Robust $H_\infty$  Output Feedback Control of a Rotary Capacitive Power Transfer System

Zang, Shaoge; Lu, Kai; Nguang, Sing Kiong; Sun, Wei

doi:10.1109/access.2019.2935209

Cited by 15 publications

(13 citation statements)

References 33 publications

(34 reference statements)

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“…However, limitation of the two-stage system is the increased volume and reduced efficiency. Class E topology used in [9] has the metric of single switch operation.…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…However, it is just suitable for low power and low voltage input application due to the high voltage stress. Furthermore, HF inverters in [6]- [9] require that the switching frequency should be kept above the resonant frequency to achieve ZVS, which makes the voltage gain dependent on the load resistance and ZVS operation lost at light load condition. The single-stage structure of this paper has advantages of high overall efficiency and simple circuit.…”

Section: Comparison and Discussionmentioning

confidence: 99%

“…Various topologies are available for the HF inverter in CPT systems [5]- [9], the phase-shift full-bridge configuration is usually regarded as the most suitable topology because it can control both the magnitude and frequency of the primary voltage [10], [11]. However, it requires four power switches and gate drivers, which makes the system complex and expensive.…”

Section: Introductionmentioning

confidence: 99%

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Single-Stage Duty-Controlled Half-Bridge Inverter for Compact Capacitive Power Transfer System

Truong

Choi

2021

IEEE Access

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Capacitive wireless power transfer (CPT) is becoming a promising alternative to inductive power transfer (IPT) due to low costs and the simplicity of capacitive coupler. This paper presents a new architecture that makes CPT systems even simpler and easier to control. In the proposed scheme, a wide input voltage range is achieved by duty control while the output voltage is inherently load-independent, and this eliminates the need for an extra DC-DC converter. Our system also provides an extended zerovoltage-switching (ZVS) range to deal with both input and load variations. We carried out ZVS analysis for each MOSFET switch and based on this an optimal design was proposed. We implemented a prototype 160 W CPT system based on our design procedure, and its performance was then verified under a universal input voltage with load variations from 200-1000 Ω. A DC-DC efficiency as high as 88.2 % was achieved, showing the value of the proposed topology.INDEX TERMS Asymmetric half-bridge, capacitive wireless power transfer, zero voltage switching.

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“…However, limitation of the two-stage system is the increased volume and reduced efficiency. Class E topology used in [9] has the metric of single switch operation.…”

Section: Comparison and Discussionmentioning

confidence: 99%

Section: Comparison and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Single-Stage Duty-Controlled Half-Bridge Inverter for Compact Capacitive Power Transfer System

Truong

Choi

2021

IEEE Access

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“…Different methods contributed with significant advances in robust control theory for the treatment of structured uncertainties varying inside convex hulls. In this regard, recently published results include H 2 and H ∞ synthesis [14], [15], [16]; model predictive control [17], [18], [19]; and gain-scheduled control [20], [21], [22].…”

Section: Introductionmentioning

confidence: 99%

Robust Recursive Regulator for Systems Subject to Polytopic Uncertainties

2021

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We present a robust recursive framework for the regulation of discrete-time linear systems subject to polytopic uncertainties. Based on regularized least-squares with a penalty parameter, we formulate a convex optimization problem and weight the polytope vertices altogether. In this sense, the main contribution of this paper consists of a robust recursive framework for the computation of stabilizing feedback gains. The solution does not require numerical optimization packages and relies ultimately on a single penalty parameter which is easily tuned. Moreover, the gains are obtained recursively through algebraic expressions, as opposed to related works which employ linear matrix inequalities. Under observability and controllability conditions, we demonstrate convergence and stability of the closed-loop system in terms of an algebraic Riccati equation. We provide numerical and real-world examples to validate the proposed approach and for comparison with a robust H ∞ controller.

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“…They barely suffer from eddy current losses in high-frequency magnetic fields when there is metallic material nearby [14]. Besides, the CPT systems are found to have a better misalignment performance [15,16]. Several research groups have already attempted to use CPT to achieve data transmission in some industrial applications [17,18].…”

Section: Introductionmentioning

confidence: 99%

Underground Communications Using Capacitive Data Transfer Devices

2020

Self Cite

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This paper explores the feasibility of applying the capacitive power transfer (CPT) technology in underground data transmission applications. Based on the electrical properties of soils, the paper extends the existing CPT air coupler model into a more generalized model. The autonomous push-pull inverter is selected to power the CPT system and modified to further the data transmission range. With a designed load shift keying (LSK) circuitry, this self-oscillating inverter regards the data as a sequence of impedance changes, resulting in operation frequency drifts. A Frequency Shift Keying (FSK) demodulator is applied to capture the frequency variations and recover back to data. The proposed design has been simulated, verified, and implemented on a complete prototype. Various testings have been carried out, and the results are satisfactory.

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Robust $H_\infty$ Output Feedback Control of a Rotary Capacitive Power Transfer System

Cited by 15 publications

References 33 publications

Single-Stage Duty-Controlled Half-Bridge Inverter for Compact Capacitive Power Transfer System

Single-Stage Duty-Controlled Half-Bridge Inverter for Compact Capacitive Power Transfer System

Robust Recursive Regulator for Systems Subject to Polytopic Uncertainties

Underground Communications Using Capacitive Data Transfer Devices

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