Study of Current Ripple Generators for Accelerated Ageing of Capacitors

Upcoming developments in aerospace power applications demand the use of WBG semiconductors. They offer higher switching frequencies resulting in high-frequency ripple currents in the DC-link. These currents may lead to excessive stress on the DC-link capacitors. This paper proposes a modular ripple current generator for the accelerated ageing of capacitors using high-frequency ripple currents.