A Frequency Control Method for Regulating Wireless Power to Implantable Devices

Abstract

This paper presents a method to regulate the power transferred over a wireless link by adjusting the resonant operating frequency of the primary converter. A significant advantage of this method is that effective power regulation is maintained under variations in load, coupling and circuit parameters. This is particularly important when the wireless supply is used to power implanted medical devices where substantial coupling variations between internal and external systems is expected. The operating frequency is changed dynamically by altering the effective tuning capacitance through soft switched phase control. A thorough analysis of the proposed system has been undertaken, and experimental results verify its functionality.

A novel DCES based voltage control stragety for critical load supplied by wireless power

“…It was first proposed by Nikola Tesla in 1890s, and it is regarded as an emerging technology to transfer power nowadays. WPT is a hot spot of present research which can be applied effectively in a wide range of areas, such as electric vehicle [2], smart home [3], distributed ocean system [4], implantable medical device [5], etc. Compared with the traditional power transfer means, WPT has many advantages.…”

A Short-Current Control Method for Constant Frequency Current-Fed Wireless Power Transfer Systems

“…Moreover, real-time load and mutual inductance identification methods also require complex calculations and detection circuits [13,14], so some real-time and simple methods need to be used. By using a passive zero crossing point detection method such as the ZVS method, operation frequency S f can keep up with ZVS f in real-time [9,10,15]. However, due to the time lag on the detection route, there exists a mismatch between S f and ZVS f .…”

A Power Regulation and Harmonic Current Elimination Approach for Parallel Multi-Inverter Supplying IPT Systems

“…The potential advantages of IPT systems include immunity to ice, water, and other chemicals; environmental friendliness; and zero maintenance requirement. In addition, IPT systems have been adopted in a number of applications, including in the wireless charging of biomedical implants [10], mining applications [11], underwater power supply [12], electric vehicles [13]- [20], and railway applications [21], because of their ease of use, environmental sustainability, and Manuscript received Nov. 9, 2015; accepted Jan. 28,2016 Recommended for publication by Associate Editor Dong-Myung Lee.low lifecycle cost.…”