A wireless power transfer system based on impedance matching network

Abstract

In this paper, we design a wireless power transfer (WPT) system based on the impedance matching network to achieve highly efficient wireless power transmission from a power source of 220 V/50 Hz to a 50 kHz transmission power to a 25 kHz alternating current (AC) output power. The proposed WPT system is composed of primary rectifier-filter module, DC-DC buck module, primary inverter module, primary impedance matching module, WPT module, secondary impedance matching module, secondary rectifier-filter module, and secondary inverter module. With the used of the secondary impedance matching module, the WPT module with the optimal transfer efficiency can be achieved. By introducing the primary matching module, the efficiencies of the primary inverter module and the DC-DC buck module are improved and meanwhile the equivalent input impedance of the WPT module is increased to suppress the excessive primary-side current caused by the removal of the receiving coil. The proposed prototype system has been fabricated, and the measurement results demonstrate that the system efficiency of 57% can be obtained with a distance of 30 mm at the 42 W input power.

Wireless Power Transfer: A Review of Existing Technologies

“…In [33], an impedance matching network-based wireless power transfer (WPT) system was developed to achieve high performance wireless power transmission from mains of 220V/50Hz to a 50 kHz transmission power to a 25 kHz alternating current (AC) output power.…”

Novel compact coupled resonator wireless power transfer system at 1 GHz using nested open loop ring resonators

“…22 The high efficiency WPT is obtained on Anowar et al 23 by employing tunable impedance matching. The authors in Yang et al 24 is developed a WPT system with the impedance matching network at a transmission distance of 30 mm. Three 5.8 GHz rectennas are presented using a capacitively coupled circular patch antenna (rectenna1), a two-element linear array (rectenna 2), and a four-element array (rectenna 3) for WPT applications.…”

Wireless Power Transfer Based on Spider Web–Coil for Biomedical Implants

“…Wireless power transfer plays an important part in BMI systems, as it is free from wires and negates the need for surgery when the battery is depleted. To enhance the resulting powertransfer efficiency and coupling between transmitter and receiver coils of WPT for BMI devices, researchers proposed several techniques and methods: coil geometry [11]- [13] different closed-loop and open-loop power control [14], power amplification [15] , [16] an impedance-matching network [17], [18] , misalignment conditions [19], and coupling configuration [20], [21]. In the biomedical field, WPT is essential as an energy source for biosensing and BMI devices [22] such as vital human-signs monitoring [23], heart-rate sensors [24], capsule endoscopy [25], left ventricular assist devices (LVAD) [26], deep micro-implants [27], and optogenetics applications [28].…”