Results 1 to 10 of about 178,348 (364)
Proposed Commutation Method for Performance Improvement of Brushless DC Motor [PDF]
Energies, 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
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Commutation Failure Prediction Method Considering Commutation Voltage Distortion and DC Current Variation [PDF]
IEEE Access, 2019 Commutation failure (CF) at the inverter side is one of the most common failures in the line-commutated converter-based high voltage direct current (LCC-HVDC) system. Effective prediction of CF helps to formulate and implement protection measures timely.
Qi Wang +3 more
openalex +2 more sources
Sensors, 2021 Due to the COVID-19 virus being highly transmittable, frequently cleaning and disinfecting facilities is common guidance in public places. However, the more often the environment is cleaned, the higher the risk of cleaning staff getting infected ...
Shih-Ping Huang +9 more
doaj +1 more source
IEEE transactions on industrial electronics (1982. Print), 2023 This article proposes pulse width modulation (PWM) methods for low inductance brushless dc (BLDC) motor drives that minimize the commutation torque ripples. An uneven current of noncommutation phase generates the commutation torque ripples.
Juwon Lee, Gyu Cheol Lim, Jung-Ik Ha
semanticscholar +1 more source
Sensors, 2022 Determining the direction-of-arrival (DOA) of any signal of interest has long been of great interest to the wireless localization research community for military and civilian applications.
Chien-Bang Chen +6 more
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Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System
Sensors, 2023 The Internet of Things (IoT) for smart industry requires the surveillance and management of people and objects. The ultra-wideband positioning system is an attractive solution for achieving centimeter-level accuracy in target location. While many studies
Shih-Ping Huang +7 more
doaj +1 more source
Mathematics, 2021 The model of a fully available group of servers with a Poisson flow of primary calls and the possibility of losses before and after occupying a free server is considered.
Sergey Stepanov, Mikhail Stepanov
doaj +1 more source
IET Generation, Transmission & Distribution, 2022 Concerning the insufficient accuracy of the criterion for identifying commutation failure in HVDC transmission systems, a new detection method for commutation failure based on the variation rate of commutation inductance energy is proposed.
Jing Ma, Chen Liu, Peng Cheng
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An Evaluation Method for Commutation Failure Caused by Waveform Distortion [PDF]
E3S Web of Conferences, 2021 Commutation failure is a key issue that affects the safe operation of HVDC transmission systems. Scholars at home and abroad have conducted research on the mechanism, evaluation indicators, and control strategies of commutation failure.
Zhou Hao, Su Can, Zhou Hao
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Coordinated suppression commutation torque ripple for brushless DC motor with commutation time
IET Electric Power Applications, 2023 A commutation torque ripple suppression strategy for the brushless DC motor (BLDCM) with commutation time is proposed. First, a torque model considering back electromotive force (back‐EMF) variation is presented, and the cause of commutation torque ...
Zhongxin Wan +3 more
doaj +1 more source