alpha_k^x\) be an exponential polynomial over a field \(\mathbb{K}\) of zero characteristic. For \(i=0,\dots, k\), \(0\neq P_i\in \mathbb{K}[x]\) and \(0\neq \alpha_i\in \mathbb{K}\) such that for each pair \((i,j)\) with \(i\neq j\), \(\alpha_i/ \alpha_j\) is not a root of unity.
Schlickewei, Hans Peter +2 more
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Design of a mine-used low-voltage leakage protection device
Gong-kuang zidonghua, 2020 In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device was ...
ZHENG Qingle +3 more
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Applied Sciences, 2020 In microgrids, paralleled converters can increase the system capacity and conversion efficiency but also generate zero-sequence circulating current, which will distort the AC-side current and increase power losses.
Zhao Han +3 more
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Zhejiang dianli, 2023 In order to use the existing hardware sources to improve the line selection performance of single-phase grounding fault of small resistance grounding systems， a method for line selection of single-phase grounding fault based on the global steady-state ...
LIU Jian +4 more
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Diagonality and idempotents with applications to problems in operator theory and frame theory [PDF]
, 2015 We prove that a nonzero idempotent is zero-diagonal if and only if it is not a Hilbert-Schmidt perturbation of a projection, along with other useful equivalences. Zero-diagonal operators are those whose diagonal entries are identically zero in some basis.
Loreaux, Jireh, Weiss, Gary
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