Research on Precise Damping Matching for Transient Electromagnetic Transmitter

Bao, Ming; Zhang, Minming; Li, Junqiang; Mei, Zhou; Liao, Xian; Fu, Zhihong

doi:10.12783/dtcse/pcmm2018/23667

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…16 demonstrates that the turn-off time of the pulse current is 46.2 µs before optimization and 35.2 µs after optimization, signifying a reduction of 23.8%. Moreover, the nonlinear error of the falling edge current, calculated using equation (19), is 10.5% before optimization and 5.0% after optimization. With the pole configuration method, the turn-off time is 48.5us, and the non-linear error is 8.2%.…”

Section: Resultsmentioning

confidence: 99%

“…Accroding to the parameters in Table Ⅰ, we can calculate R=288.7Ω using the equation (12). The falling edge current waveform during the t2-t4 interval can be computed using equations ( 15) and ( 18), while the nonlinear error is determined by equation (19). Using this data, we obtain the relationship between Iopt and the nonlinear error, as illustrated in Fig.…”

Section: Csolution Of the Topt And Ioptmentioning

confidence: 99%

“…Therefore, it is crucial to determine the optimal value of the damping resistance for T analyzing the TC. Typically, this calculation is performed based on a second-order circuit model comprised of the transmitting coil's inductance and parasitic capacitance under critical damping conditions [16][17][18][19]. However, this method disregards the impact of the switching device's parasitic capacitance on the critical damping resistance value.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Parasitic Capacitance on Turn-Off Current and Its Optimization Method for Transient Electromagnetic System

Liao,

Xu,

Liu

et al. 2024

IEEE Trans. Instrum. Meas.

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In transient electromagnetic (TEM) inverter circuits, a damping resistor is typically connected in parallel to the transmitting coil to prevent overshoot during the turn-off period of the pulse current. This configuration results in an exponential decay waveform for the pulse current, which prolongs the turn-off time and increases the nonlinear error. This paper analyzes the impact of the parasitic capacitance on the value of the damping resistor and the end-period waveform of the pulse current base on the inverter circuits, and proposes an optimized control method to reduce both the turn-off time and the nonlinear error of the pulse current. The method is validated through the construction of an experimental circuit. According to the experimental data, this optimization method reduces the turn-off time by 23.8% and the nonlinear error by 5.5%. In the unexploded ordnance (UXO) detection experiment, the optimization method's detection results exhibit higher resolution.

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Section: Resultsmentioning

confidence: 99%

Section: Csolution Of the Topt And Ioptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Parasitic Capacitance on Turn-Off Current and Its Optimization Method for Transient Electromagnetic System

Liao,

Xu,

Liu

et al. 2024

IEEE Trans. Instrum. Meas.

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Current oscillation elimination for the helicopter transient electromagnetic inverter based on pole configuration

Zhang

Wang

et al. 2023

Review of Scientific Instruments

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In a helicopter transient electromagnetic system, the quality of the transmitting-current waveform will affect the geological exploration effect. In this paper, a helicopter TEM inverter, based on a single-clamp source and pulse width modulation technology, is designed and analyzed. Besides, it finds that there will be current oscillation in the early measuring stage. For this problem, first, the factors that cause the current oscillation are analyzed. Then, it is proposed to apply the RC snubber to eliminate this current oscillation. Since the imaginary part of the pole is the essence of oscillation, configuring the pole can eliminate the current oscillation. By establishing the early measuring stage system model, the characteristic equation of the load current with the snubber circuit is deduced. Next, the characteristic equation is solved by the exhaustive method and the root locus method to obtain the parametric region that eliminates the oscillation. Finally, through simulation and experimental verification, the proposed snubber circuit design method can be used to eliminate the early measuring stage current oscillation. Compared to the method of switching into the damping circuit, it can achieve the same performance, more important is that there is no switching action and it is easy to achieve.

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A Bipolar Current-Pulsed Power Supply With Dual-Pulse Energy Boosting for Shallow Electromagnetic Detection

Liu

Liao

et al. 2022

IEEE Trans. Power Electron.

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Research on Precise Damping Matching for Transient Electromagnetic Transmitter

Cited by 4 publications

References 9 publications

Influence of Parasitic Capacitance on Turn-Off Current and Its Optimization Method for Transient Electromagnetic System

Influence of Parasitic Capacitance on Turn-Off Current and Its Optimization Method for Transient Electromagnetic System

Current oscillation elimination for the helicopter transient electromagnetic inverter based on pole configuration

A Bipolar Current-Pulsed Power Supply With Dual-Pulse Energy Boosting for Shallow Electromagnetic Detection

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