Results 41 to 50 of about 141,707 (269)

A Highly Efficient Single-Phase Three-Level Neutral Point Clamped (NPC) Converter Based on Predictive Control with Reduced Number of Commutations

open access: yesEnergies, 2018
This paper proposes a highly efficient single-phase three-level neutral point clamped (NPC) converter operated by a model predictive control (MPC) method with reduced commutations of switches. The proposed method only allows switching states with none or
Eun-Su Jun, Sangshin Kwak
doaj   +1 more source

Proposed Commutation Method for Performance Improvement of Brushless DC Motor

open access: yesEnergies, 2021
This study focused on the efficiency improvement and acoustic noise reduction of brushless DC (BLDC) motors by reducing current harmonics using a novel BLDC commutation method. To achieve these goals, we designed an improved 150° commutation method for a
Chang-Sung Jin   +3 more
doaj   +1 more source

Note on uncertainty relations in doubly special relativity and rainbow gravity

open access: yes, 2015
We present commutation relations depending on the rainbow functions which are slightly different from the well-known results. However, the advantage of these new commutation relations are compatible with the calculation of the Hawking temperature in the ...
Kim, Wontae, Son, Edwin J.
core   +1 more source

Medial commutativity

open access: yesAnnals of Pure and Applied Logic, 2007
27 pages, minor ...
Došen, Kosta, Petrić, Zoran
openaire   +2 more sources

Raising Power Loss Equalizing Degree of Coil Array by Convex Quadratic Optimization Commutation for Magnetic Levitation Planar Motors

open access: yesApplied Sciences, 2018
This paper proposes a convex quadratic optimization commutation method to raise the equalization degree of power loss distribution of coil array for magnetic levitation planar motors.
Shengguo Zhang   +2 more
doaj   +1 more source

Suppression strategy for subsequent commutation failure of DC system based on improved VDCOL

open access: yes电力工程技术, 2022
Aiming at the problem of subsequent commutation failure during the fault recovery period after the first commutation failure of high voltage direct current system,the recovery process is divided into the first commutation failure (stage 1),the beginning ...
CHEN Ruikang   +3 more
doaj   +1 more source

A class of GUP solutions in deformed quantum mechanics [PDF]

open access: yes, 2010
Various candidates of quantum gravity such as string theory, loop quantum gravity and black hole physics all predict the existence of a minimum observable length which modifies the Heisenberg uncertainty principle to so-called Generalized Uncertainty ...
Pedram, Pouria
core   +1 more source

Suppression measures of commutation failure in MIDC transmission systems

open access: yesThe Journal of Engineering, 2019
With the increasing of direct current (DC) transmission capacity, high-voltage DC (HVDC) location has become more and more intensive, and commutation failure has become increasingly prominent in multi-infeed DC (MIDC) transmission systems.
Wang Qing, Liu Kaipei, Wang Ling
doaj   +1 more source

Observables of Angular Momentum as Observables on the Fedosov Quantized Sphere

open access: yes, 2005
In this paper we construct the commutators of the Fedosov * (a generalization of the Moyal star product) on the phase space of S2. It is shown that this product obeys the standard angular momentum commutation relations in ordinary nonrelativistic quantum
Sparling, George, Tillman, Philip
core   +1 more source

How to construct a coordinate representation of a Hamiltonian operator on a torus [PDF]

open access: yes, 1995
The dynamical system of a point particle constrained on a torus is quantized \`a la Dirac with two kinds of coordinate systems respectively; the Cartesian and toric coordinate systems.
Ishikawa, S.   +3 more
core   +2 more sources

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