A Low-Subharmonic, Full-Range, and Rapid Pulse Density Modulation Strategy for ZVS Full-Bridge Converters

Li, Hongchang; Chen, Shuxin; Fang, Jingyang; Tang, Yi; Rooij, Michael A. de

doi:10.1109/tpel.2018.2889116

Cited by 36 publications

(15 citation statements)

References 21 publications

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“…Fortunately, the recently proposed zero-voltage-switching (ZVS) full-bridge pulse-density modulation (PDM) WPT system can well satisfy the tuned condition while maintaining soft switching and control capabilities [10]. With the improved PDM strategy [11], such a system has become one of the best platforms for the dynamical behavior studies. Fig.…”

Section: Tuned Wpt Systemmentioning

confidence: 99%

“…The WPT system and the modulation strategy described in [11] were used for the experiment. The circuit diagram of the system was as shown in Fig.…”

Section: Experimental Testsmentioning

confidence: 99%

“…Symmetrically, the voltages and currents of the rectifier are denoted by v2(t), i2(t), u2(t), and iL2(t), respectively. In this system, the inverter and the rectifier are modulated as per the specified pulse densities d1(t) and d2(t), respectively, to control the conversion ratios [10,11]. The ZVS inductors LZVS1 and LZVS2 provide ZVS currents to discharge the switch output capacitances to ensure the soft switching at various operating points.…”

Section: Tuned Wpt Systemmentioning

confidence: 99%

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Reduced-Order Dynamical Models of Tuned Wireless Power Transfer Systems

Fang

Tang

2018

2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)

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Dynamical models of wireless power transfer (WPT) systems are of primary importance for the dynamical behavior studies and controller design. However, the existing dynamical models usually suffer from high orders and complicated forms due to the complex nature of the coupled resonances and switched-mode power converters in WPT systems. This letter finds that a well-tuned WPT system can be accurately described by a much simpler dynamical model. Specifically, at the tuned condition, the existing dynamical model can be decomposed into two parts. One is controllable and the other one is uncontrollable. The former should be considered in the modeling while the latter can be ignored because it always exponentially converges to zero. For illustration, the recently proposed zero-voltage-switching full-bridge pulse-density modulation WPT system is modeled as an example since such a system can efficiently operate at the tuned condition with soft switching and control capabilities. The derived model was verified in experiments by time-domain and frequency-domain responses. 1Index Terms -Dynamical model, wireless power transfer.I.

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Section: Tuned Wpt Systemmentioning

confidence: 99%

“…The WPT system and the modulation strategy described in [11] were used for the experiment. The circuit diagram of the system was as shown in Fig.…”

Section: Experimental Testsmentioning

confidence: 99%

Section: Tuned Wpt Systemmentioning

confidence: 99%

See 1 more Smart Citation

Reduced-Order Dynamical Models of Tuned Wireless Power Transfer Systems

Fang

Tang

2018

2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)

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“…Theoretically, a reversely connected inverter becomes a rectifier. For example, the half bridge inverter, full bridge inverter, and class E inverter become half bridge rectifier [55], full bridge rectifier [56,57], and class E rectifier [58], as shown in Figure 2.17 However, for the rectifier, the ac power is from the resonator and hence the switches need to turn ON and OFF following the phase of ac power. Taking Q1 in Figure 2.17 as an example, when ac power is flowing to Vo that io>0, Q1 shall be turned ON.…”

Section: High Frequency Rectifiersmentioning

confidence: 99%

“…Meanwhile, Coss is short-circuited and the stored energy is therefore consumed by the device. In The electric charge of one device, Qoss, can be expressed as [1,56] in oss oss in oss-eq 0…”

Section: Soft Switchingmentioning

confidence: 99%