<strong>Paper Title</strong><br>
Broadband Low Harmonic Sine Wave Power Converter<br>
<br>

<strong>Abstract</strong><br>
This paper utilizes the fast-switching characteristics of Gallium Nitride (GaN) devices to design a broadband low
harmonic sine wave power converter capable of modulating a stable sine wave current from 10 mHz to 30 kHz. The system
further adopts a three-phase interleaved synchronous buck converter architecture, with a switching frequency reaching 1
MHz, effectively enhancing the inductor current characteristics and significantly reducing the inductor ripple current.
Finally, by measuring the small signal AC voltage and current of a lithium-ion battery, the impedance magnitude and phase
at a given frequency can be derived based on Ohm's law, thereby enabling real-time online electrochemical impedance
spectroscopy (EIS) measurement.
Keywords - Electrochemical Impedance Spectroscopy (EIS),Internal temperature of the battery,State of Charge (SOC)