Results 31 to 40 of about 816,421 (295)

An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression

Zhejiang dianli
Existing capacitor voltage ripple suppression methods primarily rely on second-harmonic circulating current injection （SHCCI）. However， these methods often increase valve losses in modular multilevel converters （MMCs） ， degrading operational efficiency ...
FANG Dongping, QIU Yang, CUI Jindong, FEI Lisong, TANG Fangjie, ZHAO Jiancheng   +5 more
doaj   +1 more source

A simple overlap angle control strategy for reducing commutation torque ripple in a brushless DC motor drive

Engineering Science and Technology, an International Journal, 2017
A commutation torque ripple is generated in a brushless DC motor due to a finite time taken for current transfer between outgoing phase and incoming phase due to the phase inductance.
Chetan K. Lad, R Chudamani
doaj   +1 more source

A compensation method of ripple voltage on DC tacho-generator.

IEEJ Transactions on Industry Applications, 1990
AbstractA dc tachogenerator has been used widely in such applications as computer peripherals and machine tools. However, this generator has some problems, e.g., the ripple voltage involved in the output voltage and the abrasion of the brush and the commutator.
Sekine, Hideomi, Ishikawa, Takeo, Sato, Shinichi, Suto, Tugumasa   +3 more
openaire   +2 more sources

Output voltage ripple changes with the change in output capacitance.

, 2018
Output voltage ripple changes with the change in output capacitance.
N. A. Rahim (6033758), Jeyraj A / L Selvaraj (6033755), M. Zakir Hossain (6033752)   +2 more
core   +1 more source

Capacitors Voltage Switching Ripple in Three-Phase Three-Level Neutral Point Clamped Inverters with Self-Balancing Carrier-Based Modulation

Energies, 2018
This paper provides a comprehensive analysis of the capacitors voltage switching ripple for three-phase three-level neutral point clamped (NPC) inverter topologies.
Manel Hammami, Gabriele Rizzoli, Riccardo Mandrioli, Gabriele Grandi   +3 more
doaj   +1 more source

A Low Torque Ripple Direct Torque Control Method for Interior Permanent Magnet Motor

Applied Sciences, 2020
This paper proposes a simple method to generate stable voltage commands for permanent magnet synchronous motors to achieve low torque ripple based on space vector modulation direct torque control (SVM-DTC).
Min-Fu Hsieh, Yun-Chung Weng
doaj   +1 more source

Analysis of output voltage ripple for dual randomized PWM buck converter operating in continuous and discontinuous conduction modes

Acta Polytechnica, 2022
Dual Randomized Pulse Width Modulation (DRPWM) is renowned for its better effectiveness than Simple Randomized Pulse Width Modulation (SRPWM) in reducing conducted Electro-Magnetic Interferences (EMI) in power converters. However, the introduction of low-
Aimad Boudouda, Nasserdine Boudjerda, Fares Nafa   +2 more
doaj   +1 more source

Tradeoffs between AC power quality and DC bus ripple for 3-phase 3-wire inverter-connected devices within microgrids [PDF]

, 2011
Visions of future power systems contain high penetrations of inverters which are used to convert power from dc (direct current) to ac (alternating current) or vice versa.
Finney, Stephen J., Burt, Graeme M., Roscoe, Andrew J.   +2 more
core   +3 more sources

Exercise Capacity, Physical Activity, Fatigue, and Neurocognitive Function in Adult Survivors of Childhood Acute Lymphoblastic Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adult survivors of childhood acute lymphoblastic leukemia (ALL) are at risk of reduced exercise capacity, decreased physical activity levels, persistent fatigue, and neurocognitive deficits. The aim was to investigate exercise capacity and physical activity levels of adult survivors of childhood ALL and their associations with ...
Laura Jess, Gustaf Glavå, Simon Skau, Hans‐Georg Kuhn, Maria Bäck, Marianne Jarfelt   +5 more
wiley   +1 more source

Capacitor voltage ripple suppression mechanism and control strategy for hexverter

Zhongguo dianli
At low-frequency operating conditions, the submodule capacitor voltage ripple in Hexverter increases significantly, leading to higher capacitance requirements and resulting in increased converter volume and cost. To alleviate the design constraints on DC
Jun SHU, Yang YI, Zhengfeng CHEN, Zhongpeng LU, Yiwei HUANG, Darui LIU, Yiming ZHANG   +6 more
doaj   +1 more source