Design of frequency-domain controlled source for electromagnetic prospecting based on multi-frequency resonance

Zhu, Wang; Liu, Yan; Zhu, Xun

doi:10.1109/itnec.2017.8285109

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Let C 1 = C 2 = C s = 0.2 μF predefine three center frequencies, f 01 = 136, f 02 = 81 and f 0s = 33 kHz, and work out the initial inductances. The equation system (15) is solved for the three unknown inductances by the nonlinear trust-region algorithm and gives the solutions of 9.68, 31.51 and 50.39 μH, which are then substituted into the characteristic polynomial (11) to find the characteristic frequencies that are nearly the same as those predefined. It indicates that the inductors are exactly assigned.…”

Section: Design Of Passive Element Parametersmentioning

confidence: 99%

“…It is obvious that only one current component at the resonance frequency can be obtained from the resonant network if the modulation signal is only defined at one of the resonance frequencies. We proposed a multifrequency SPWM control method to output the three‐frequency current . However, the current magnitudes are uncontrollable, and the energy distribution is uneven at different resonant points.…”

Section: Driving Control Of Full‐bridge Invertermentioning

confidence: 99%

“…To improve the efficiency and resolution during FDEM sounding or WPT, a multifrequency resonant network is provided with high‐order resonance frequencies, which is constructed by two or more dynamical elements and organized in a nested way . In this work, we proposed a complete method including analysis of resonance frequencies, configuration the element parameters for so many dynamical elements, and realization of a hybrid‐frequency signal source based on a three‐frequency resonance network.…”

Section: Introductionmentioning

confidence: 99%

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Design of hybrid‐frequency current source based on multiresonance network

Zhu

Luo

Zhu

2019

IEEJ Transactions Elec Engng

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In order to overcome the low efficiency and poor resolution of single‐frequency transmitters for electromagnetic sounding and wireless power transfer (WPT), a well‐organized multifrequency resonant network is proposed to generate a synthetized current with two or more frequencies. The complete design and realization of the hybrid‐frequency current source is presented. The characteristic equation method is applied to extract the resonance frequencies from the given network. On the other hand, the nonlinear equation system about the passive elements is built and solved by the trust–region algorithm based on the expected frequencies. The multifrequency sinusoidal pulse width modulation method is first proposed to create the barcode driving signals for a full‐bridge inverter. The asynchronous modulation is recommended to reduce the harmonic components beyond the resonance frequencies, and the modulation ratios for the driving signals are adjusted at any resonance frequency so that the energy can be distributed evenly at different resonance points. The simulation results prove that almost all energy is concentrated at the resonance frequencies, and the frequency leakage is hardly seen. The resonant network and its control method is very useful to create a hybrid‐frequency current source for high‐efficiency and high‐resolution electromagnetic sounding and WPT. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Design Of Passive Element Parametersmentioning

confidence: 99%

Section: Driving Control Of Full‐bridge Invertermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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