Selective Wireless Power Transfer to Multiple Loads Using Receivers of Different Resonant Frequencies

Zhang, Yiming; Lü, Tao; Zhao, Zhengming; He, Fei; Chen, Kainan; Yuan, Liqiang

doi:10.1109/tpel.2014.2347966

Cited by 165 publications

(50 citation statements)

References 15 publications

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“…However, for some practical applications, the selective wireless power transfer is required to feed the targeted receiver [74,75]. In the LC resonant circuit, if the operating frequency deviates from the nominal resonant frequency, there will be an obvious great impedance presented in the circuit.…”

Section: Selective Wireless Power Transfermentioning

confidence: 99%

An Overview of Resonant Circuits for Wireless Power Transfer

et al. 2017

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Abstract:With ever-increasing concerns for the safety and convenience of the power supply, there is a fast growing interest in wireless power transfer (WPT) for industrial devices, consumer electronics, and electric vehicles (EVs). As the resonant circuit is one of the cores of both the near-field and far-field WPT systems, it is a pressing need for researchers to develop a high-efficiency high-frequency resonant circuit, especially for the mid-range near-field WPT system. In this paper, an overview of resonant circuits for the near-field WPT system is presented, with emphasis on the non-resonant converters with a resonant tank and resonant inverters with a resonant tank as well as compensation networks and selective resonant circuits. Moreover, some key issues including the zero-voltage switching, zero-voltage derivative switching and total harmonic distortion are addressed. With the increasing usage of wireless charging for EVs, bidirectional resonant inverters for WPT based vehicle-to-grid systems are elaborated.

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Section: Selective Wireless Power Transfermentioning

confidence: 99%

An Overview of Resonant Circuits for Wireless Power Transfer

et al. 2017

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“…As the conventional single-transmitting (Tx) and single-receiving (Rx) circuits cannot fulfil the requirement of simultaneously providing power for multiple electrical devices in practical applications, the study on multi-Rx coils has made great progress in recent years [7,8,9,10,11,12,13,14,15,16,17,18,19,20,21]. For multi-Rx coil systems, the cross-coupling between the coils cannot be ignored when Rx coils are very close to each other.…”

Section: Introductionmentioning

confidence: 99%

“…When the load or cross inductance changes, the appropriate reactance should be reselected for compensation. Another way to eliminate the impact of cross-coupling between receivers is to exploit multiple frequencies [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…In a multi-Rx system, in addition to ensuring high efficiency of energy transmission, the controllability of power distribution is also very important in practical applications, which includes two aspects: the one is to selectively supply power to the target Rx; the other is that the power of the target Rx can be adjusted. Some researchers used the different frequencies to distinguish the Rxs [15,16,17], which makes the power distribution at the receiving Rx side selective. In [18], the author analysed the energy transmission direction of multiple coils on the same axis, of which each coil gets the same power by adjusting the distance between the coils.…”

Section: Introductionmentioning

confidence: 99%

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Multiple receivers wireless power transfer systems using decoupling coils to eliminate cross-coupling and achieve selective target power distribution

Zhuo

Luo

Zhang

et al. 2019

IEICE Electron. Express

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Current research in selectively supplying power to multi-receiving coil by each means has advantages and disadvantages. In response, the authors designed a more efficient selective power transmission and power allocation method. Multiple different specifications coaxial decoupling coils as the receiving coils. And the transmitting coils of the same specification as the receiving coils are integrally arranged on the same axis. Since the cross-coupling between the receiver coils can be eliminated. Therefore, excite the transmit coil can selectively supply power to the same specification receiver coil. And the load power can be designed by the impedance inverter of the receiving coil.

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“…By employing different resonant frequencies, selective WPT to multiple receivers can be achieved [19]. However, the corresponding output power is controlled by tuning the operating frequency, which essentially causes the sacrifice of power transmission efficiency [20]. Meanwhile, the corresponding analysis is limited to resistive loads only, which cannot be applied to industrial applications such as conveyor control or robotic control.…”

Section: Introductionmentioning

confidence: 99%

Wireless DC Motor Drives with Selectability and Controllability

et al. 2017

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This paper proposes and implements the concept of wireless DC motor drives, which can achieve the abilities of selective driving and controllable speed. Due to different resonant frequencies of the multiple energy receivers of the associated DC motor drives, the transmitter can be purposely tuned to the specified resonant frequency which matches with the specified receiver, hence driving the specified motor selectively. In the meantime, the burst fire control is used to regulate the operating speed of the motor working at the resonant frequency, hence retaining the maximum power transmission efficiency. Both finite element analysis and experimentation are given to verify the validity of the proposed wireless DC motor drive system. For exemplification, three different resonant frequencies, namely 60 kHz, 100 kHz and 140 kHz, are selected to energize three DC motors. Under the burst fire control method, the speed of each motor can be regulated separately and the wireless power transfer (WPT) system can achieve the measured power transmission efficiency of about 60%.

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Selective Wireless Power Transfer to Multiple Loads Using Receivers of Different Resonant Frequencies

Cited by 165 publications

References 15 publications

An Overview of Resonant Circuits for Wireless Power Transfer

An Overview of Resonant Circuits for Wireless Power Transfer

Multiple receivers wireless power transfer systems using decoupling coils to eliminate cross-coupling and achieve selective target power distribution

Wireless DC Motor Drives with Selectability and Controllability

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