Feature: Wireless power


Figure 2: AC measurement block diagram Te values of RDC (2)


where, IR(AC)


IR(DC) RDC RDC


and RAC using an LCR meter. Te DC rated current IR(DC)


for small signals can be measured of the coil is


measured using the measurement setup as mentioned before. Te values are determined using a WE in-house soſtware. Te IR(DC)


= rated AC current of the coil (RMS value) = rated DC current of the coil = DC resistance of the coil


= AC resistance of the coil (small signal) measurement setup is like the one used for AC rated current


measurement. Te coil is placed inside a temperature chamber. Using our in-house measurement soſtware, the maximum and minimum current values are set with a step size and hold time. Te hold time is defined as the time required for the coil temperature to remain in steady state until it switches to a higher current.


Figure 3: RMS current for WPT coil 760308101


Figure 4: Thermal camera image for WPT coil 760308101


24 November 2025 www.electronicsworld.co.uk


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