An Inductive Power Transfer System With a High-Q Resonant Tank for Mobile Device Charging

Li, Qifan; Liang, Yung C.

doi:10.1109/tpel.2015.2424678

Cited by 67 publications

(21 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental result show that with a primary coil Q of 1200, the proposed IP T system allows power to be trans ferred at a maximum air gap distanc e to coil diameter ratio of 1.46 for a highest efficiency of 87% at the resonant frequency at 106 KHz [3].…”

Section: Relevant Literaturementioning

confidence: 95%

Design of Handphone Wireless Charger System Using Omnidirectional Antenna

Yudhana

Djohar

2017

Jurnal Ilmiah Teknik Elektro Komputer Dan Informatika

View full text Add to dashboard Cite

Using cable as power transmission medium caus e problem in flexibility and aesthetics. Wireless power transmission for charging handphone released nowadays still using antenna with radiation pattern focus in one direction, that is just toward the top, and if the ant enna was shifted then power transmitted will be lose. The purpose of this research is to produce wireless power charger system used for charging handphone power using resonator based on omnidirectional antenna and test the performance. The device in this research was designed in two main part, that is transmitter and receiver. In transmission section, there is power supply used for supplying power to oscillator to generat e oscillating signal in the form of electrical power to be transmitted to rec eiver via antenna in the form magnetic field. In receiver section, receiver antenna received the power transmitted that is still in the reach of magnetic field generated by transmitter. The power that is still in the form of oscillating signal, then stabilized for the purpose of handphone power using rectifier and voltage regulator. Design has been made successfully to the form of handphone battery power wireless charger using omdirectional antenna which consist of two main part, that is transmitter and receiver. The transmitted power is 3.058 watt with frequency 714 KHz, and receiver received the power and then stabilized the signal to produce output power 58.706 miliwatt. This device can transmit power in all directions horizontally (angle 360°). This device also tested with some kind of obstacle, with the res ult almost all obstacle still could transmit the power except metal.

show abstract

Section: Relevant Literaturementioning

confidence: 95%

Design of Handphone Wireless Charger System Using Omnidirectional Antenna

Yudhana

Djohar

2017

Jurnal Ilmiah Teknik Elektro Komputer Dan Informatika

View full text Add to dashboard Cite

show abstract

“…Traditional WPT systems are not robust against alteration of distance and misalignment between coils [5,16], and variations in the terminating impedance of an electric power grid or battery over time [1]. To date, several techniques have been proposed to optimize the efficiency of power transfer, which include dynamic adjustment of operating frequency (resonant-frequency tracking) [17,18], combination of multiple receivers and repeaters for adaptive impedance matching [19], and adding nonlinear tuning elements in circuits [7,10]. For these often used WPT schemes, when the coupling factor (as a function of distance and alignment between coils) changes, the operating frequency must be adjusted accordingly to maintain a high transfer efficiency [20,21].…”

Section: Introductionmentioning

confidence: 99%

Robust extended-range wireless power transfer using a higher-order PT-symmetric platform

Sakhdari

Hajizadegan

Chen

2020

Phys. Rev. Research

View full text Add to dashboard Cite

A fundamental challenge for the nonradiative wireless power transfer (WPT) resides in maintaining the stable power transmission with a consistently high efficiency under dynamic conditions. Here, we propose and experimentally demonstrate that a frequency-locked WPT system satisfying the higher-order parity-time (PT) symmetry can achieve a near-unity power transfer efficiency that is resilient to effects of distance variation and misalignment between coils, and impedance fluctuations in electric grids. In specific higher-order PT electronic systems, a purely real-valued and coupling-invariant (nonbifurcated) eigenfrequency would enable the robust and efficient wireless charging without frequency hopping or adaptive impedance matching, even for midrange operation. We envision that this WPT technique may provide reliable, fast and efficient power delivery for a variety of consumer electronics, electric vehicles, and medical devices.

show abstract

“…Recently, the magnetic coupling resonant WPT has found widespread applications, such as wireless sensors, electrical vehicles, and wireless household appliances [1][2][3][4]. This type of WPT system is non-radiative with ignorable radiative loss [5], and often operates in the close-coupling condition where the transfer range is approximately equal to the diameter of the coils.…”

Section: Introductionmentioning

confidence: 99%

“…This type of WPT system is non-radiative with ignorable radiative loss [5], and often operates in the close-coupling condition where the transfer range is approximately equal to the diameter of the coils. Therefore, the transfer efficiency is not only high, but also remains nearly unchanged in a certain range even when the gap and misalignment varies [1,3,6]. In order to satisfy the condition of close-coupling, the operating frequency is often set to several kHz-several MHz, and the quality-factor (Q) should be as high as 200-2000 [3,5,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the transfer efficiency is not only high, but also remains nearly unchanged in a certain range even when the gap and misalignment varies [1,3,6]. In order to satisfy the condition of close-coupling, the operating frequency is often set to several kHz-several MHz, and the quality-factor (Q) should be as high as 200-2000 [3,5,7,8]. However, many factors, e.g., environmental changes, aging of the resonant tanks, and errors of individual components of mass production, may lead to variations of the operating frequency or circuit parameters including the inductances and the capacitances, which result in severe detuning in the high-Q resonant tanks [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Frequency-Splitting-Free Synchronous Tuning of Close-Coupling Self-Oscillating Wireless Power Transfer

Ren

Wen-an

2016

Energies

View full text Add to dashboard Cite

Abstract:The synchronous tuning of the self-oscillating wireless power transfer (WPT) in a close-coupling condition is studied in this paper. The Hamel locus is applied to predict the self-oscillating points in the WPT system. In order to make the system operate stably at the most efficient point, which is the middle resonant point when there are middle resonant and split frequency points caused by frequency-splitting, the receiver (RX) rather than the transmitter (TX) current is chosen as the self-oscillating feedback variable. The automatic delay compensation is put forward to eliminate the influence of the intrinsic delay on frequency tuning for changeable parameters. In addition, the automatic circuit parameter tuning based on the phase difference is proposed to realize the synchronous tuning of frequency and circuit parameters. The experiments verified that the synchronous tuning proposed in this paper is effective, fully automatic, and more robust than the previous self-oscillating WPT system which use the TX current as the feedback variable.

show abstract

An Inductive Power Transfer System With a High-Q Resonant Tank for Mobile Device Charging

Cited by 67 publications

References 27 publications

Design of Handphone Wireless Charger System Using Omnidirectional Antenna

Design of Handphone Wireless Charger System Using Omnidirectional Antenna

Robust extended-range wireless power transfer using a higher-order PT-symmetric platform

Frequency-Splitting-Free Synchronous Tuning of Close-Coupling Self-Oscillating Wireless Power Transfer

Contact Info

Product

Resources

About