A Full Power Range ZVS Control Technology for Bidirectional Inductive Power Transfer System

Cui, Chao; Liu, Yujing; Pehrman, Daniel; Huang, Xiaoliang; Zhang, Qianfan

doi:10.1109/iecon43393.2020.9255256

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Figure 3 shows the generic structure of an EV wireless charger. The structure from the primary DC/AC converter to the secondary AC/DC converter constitutes a Dual Active Bridge (DAB) [54]. It can be observed that the power converters are operated according to the instructions sent by the controllers.…”

Section: Model For Ev Bidirectional Wireless Chargermentioning

confidence: 99%

Review on Control Techniques for EV Bidirectional Wireless Chargers

2021

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Due to their flexibility, Electric Vehicles (EVs) constitute an important asset for the integration of renewable energy sources in the Smart Grid. In particular, they should have a dual role: as a controllable load and as a mobile generator with a low inertia. To perform these tasks, chargers must provide the electronics with a power flow from the grid to the vehicle and vice versa. This bidirectionality can also be implemented in wireless chargers. The power converters, the compensation networks and the coil misalignment must be considered when designing the control of these systems. This paper presents a review about the proposed algorithms to control the active and the reactive power flow in a bidirectional wireless charger.

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Section: Model For Ev Bidirectional Wireless Chargermentioning

confidence: 99%

Review on Control Techniques for EV Bidirectional Wireless Chargers

2021

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“…However, it increases the complexity of the WPT system and reduces the efficiency and robustness. 9,10 The phase-shift modulation strategy has been used in Cui et al 11 to adjust the output power by changing the phase-shift angle. However, when the phase-shift angle is large, the conditions for the inverter to achieve soft switching become worse, and hard switching often occurs, reducing the system efficiency.…”

Section: Introductionmentioning

confidence: 99%

Research on dual‐frequency modulation strategy of wireless power transfer system

Tang

Wang

Shi

et al. 2022

Circuit Theory & Apps

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Compared with traditional wired power transmission, wireless power transfer(WPT) has fully exhibited its key advantages of better safety and convenience, stronger reliability and electrical isolation, and less maintenance. Although the phase-shift modulation strategy has been widely used in various WPT applications, it has certain limitations in terms of high-frequency hardswitching, which increases the power loss of the WPT system during voltage regulation. To achieve efficient operation over a wide range of load power, this paper proposes a dual-frequency modulation strategy for the WPT system. The advantages of the dual-frequency modulation strategy are the simple modulation logic and the lower switching loss. It maintains the optimal load impedance during constant voltage output and improves the overall efficiency of the system. For validation, we designed the control circuit and wrote the control program and built the experimental prototype of the WPT system to carry out the phase-shift modulation experiment and the dual-frequency modulation experiment, respectively. The experimental results show that the soft switching range and efficiency of the WPT system under the dual-frequency modulation strategy are better. At the rated output power, the efficiency of the WPT system under dual-frequency modulation strategy is 89.75%. The feasibility of the dual-frequency modulation strategy has been confirmed.

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Zero Voltage Switching for High Power Three-Phase Inductive Power Transfer With a Dual Active Bridge

Cui,

Pehrman,

Liu

et al. 2024

IEEE Access

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Inductive power transfer (IPT) technology used for charging electric vehicles faces challenges in transferring high power because the power capacity and switching losses of high-frequency semiconductor devices are limiting factors. A three-phase system is a common high-power solution and soft switching is crucial for efficiency-oriented applications with high switching frequencies. In addition, dual active bridge (DAB) topology is a suitable topology for soft switching and has advantages in controllability and high efficiency. Therefore, to obtain higher power and efficiency, this paper studies the zero voltage switching (ZVS) of a three-phase inductive power transfer system with a dual active bridge. The three-phase IPT system with a DAB is different from both the normal three-phase DAB converter and the single-phase IPT system with a DAB, so their ZVS conditions and ranges are also different and need to be studied. This paper investigates the conditions and operating range for realizing zero voltage switching of the three-phase IPT system with a DAB. Based on this, the efficiency of the system is improved by changing the load angle between the primary and secondary sides. Finally, a 60 kW three-phase IPT system with a DAB is built, and the experimental verification of the study is conducted.INDEX TERMS Dual Active Bridge (DAB), Inductive Power Transfer (IPT), Zero Voltage Switching (ZVS).

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A Full Power Range ZVS Control Technology for Bidirectional Inductive Power Transfer System

Cited by 5 publications

References 5 publications

Review on Control Techniques for EV Bidirectional Wireless Chargers

Review on Control Techniques for EV Bidirectional Wireless Chargers

Research on dual‐frequency modulation strategy of wireless power transfer system

Zero Voltage Switching for High Power Three-Phase Inductive Power Transfer With a Dual Active Bridge

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