A Parameter Recognition Based Impedance Tuning Method for SS-Compensated Wireless Power Transfer Systems

This article presents a parameter recognition-based impedance tuning method for the impedance mismatch caused by capacitance drift and coil misalignment in series-series-compensated wireless power transfer (WPT) systems. First, a parameter recognition method is proposed to identify the unknown parameters of the resonant circuits by only...

Contactless Inductive Power and Data Transfer: For use in E-Textiles

Distributing power and data around a garment is a common problem in sensor enabled e-textiles, as connecting separate electronic subsystems together using connectors and wires has proven to be unreliable and cumbersome. In this work a solution is presented that will eliminate the connectors by using two pairs of short-range wireless inductive...

Charge your boat (Wireless): Spatial-temporal challenges for location of future charging stations for electric vessels in Amsterdam

In recent years an effort to tackle pollution and achieve sustainability has been made throughout the world. In terms of energy and mobility, this has resulted in low or emission-free mobility implementation. Electric mobility in an urban area requires a well thought development plan, especially when considering the charging infrastructure...

Benchmark of Different Compensations for Wireless Power Transfer with DCDC Converters Included

The compensation network in wireless power transfer (WPT) system has many functions, including increasing efficiency, providing constant voltage/current output, reducing volt-ampere rating, etc. With the popularity of wireless charging for electric vehicles, more and more compensation topologies with distinctive characteristics are proposed....

Using Overlapped Resonators in Wireless Power Transfer for Uniform Electromagnetic Field and Removing Blank Spots in Free Moving Applications

We propose an induction link based on overlapping arrays to eliminate blank spots on the electromagnetic field for moving object applications. We use two arrays of four aligned coils that have a 50% overlap between the two plates. This mechanism compensates for the internal coil power drop at positions in the boundaries between two adjacent...

A Mode-Switching Based Phase Shift Control for Optimized Efficiency and Wide ZVS Operations in Wireless Power Transfer Systems

This article proposes a mode-switching-based phase shift control (MS-PSC) for wireless power transfer (WPT) systems, which is able to achieve power regulation, load matching, and wide ZVS operations simultaneously without using additional dc-dc converters. Based on the mode transitions between the full-bridge, mixed-bridge, and half-bridge...

A Crystal-Less Clock Generation Technique for Battery-Free Wireless Systems

The size of wireless systems is required to be reduced in many applications, such as ultra-low-power sensor nodes and wearable/implantable devices, where battery and crystal are the two main bottlenecks in system miniaturization. In recent years, battery-free radios based on wireless power transfer (WPT) have shown great potential in...

Design of a Low-Profile Receiver of 3.3 KW wireless charger

The usage of physical space in an Electrical vehicle is a roadblock to achieving peak performance in wireless charging applications. Components like the receiver, onboard power electronics, etc. have to be arranged in such a way that challenges like bulkiness, power density, thermal management is handled to achieve maximum operating life of...

Study on Soft Start-Up and Shut-Down Methods for Wireless Power Transfer Systems for the Charging of Electric Vehicles

The increase in popularity of electric vehicles (EVs) and the pursuit of user convenience makes wireless power transfer (WPT) an attractive technology for the charging of batteries. The usage of WPT in e-transportation is not straightforward because the current standardization limits the allowed operating frequency range and magnitude of the...

Advantages and Tuning of Zero Voltage Switching in a Wireless Power Transfer System

In charging applications, wireless power transfer (WPT) is mostly used in the form of inductive power transfer with magnetic resonant coupling. Therefore, both the transmitter and the receiver coils are combined with capacitors, such that only active power is transferred. To evaluate the operation of the WPT charging system, its equivalent...

Design of 3D Wireless Power Transfer System Based on 3D Printed Electronics

2D coil design limits the use of wireless power transfer (WPT) in many products with freeform outer shapes. In this paper, enabled by 3D printed electronics, we propose a systematic approach to design and fabricate 3D coils for WPT. Based on the circular spiral and rectangular spiral patterns, 3D receiver and transmitter coils can be...

Control of a resonant wireless e-bike charging converter

The Wireless Power Transfer (WPT) has been introduced decades ago for low power applications, and more recently, it has been used for industrial high power applications. WPT is gaining popularity because it presents several advantages over the power transfer through cable, such as the galvanic insulation between the power source and the load,...