Results 61 to 70 of about 17,191 (210)
Small, EarlyView.A gradient Ti‐doped WO3 electrochromic film is developed via dynamic co‐sputtering, enabling depth‐dependent band engineering and strain regulation. The gradient structure induces a built‐in electric field across the film thickness that enhances coupled ion–electron transport while improving mechanical robustness.
Fang Luo +4 more
wiley +1 more source
Nantong Daxue xuebao. Ziran kexue banFractional-slot winding permanent magnet motors(PM) are widely applied due to their unique advantages,with the most notable being their high-quality sinusoidal no-load back electromotive force(EMF) waveform.
ZHENG Junqiang; XU Haoen; ZHANG Yuting; MAO Jingfeng
doaj +1 more source
A Method to Improve Torque Density in a Flux-Switching Permanent Magnet Machine
Energies, 2020 With the continuous development of machines, various structures emerge endlessly. In this paper, a novel 6-stator-coils/17-rotor-teeth (6/17) E-shaped stator tooth flux switching permanent magnet (FSPM) machine is introduced, which has magnets added in ...
Junshuai Cao +5 more
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Energies, 2021 Static eccentricity (SE) is frequently generated by manufacturing processes. As the nonuniformity of the air-gap length is caused by the SE, the torque ripple and cogging torque increase in the motor.
Jin-Cheol Park +5 more
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Advances in mean-field dynamo theories
, 2012 We give a short introduction to the subject and review advances in understanding the basic ingredients of the mean-field dynamo theory. The discussion includes the recent analytic and numerical work in developments for the mean electromotive force of the
Pipin, V. V.
core +1 more source
Sensitivity of a 5-phase brushless DC machine to the 7th harmonic of the back-electromotive force
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551), 2004 This paper presents a vector control of a 5-phase drive composed of a 5-leg pulse width modulation (PWM) voltage source inverter (VSI) supplying a permanent-magnet brushless DC (BLDC) machine with trapezoidal waveform of the back-electromotive force (EMF).
Semail, Eric +2 more
openaire +5 more sources
Small, EarlyView.ABSTRACT The rapid expansion of the Internet of Things (IoT) and wearable electronics necessitates sustainable power sources to replace the limited electrochemical battery. While mechanical energy harvesting offers a promising solution, traditional harvesters face challenges of irregular and low−frequency environmental sources. This review presents the
Yongbin Han +2 more
wiley +1 more source
Harmonic Analysis on Torque Ripple of Brushless DC Motor Based on Advanced Commutation Control
Journal of Control Science and Engineering, 2018 This paper investigates the relationship between current, back electromotive force (back-EMF), and torque for permanent-magnet brushless DC (PM BLDC) motors under advanced commutation control from the perspective of harmonics.
Yanpeng Ji, Bin Li, Jingcheng Sun
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IET Generation, Transmission & Distribution, 2022 Abstract The synchronous reference frame phase‐locked loop (SRF‐PLL) is widely utilized for grid synchronization in voltage‐source converter (VSC) system. However, it fails to eliminate the effect of high grid impedance leading to instability in weak grids.
Ziyue Duan +5 more
openaire +1 more source
AI‐enabled bumpless transfer control strategy for legged robot with hybrid energy storage system
CAAI Transactions on Intelligence Technology, EarlyView.Abstract Designing Hybrid energy storage system (HESS) for a legged robot is significant to improve the motion performance and energy efficiency of the robot. However, switching between the driving mode and regenerative braking mode in the HESS may generate a torque bump, which has brought significant challenges to the stability of the robot locomotion.
Zhiwu Huang +6 more
wiley +1 more source