The literature reports various measurement errors when using voltage/current probes, or coaxial cables placed directly into the primary magnetic field. Presently, measuring the performance of the secondary side of LCWPT systems while they are in operation can be problematic. This paper presents a novel wireless measurement system (WMS) that is used to collect real-time performance data from the secondary circuit (implant), while testing LCWPT systems. Such an application employs a large primary coil and a much smaller moving secondary coil, which can be defined as a loosely coupled WPT (LCWPT) system. In our application, we use WPT to power biomedical implants for telemetry acquisition from small rodents, where rodent behavior data is used to study disease models. When designing and testing WPT systems, reliable measurement of system performance is essential. The performance of wireless power transfer (WPT) systems is a function of many parameters such as resonance matching, coil quality factor, system impedance match, and others.
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