Characteristics and Design of an Asymmetrical Duty-Cycle-Controlled LCL-T Resonant Converter

Borage, Mangesh; Nagesh, K. V.; Bhatia, M. S.; Tiwari, Sudeep

doi:10.1109/tpel.2009.2022627

Cited by 50 publications

(20 citation statements)

References 23 publications

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“…Each method or strategy operates by the same principal as the conventional strategy, but controlling different variables. In summary, three control strategies can be considered: the conventional phase shift (PS) control [8]- [9]- [10], asymmetrical duty cycle (ADC) control [11]- [12]- [13] and asymmetrical voltage cancellation (AVC) control [14]- [15]- [16]. By using one of these control strategies, the output voltage waveforms of the inverter will be determined by the following control angles:…”

Section: Voltage Regulationmentioning

confidence: 99%

Asymmetrical voltage-cancellation control for a series-series fixed-frequency inductive power transfer system

Peschiera

Aditya²,

Williamson³

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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The main objective of this paper is to study and analyze the power supply stage of a series-series (SS) fixedfrequency inductive power transfer (IPT) system, in order to suggest effective soft switching techniques to improve its performance. Because of the characteristics of the system, zero voltage switching (ZVS) operation was used and three control strategies were compared: phase-shift (PS) control, asymmetrical duty cycle (ADC) control and optimal asymmetrical voltage cancellation (o_AVC) control. The o_AVC control is found to be more efficient for this application. Additionally, this paper presents an inductive power transfer transformer (IPTT) prototype that was built in the laboratory, which helped validate the theoretical analysis and simulation results with practical tests. The plots and circuit simulations were obtained from MATLAB and SIMULINK respectively.

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Section: Voltage Regulationmentioning

confidence: 99%

Asymmetrical voltage-cancellation control for a series-series fixed-frequency inductive power transfer system

Peschiera

Aditya²,

Williamson³

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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“…The designed component values in the experimental prototypes of topology T 1 in [13], [14], [17], topology LA 2 in [16] and topology T 3 in [12] are used to obtain the input voltage-to-output current transfer functions from the simulation. The component values used for the simulation are summarized in table 1.…”

Section: A Approximate Equivalent Circuit Model Of Type-ii Rinsmentioning

confidence: 99%

“…The presence of a transformer winding capacitance changes the LCL-T RC into a fourth-order LC-LC topology, which has been shown to behave as a Type-II RIC [16]. The various modes of operation and issues in the design of a LCL-T RC with asymmetrical duty-cycle control are described in [17]. LCL-T RC topologies are also reported for various applications such as radio frequency inductive discharges [18], inverters for photovoltaic systems [19] and non-contact energy transmission systems [20].…”

Section: Introductionmentioning

confidence: 99%

Approximate Equivalent-Circuit Modeling and Analysis of Type-II Resonant Immittance Converters

Borage¹,

Nagesh²,

Bhatia³

et al. 2012

Journal of Power Electronics

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Resonant immittance converter (RIC) topologies can transform a current source into a voltage source (Type-I RICs) and vice versa (Type-II RICs), thereby making them suitable for many power electronics applications. RICs are operated at a fixed frequency where the resonant immittance network (RIN) exhibits immittance conversion characteristics. It is observed that the low-frequency response of Type-II RINs is relatively flat and that the state variables associated with Type-II RINs affect the response only at the high frequencies in the vicinity of the switching frequency. The overall response of a Type-II RIC is thus dominated by the filter response, which is particularly important for the controller design. Therefore, an approximate equivalent circuit model and a small-signal model of Type-II RICs are proposed in this paper, neglecting the high-frequency response of Type-II RINs. While the proposed models greatly simplify and speed-up the analysis, it adequately predicts the open-loop transient and small-signal ac behavior of Type-II RICs. The validity of the proposed models is confirmed by comparisons of their results with those obtained from a cycle-by-cycle simulation and with an experimental prototype.

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“…Secondly, its constant operating frequency eliminates bifurcation [18]. Thirdly, the track current is load independent [19][20][21], greatly simplifying the control and regulation of power. A detailed analysis of this power supply is given in section II.…”

Section: Introductionmentioning

confidence: 99%

A Parallel Topology for Inductive Power Transfer Power Supplies

Hao

Covic

Boys

2014

IEEE Trans. Power Electron.

170

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High power Inductive Power Transfer (IPT) systems operate at power levels of 100kW or more. However, existing high power IPT power supplies are typically designed for one power level and are expensive to make, due to the use of high power electronic components. This paper presents a parallel IPT power supply topology that can achieve high output power levels in a cost effective manner. The parallel topology can minimize uneven power sharing due to component tolerance, and does not require any additional reactive components for parallelization. In addition, it can continue to operate when a faulty parallel unit is electronically shut down, dramatically improving the availability and reliability of the systems. Furthermore, flexible output power levels may be achieved by connecting identical modules in parallel. A 6kW parallel power supply has been constructed by connecting three 2kW power supplies in parallel. The maximum efficiency of the power supply and track is measured to be 94%.

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Characteristics and Design of an Asymmetrical Duty-Cycle-Controlled LCL-T Resonant Converter

Cited by 50 publications

References 23 publications

Asymmetrical voltage-cancellation control for a series-series fixed-frequency inductive power transfer system

Asymmetrical voltage-cancellation control for a series-series fixed-frequency inductive power transfer system

Approximate Equivalent-Circuit Modeling and Analysis of Type-II Resonant Immittance Converters

A Parallel Topology for Inductive Power Transfer Power Supplies

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