Wireless Power Transfer for Medical Microsystems by Tianjia Sun Xiang Xie & Zhihua Wang

Wireless Power Transfer for Medical Microsystems by Tianjia Sun Xiang Xie & Zhihua Wang

Author:Tianjia Sun, Xiang Xie & Zhihua Wang
Language: eng
Format: epub
Publisher: Springer New York, New York, NY


4.1 Introduction

A wireless power transfer system is made of power antennas, power converters, and power management circuits. In the last chapter, we have introduced the power antenna techniques for biomedical microsystems. In this chapter, we present the power converters with detail.

The power converter is a circuit that converts electric energy from one from to another. In the wireless power transfers, the power converters are widely adopted to change energy between AC and DC domains, or change the voltage, the current, or the frequency. To clearly analyze the power converts, we firstly illustrate a circuit model of the converters as Fig. 4.1 shows. In this model, the up side part is the power transmitting circuit, and the down side part is the receiving circuit. The transmission is wirelessly achieved by using couplings between the antennas. Four power converters can be found in the model.

Fig. 4.1The circuit model of power converters in the wireless power transfer



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