Results 21 to 30 of about 4,909 (199)

Penguat Audio Kelas D dengan Umpan Balik Tipe Butterworth

Jurnal Nasional Teknik Elektro, 2016
A class D amplifier would, in ideal sense, amplify signals without any noises and distortions which yield 100% efficiency and 0% Total Harmonic Distortion (THD). However, class D amplifiers have some drawbacks that lead to nonlinearity and increasing THD.
Gunawan Dewantoro, Franciscus Dalu Setiaji, Tio Pragustha   +2 more
doaj   +3 more sources

Intermittent neurologic decompensation: An underrecognized presentation of tyrosine hydroxylase deficiency

JIMD Reports, 2022
Tyrosine hydroxylase deficiency (THD) is a treatable inborn error of dopamine biosynthesis caused by mutations in TH. Two presentations are described. Type A, milder, presents after 12 months of age with progressive hypokinesis and rigidity.
Marjolaine Champagne, Gabriella A. Horvath, Sébastien Perreault, Julie Gauthier, Keith Hyland, Jean‐François Soucy, Grant A. Mitchell   +6 more
doaj   +1 more source

Low THD bandpass-based oscillator using multilevel hard limiter

IET Circuits, Devices & Systems, 2007
In order to reduce the total harmonic distortion (THD) of a bandpass-based oscillator, instead of using a conventional hard limiter, a multilevel hard limiter (MHL) is proposed which inherently removes the third and the fifth-order harmonics from the frequency spectrum of its output signal.
Faramarz Bahmani, Edgar Sánchez-Sinencio   +1 more
openaire   +1 more source

Three‐phase ripple free DCM boost converter with low THD [PDF]

IET Power Electronics, 2019
High total harmonic distortion (THD) and ripple of input current are the two main disadvantages of a single switch discontinuous current mode boost power factor correction (PFC) converter. In this study, THD and input current ripple of conventional DCM boost converter are improved.
Reza Foroozeshfar, Ehsan Adib
openaire   +1 more source

Theoretical total harmonic distortion evaluation based on digital to analogue converter mismatch to improve the linearity of successive approximation register analogue to digital converter

IET Circuits, Devices and Systems, 2022
Mismatch in the binary‐weighted capacitive digital‐to‐analog converter (DAC) greatly affects the linearity of the successive‐approximation‐register (SAR) ADC by deteriorating the total harmonic distortion (THD).
Li Dong, Yan Song, Bing Zhang, Zhechong Lan, Youze Xin, Liheng Liu, Ken Li, Xiaofei Wang, Li Geng   +8 more
doaj   +1 more source

Selective harmonic mitigation based two-scale frequency control of cascaded modified packed U-Cell inverters

Energy Reports, 2022
A new Modified Packed U-Cell (MPUC) converter architecture with cascading is proposed in this paper. To provide an output voltage of 25 levels, the proposed cascaded MPUC needs only twelve power switches and four power sources.
Hasan Iqbal, Mohd Tariq, Mohammad Sarfraz, Arif I. Sarwat, Waleed Alhosaini, Obaid Aldosari, Asma Aziz   +6 more
doaj   +1 more source

A Novel Sliding Hysteresis Band Based Direct Torque Control Scheme for PMSM Motors to Achieve Improved Current THD With Reduction in Torque and Flux Ripples Eliminating the Low-Speed Problems

IEEE Access
The performance of Direct Torque Controlled (DTC) Permanent Magnet Synchronous Motor (PMSM) is severely hampered by high Total Harmonic Distortion (THD) in motor current, especially under low-speed operations.
Anjaly Mohan, Meera Khalid, A. C. Binojkumar   +2 more
doaj   +1 more source

Selective Harmonics Elimination Technique in Cascaded H-Bridge Multi-Level Inverters Using the Salp Swarm Optimization Algorithm [PDF]

Journal of Operation and Automation in Power Engineering, 2020
A new optimization method is proposed in this paper for finding the firing angles in multi-level voltage source inverters to eliminate low-order selective harmonics and reduce total harmonic distortion (THD) value of the output voltage.
M Hosseinpour, S. Mansoori, H. Shayeghi
doaj   +1 more source

Halide Perovskite: A Rich Source of Thermal Insulator

Advanced Science, EarlyView.
Halide perovskites exhibit ultralow thermal conductivity driven by intrinsic lattice softness and strong anharmonicity, falling below conventional defect‐engineering limits. Weak metavalent bonding, A‐site rattling, and dynamic octahedral tilting drive phonon scattering to the Ioffe–Regel limit, where wave‐like tunneling replaces particle‐like ...
Haolin Ye, Bangzhi Ge, Yuan Yu, Chongjian Zhou   +3 more
wiley   +1 more source

Development of a high performance batteries charger with low THD, high power factor, and high efficiency

Dyna, 2018
This paper presents the design, simulation, and implementation of an off-board charger of medium and low capacity batteries that incorporates a power factor corrector, reaches a low THD current with the advantage of providing higher robustness against ...
Johan Sebastian Sanchez-Choachi, Miguel Ángel Dávila, Cesar Leonardo Trujillo   +2 more
doaj   +1 more source