Overview of Megahertz Wireless Power Transfer

Wang, Yijie; Zhan, Sun; Guan, Yueshi; Xu, Dianguo

doi:10.1109/jproc.2023.3265689

Cited by 22 publications

(6 citation statements)

References 173 publications

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Section: Proposed Topology and Analysismentioning

confidence: 99%

“…Substituting ( 8) and ( 9) into (7), the output power Pout can be obtained as (10). In (10), the output power depends on the duty cycle (D), inverter output voltage (VAB), frequency (w0), and mutual inductance (M) kept constant. Figure 7 shows the inverter output voltage VAB, S5, and S6 switching pulse, rectifier input voltage (VCD), and secondary current (I2).…”

Section: Proposed Topology and Analysismentioning

confidence: 99%

“…The contact charging is not safer while charging the battery and heavy gauge cables are needed. The wireless power transfer (WPT) has many applications mainly biomedical implants, consumer electronics, and even electric vehicles, this approach can be advantageous since it does not require electrical contacts to transfer power [9], [10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of 1.5 kW secondary side power controlled method in a inductive wireless power transfer system

Bhavsingh,

Gotluru,

Bhukya

et al. 2024

IJPEDS

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The contemporary and utilitarianism of the existing consumer world is advancing towards the better world technical benefits in the electrical world such as wired phase to wireless phase utilizing its volatile features. This paper addresses the battery performance in constant current (CC), constant voltage (CV) through inductive wireless power transfer (IWPT) systems. To analyze this workable mode, the researcher has proposed the series-series (S-S) compensation topology which is load independent current output. While charging the battery through wireless, the coil resistance is found to be affected by the battery's current and power. To figure out a practical solution, the researcher has introduced novel closed loop bi-directional switches with duty cycle control. The existing theoretical and simulated results have been analyzed with 1.5 kW, 120 mm air-gap and 85 kHz frequency. In this connection, the researcher has self-developed a prototype to better understand the theoretical perceptions of the proposed WPT system.

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Section: Proposed Topology and Analysismentioning

confidence: 99%

Section: Proposed Topology and Analysismentioning

confidence: 99%

See 1 more Smart Citation

Investigation of 1.5 kW secondary side power controlled method in a inductive wireless power transfer system

Bhavsingh,

Gotluru,

Bhukya

et al. 2024

IJPEDS

View full text Add to dashboard Cite

show abstract

“…Wireless power transfer (WPT) technologies are becoming promising in various application areas due to the crucial problems of range anxiety and bulky battery [1][2][3][4][5]. The wide bandgap (WBG) semiconductor devices, such as GaN HEMTs and SiC, boost the performance of wireless power applications due to their unique material characteristics: low parasitic capacitance, on-state resistance, and high breakdown voltage.…”

Section: Introductionmentioning

confidence: 99%

Power Receiving Unit for High-Power Resonant Wireless Power Transfer

Liu,

Tang,

Shieh

et al. 2023

Energies

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A new power receiving unit (PRU) is proposed in this paper for resonant wireless power transfer (WPT), which is characterized by the capability of attracting high power from the power transmitting unit (PTU). The resonant WPT is designed for delivering the electrical power to the PRU attached on an electrical vehicle (EV) chassis 50 cm away from a PTU installed on the ground. The proposed PRU uses only the passive elements such as inductors, diodes, and capacitors, which need no initial power from the EV. It is then applicable for charging a battery to several hundred volts for even a first-time charging battery. For a resonant WPT at a switching frequency of 4 MHz, the proposed PRU behaves as a negative impedance converter (NIC) itself in the subharmonics of 4 MHz. The NIC effect plus the subharmonic oscillation causes an instability current charging the battery connected to the PRU. In this paper, we simulated the PRU and performed the experiment. The experiment demonstrated a battery charging of 150 W from 50 cm away using three D-mode GaN HEMT transistors via the instability current ramp. The power transfer efficiency (PTE) improved as the power delivered to the load (PDL) increased. The peak PTE was 65% in the present findings. The simulation analysis showed that the circuit allowed itself be used to much higher power transfer when it is implemented with more GaN HEMT transistors connected in parallel. The theoretical derivation of the PRU circuit is also used to support both the experimental and simulation results.

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“…The traditional plug-in charging path is not convenient and sometimes unsafe; also this is the main reason for promoting and applying plug-in hybrid EVs and EVs. Wireless power transfer (WPT) system has many advantages like high reliability, flexibility, and security [8], [9]. It is accepted as a preferred technology for the charging of EVs in tailless TV; wireless flat-panel chargers designed for suitable electronic products, biomedical devices, and academia.…”

Section: Introductionmentioning

confidence: 99%

A receiver-side power control method for series-series magnetic topology in inductive contactless electric vehicles battery charger application

Bhavsingh,

Babu,

Mangu

et al. 2023

IJAAS

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Wireless power transfer (WPT) can be used to charge the battery conveniently and efficiently. In this paper, the investigation of high-efficiency S/S resonant magnetic topology in inductive wireless battery charging of electric vehicles (EVs) is analyzed, designed, and controlled. To regulate the output power efficiently rather than controlling the supply voltage, novel bidirectional switches are introduced to control the output power by using the duty cycle control method. The output power of the secondary side is derived and discussed based on the fundamental harmonic approximation (FHA) approach. A 1.5 kW, 120 mm distance, and 85 kHz resonance frequency are verified in MATLAB/Simulink.

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Overview of Megahertz Wireless Power Transfer

Cited by 22 publications

References 173 publications

Investigation of 1.5 kW secondary side power controlled method in a inductive wireless power transfer system

Investigation of 1.5 kW secondary side power controlled method in a inductive wireless power transfer system

Power Receiving Unit for High-Power Resonant Wireless Power Transfer

A receiver-side power control method for series-series magnetic topology in inductive contactless electric vehicles battery charger application

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