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This paper presents a closed loop control design for the class-E2 WPT system with the pre- and post-regulation. In the proposed WPT system, the output voltage is regulated by changing the switch-on duty ratio of the post regulator, whose information is transmitted to the primary side by wireless communication. At the transmitter side, the input current is minimized by changing the switch-on duty ratio...
Dynamic Wireless Power Transmission (DWPT) uninterruptedly charges the moving Electric Vehicles (EVs) through the powered roadway, providing a potential solution to the battery bottleneck. EVs need to obtain energy as much as possible to guarantee proper functioning. Meanwhile, it is necessary to fully utilize the powered roadway in order to economize energy and reduce paving cost. Based on the selected...
Wireless power transfer (WPT) or wireless energy transmission is the transmission of electrical power from a power source to a consuming device without using solid wires or conductors. In this paper we describe the implementation of the concept of wireless power transfer to transmit power from mobile phones to mobile phones. In our design we use simple inductive coupling and basic electrical circuits...
Wireless charging is gaining interest worldwide, mostly driven by electric vehicles (EVs) and consumer electronics. This paper presents the design and implementation of a contactless battery charger for electric vehicles. The power converter is based on SiC MOSFET devices and efficient power topologies, enabling to increase the operating frequency with the aim of minimizing system volume and weight...
Anywhere a primary electrical source is not available, batteries seem to be the only way to allow the use of stand-alone electrical facilities. Unfortunately, there are some issues related to the use of batteries such as the necessity of regularly checking their charge status and, eventually, proceeding to their replacement, as well as of caring for their treatment as special waste at the end of their...
In order to improve reliability and safety of an In-Wheel Motor, the Wireless In-Wheel Motor (W-IWM) using magnetic resonance coupling has been proposed. Transmitting power of the W-IWM is controlled by the primary inverter and the secondary converter. One of a technical issue of the W-IWM is transmitting power variation due to the load power variation and the coupling coefficient variation. In this...
To treat retinal degenerative diseases, a transcorneal electrical stimulation-based system is proposed which consists of an in vivo eye implant and an in vitro control device. The eye implant is wirelessly powered and controlled by the in vitro device to generate the required bi-phase current pattern for the transcorneal stimulation with an amplitude range of 5µA∼320µA, a frequency range of 10Hz∼160Hz...
A combination of an on-chip power control and a closed loop power control for inductively powered biomedical implants using inherent inverse load modulation as back channel is presented. Inverse load modulation is realized using an innovative internal on-chip power control. By shorting the secondary receiving coil to ground using varying switching pulse repetition rates the magnetic field is diminished...
The dynamic inductive power transfer for Electric Vehicles is a solution to fill the main drawback of electric vehicles, namely autonomy. Compatible with the static inductive charging, this solution also provides high added value because there are no more cable handling, the charge is done transparently to the user. This value can be a constraint if it is necessary to position the EV very precisely...
This paper presents a novel wireless power pick-up based on linear tuning control. The Linearly Tuned Parallel Pick-up (LTPP) is specifically designed for low power consumer electronic applications where the EMI (Electromagnetic Interference) needs to be minimized. The proposed pick-up has many advantages including smooth power regulation, ability to operate at high Q, low component count, and simple...
This study tests a deep-seated implantable ultrasonic pulser-receiver powered wirelessly by magnetic coupling. The energy-transmitting coil, which wraps around the body, is driven at 5.7 MHz using 1.2A to generate a magnetic field. A 2 cm receiving coil is positioned at the center of the primary coil for powering the implantable device. A capacitor-diode voltage multiplier is used to step-up the receiving...
A retinal prosthesis intended for rehabilitation of vision impaired patients will require continuous power supply in order to achieve real-time moving images. In this work, we explore the use of inductive coils fabricated using flexible circuit technologies for inductive powering of the implanted prosthetic device. We found that manufacturing technologies dictate the optimum operating frequency of...
This paper proposes a new method for power telemetry and wireless data transfer to biomedical implants. Confinement of the transferred energy within a predefined area, hence not influencing the neighboring sensitive circuitry on the microsystem, and also allowing for more than one telemetry link on the same platform and even operating at the same carrier frequency are among the advantages of the proposed...
A wireless communication system with a closed-loop power control function for bio-implantable applications is described which keeps the power dissipation of implantable unit at the allowable level for human body. The function is controlled by monitoring an excessive current at the implantable unit and limiting the power transmission at the external interrogator unit. The implantable unit with the...
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