Control Method for Wireless Inductive Energy Transfer Systems With Relatively Large Air Gap

Pijl, Ferdi van der; Bauer, Pavol; Castilla, Miguel

doi:10.1109/tie.2011.2163917

Cited by 55 publications

(18 citation statements)

References 23 publications

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“…One should note that in the case of Fig. 3(f) the coil turn is increased to make up the weakened magnetic field according to (9) to meet the consideration (6). From Fig.…”

Section: B the Methods For Frequency Splitting Eliminationmentioning

confidence: 99%

“…Kurs et al was reported in Science in 2007 [1][2][3][4][5][6][7]. It is pointed out that magnetic resonant coils in the WPT/MRC system can wirelessly exchange electromagnetic (EM) power efficiently by magnetic coupling, and the transfer distance is much longer compared with conventional WPT via inductive coupling [8][9][10]. Therefore, such WPT/MRC can be widely applied in portable consumer electronic, medical, and industrial devices such as charging vehicles, endoscopes, laptops and so on [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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A Method of Using Nonidentical Resonant Coils for Frequency Splitting Elimination in Wireless Power Transfer

Lyu

Meng

Yang

et al. 2015

IEEE Trans. Power Electron.

108

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In this paper, an efficient method is proposed to eliminate frequency splitting in nonradiative wireless power transfer via magnetic resonance coupling (WPT/MRC). In this method, two nonidentical resonant coils (NIRCs) are used as wireless power transmitter and receiver, respectively. According to the elliptic integral term in the analytical expression, the pole of the mutual inductance function with respect to transfer distance can be eliminated by using the two NIRCs, and hence over-coupling between transmitter and receiver with close transfer distance is avoided. Therefore, frequency splitting caused by over-coupling can be suppressed and stable output power can be achieved. The NIRCs are analytically calculated, numerically simulated and finally, fabricated and tested to verify the theory. All the calculated and experimental results show that frequency splitting is completely eliminated and uniform voltage across the load is achieved. Furthermore, lateral misalignment between the NIRCs barely introduces frequency splitting, and the suppression level of frequency splitting can also be controlled freely.  Index Terms-Frequency splitting, magnetic resonance coupling, nonidentical resonant coils, wireless power transfer (WPT)

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“…One should note that in the case of Fig. 3(f) the coil turn is increased to make up the weakened magnetic field according to (9) to meet the consideration (6). From Fig.…”

Section: B the Methods For Frequency Splitting Eliminationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Method of Using Nonidentical Resonant Coils for Frequency Splitting Elimination in Wireless Power Transfer

Lyu

Meng

Yang

et al. 2015

IEEE Trans. Power Electron.

108

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“…Therefore, the point-of-load converters or dc plugs for a DC micro-grid require special attention since dc current does not have zero-cross points. Detaching the load from the ac-link is another option; in order to avoid undesired sparks, a detachable transformer is proposed by coupling two sets of the coil only through the air [30][31][32].…”

Section: Proposed Air-coupled DC Transformermentioning

confidence: 99%

Analysis and Design of an Air-Coupled DC Transformer with a Hybrid Modulation Control Method

Jiang

Hashimoto

2019

Energies

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DC micro-grid is gaining increasing attention recently due to its highly efficient energy utilization and flexible energy exchange capabilities. In this paper, an air-coupled DC–DC transformer is proposed for the interconnection between the active load and the DC microgrid. The generic problems in an air-coupled power transfer system without ferromagnetic structure are discussed. A bidirectional half-bridge topology is also proposed to suit the characteristics of the stationary load and to realize the bidirectional power transfer between the active DC load and the DC grid. A Hybrid Modulation Method (HMM) is proposed; the small signal model is derived and linear control techniques are applied to the forward power transfer control, and phase model control is applied to the reverse power transfer model. The open-loop system is simulated by PSIM to get the characteristics of the forward and reverse transfer model, and the closed system is built in the MATLAB/SIMULINK to verify the effect of the forward frequency control method and the reverse phase control method. The prototype is built with a dsPIC controller, tests are performed to evaluate the characteristics of the transformer and the power flow control of the bidirectional power transfer.

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“…Hysteretic Bang-Bang control and PID (Proportion Integration Differentiation) control are two typical control methods. Although these control methods are easy to implement [2,[11][12][13], they normally cannot fulfill multi-objective and robust performance requirements. As a result, more attention is being paid to advanced control methods.…”

Section: Introductionmentioning

confidence: 99%

High Robustness Control for Robotic Wireless Power Transfer Systems with Multiple Uncertain Parameters Using a Virtual Buck Converter

Duan

Zou

2017

Energies

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Aiming at achieving high robustness performance in Wireless Power Transfer (WPT) systems for moving robot power supply, this paper proposes a H ∞ robust control method with multiple parameters that vary randomly, including the mutual inductance, load parameter, and operating frequency. These uncertain parameters make the system control extremely difficult. A composite Upper Linear Fractional Transformation (LFT) method is proposed to deal with the system uncertainty, particularly for the mutual inductance detachment, which is very unique and important for WPT systems. A suboptimal H ∞ controller design method is proposed based on Generalized State Space Averaging (GSSA) model in order to simplify the system structure. In controller implementation, a virtual buck converter for phase shifted regulation is proposed to replace real input buck converter. The proposed H ∞ control method is easy to implement because only the output voltage of the WPT system needs to be sampled, and based on which a simple DSP control algorithm is developed. Simulation and experimental results have demonstrated that the proposed control method can achieve less than 15 ms response speed with 70% mutual inductance variation and 50% load variation tolerance respectively.

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Control Method for Wireless Inductive Energy Transfer Systems With Relatively Large Air Gap

Cited by 55 publications

References 23 publications

A Method of Using Nonidentical Resonant Coils for Frequency Splitting Elimination in Wireless Power Transfer

A Method of Using Nonidentical Resonant Coils for Frequency Splitting Elimination in Wireless Power Transfer

Analysis and Design of an Air-Coupled DC Transformer with a Hybrid Modulation Control Method

High Robustness Control for Robotic Wireless Power Transfer Systems with Multiple Uncertain Parameters Using a Virtual Buck Converter

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