A Comparati`ve Study of Resonant Frequency Calculation Based on Leakage-Inductance and Self-Inductance for CET System

2021 ◽  
Author(s):  
Zakarya A. Atraqchi ◽  
Yasir M.Y. Ameen ◽  
Ahmad T. Younis
Keyword(s):  
Resonant Frequency ◽  
Leakage Inductance ◽  
Frequency Calculation

scholarly journals Design Optimization of MEMS Based LLC Tunable Resonant Converter for Power Supplies on Chip

2013 ◽  
Vol 705 ◽  
pp. 258-263
Author(s):  
Fahimullah Khan ◽  
Yong Zhu ◽  
Jun Wei Lu ◽  
Dzung Dao
Keyword(s):  
Resonant Frequency ◽  
Resonance Frequency ◽  
Parallel Plate ◽  
Power Supplies ◽  
Resonant Converter ◽  
Load Variations ◽  
Leakage Inductance ◽  
Variable Capacitor ◽  
Numerical Software ◽  
On Chip

In this paper, a novel MEMS based LLC converter is proposed for on chip power supplies. The design is optimized based on commercially available Metal MUMPs process for fabrication. The resonant frequency is optimized at 20MHz and MEMS based variable capacitor is fabricated on the chip to tune the peak resonance frequency of circuit which varies due to the load variations. The Design is simulated in FEM based numerical software COMSOL and Intellisuite. According to analysis the magnetizing inductance of 42nH and leakage inductance of 40nH has been achieved from 16 mm2 rectangular coil transformer. The total capacitance of 1500pF has been achieved from parallel plate capacitors and variation of 3pF has been achieved from variable capacitor.

Noise Control of a Chamber Core Cylinder Using Cylindrical Helmholtz Resonators

2003 ◽  
Author(s):  
Deyu Li ◽  
Jeffrey S. Vipperman
Keyword(s):  
Resonant Frequency ◽  
Noise Level ◽  
Noise Control ◽  
Low Frequencies ◽  
Optimal Position ◽  
Cylindrical Structure ◽  
Helmholtz Resonators ◽  
Resonator Design ◽  
Frequency Calculation ◽  
Cavity Resonances

Previous investigations have determined that the noise transmission into a finite cylindrical structure at low frequencies is dominated by the cavity resonances. Therefore, noise control at the first several cavity resonances for a Chamber Core cylinder can significantly reduce the noise level at low frequencies inside the cylinder. This work explores the feasibility of noise control for the Chamber Core cylinder using cylindrical Helmholtz resonators. The targeted frequencies are the first four cavity resonances. Detailed considerations of the resonant frequency calculation, resonator design, and experimental verification are presented. The effects on the noise reduction spectrum of two closely spaced resonators are experimentally studied. The optimal position of the resonators is also discussed. The noise control results indicate that the Helmholtz resonators can significantly attenuate the noise level at the targeted frequency bands.

Resonant frequency calculation of meander dipole antennas by TLM

2008 ◽  
Vol 50 (6) ◽  
pp. 1707-1712 ◽  
Author(s):  
David Puente ◽  
Daniel Valderas ◽  
Joseba García ◽  
Juan Meléndez ◽  
Javier Gómez ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
Dipole Antennas ◽  
Frequency Calculation

scholarly journals Resonant Frequency Calculation and Optimal Design of Peano Fractal Antenna for Partial Discharge Detection

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jian Li ◽  
Changkui Cheng ◽  
Lianwei Bao ◽  
Tianyan Jiang
Keyword(s):  
Pattern Recognition ◽  
Optimal Design ◽  
Resonant Frequency ◽  
High Frequency ◽  
Approximate Formula ◽  
Online Monitoring ◽  
Partial Discharge ◽  
Fractal Antenna ◽  
Insulation Defect ◽  
Frequency Calculation

Ultra-high-frequency (UHF) approaches have caught increasing attention recently and have been considered as a promising technology for online monitoring partial discharge (PD) signals. This paper presents a Peano fractal antenna for UHF PD online monitoring of transformer with small size and multiband. The approximate formula for calculating the first resonant frequency of the Peano fractal antenna is presented. The results show that the first resonant frequency of the Peano fractal antenna is smaller than the Hilbert fractal antenna when the outer dimensions are equivalent approximately. The optimal geometric parameters of the antenna were obtained through simulation. Actual PD experiments had been carried out for two typically artificial insulation defect models, while the proposed antenna and the existing Hilbert antenna were both used for the PD measurement. The experimental results show that Peano fractal antenna is qualified for PD online UHF monitoring and a little more suitable than the Hilbert fractal antenna for pattern recognition by analyzing the waveforms of detected UHF PD signals.

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