Synthesis of Negative Inductance for Power Applications

Negative inductance does not exist in the real world. Such absence limits the development of many electrical systems and the removal of undesired inductance, which has long been addressed by complicated resonance-based compensation methods. In this article, we present a practical realization of negative inductance for power processing applications that will open up an entirely new direction for electrical systems design and can lead to significant improvement in power efficiency. We show that by using two power converters and appropriate control, we can obtain a standalone negative inductance that can directly cancel an existing positive inductance or any portion of it. This breakthrough contributes to the advancement of negative reactance technologies beyond the small-signal limitations of conventional analog impedance converters. The negative inductance device introduced here offers convenient manipulation of inductive properties that can significantly enhance efficiency and power capacity, opening new avenues for sustainable energy applications. © 1986-2012 IEEE.