Results 241 to 250 of about 288,836 (289)

REDUCIBLE FRACTIONAL HARMONICS GENERATED BY THE NONAUTONOMOUS DUFFING–RAYLEIGH EQUATION: POCKETS OF REDUCIBLE HARMONICS AND ARNOLD'S TONGUES

International Journal of Bifurcation and Chaos, 2000
This paper deals with bifurcation structures related to families of fractional harmonics (or ultra-subharmonics) solutions generated by the Duffing–Rayleigh equation with a nonsymmetrical periodic external force. It presents some results on fractional reducible harmonics and their bifurcations.
M. Touzani Qriouet, C. Mira
openaire   +2 more sources

Reducing Supply Current Harmonics

IEEE Industry Applications Magazine, 1998
In this article, a simple and effective method for reducing the supply current harmonics has been proposed for a parallel connected 12-pulse thyristor converter with an interphase reactor. The proposed method requires only an interphase reactor with an optimal inductance value being much smaller than conventional inductance values, without any ...
Toshihiko Tanaka, Naotsugu Koshio, Hirofumi Akagi, Akira Nabae   +3 more
openaire   +1 more source

Study on the Structure of the Flexspline of Harmonic Reducer

Applied Mechanics and Materials, 2013
According to the flexible gears damage problem during the work process of the harmonic reducer, a FEM model of the flexible and wave generator was established. On the basis of the mechanics of materials and the finite element theory, a large number of numerical simulations by the use of the finite element software were made.
Xin Wang, Xuan Zhou, Cheng Qun Li
openaire   +1 more source

Harmonic Droop Controller to Reduce the Voltage Harmonics of Inverters

IEEE Transactions on Industrial Electronics, 2013
In this paper, the load and/or grid connected to an inverter is modeled as the combination of voltage sources and current sources at harmonic frequencies. As a result, the system can be analyzed at each individual frequency, which avoids the difficulty in defining the reactive power for a system with different frequencies because it is now defined at ...
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Globally Injective Flattening via a Reduced Harmonic Subspace

ACM Transactions on Graphics, 2022
We present a highly efficient-and-robust method for free-boundary flattening of disk-like triangle meshes in a globally injective manner. We show that by restricting the solution to a low-dimensional subspace of harmonic maps, we can dramatically accelerate the process while obtaining a low-distortion result. The algorithm consists of two main steps. A
Guy Fargion, Ofir Weber
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Accelerated Life Test of Intelligent Harmonic Reducer for Robot

2024 10th International Conference on Mechatronics and Robotics Engineering (ICMRE)
Shuo Zhang, Bin He 0006, Fuze Xu, Rui Yu
exaly   +3 more sources

A method of reducing harmonic contents for SPWM

Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475), 1999
Fully digital AC drives are becoming an industrial standard. While the traditional PWM AC motor drivers use sinusoidal reference waveforms with different optimum modulation strategies, at the present time for high performances drives, the space vector pulse modulation is used.
Y.X. Gao, D. Sutanto
openaire   +1 more source

Optimal modulation to reduce harmonics in inverters

2015 International Conference on Advanced Technologies for Communications (ATC), 2015
Nowadays, there is a rapid development of devices of uninterruptible power supply (UPS) in communications. Inverter is one of the important parts in the UPS and its producing of current harmonics negatively affects the operation quality of communication devices. Therefore, reduction of current harmonics in the UPSs to achieve the stringent standards is
Quang Tho Tran, Truong Viet Anh, Le Minh Phuong   +2 more
openaire   +1 more source

Stepped-Waveform Synthesis for Reducing Third Harmonic Content

IEEE Transactions on Instrumentation and Measurement, 2005
Third harmonic measurements are used to assess the nonlinearity level of resistors, as recommended by the IEC/TR 60440 standard. Availability of a signal generator with extremely small (zero in limiting case) content of the third harmonic plays a key role in getting successful linearity measurements.
Edval J. P. Santos, Anatoly A. Barybin
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Completely reducible factors of harmonic polynomials of three variables

Matematicheskie trudy, 2021
Summary: We describe the divisors of complex valued homogeneous harmonic polynomials on \(\mathbb{R}^3\) which are products of linear forms and characterize the homogeneous polynomials \(p\) that admit a couple of linear forms \(\ell_1\) and \(\ell_2\) such that \(\ell_1^mp\) and \(\ell_2^mp\) are harmonic for some \(m\in\mathbb{N}\).
openaire   +1 more source