Transfer Function and Transient Response Analysis of Active Inrush Current Limiting Circuit on P-MOSFET with Equivalent RLC Series Circuit Load of Inverter

Munnik Haryanti (Universitas Dirgantara Marsekal Suryadarma, Jakarta, Indonesia)
Adi Nugroho (Universitas Dirgantara Marsekal Suryadarma, Jakarta, Indonesia)
Bekti Yulianti (Universitas Dirgantara Marsekal Suryadarma, Jakarta, Indonesia)
Yohannes Dewanto (Universitas Dirgantara Marsekal Suryadarma, Jakarta, Indonesia)

Ranah Research : Journal of Multidisciplinary Research and Development
Vol. 6 No. 3 (2024): Ranah Research : Journal Of Multidisciplinary Research and Development (Maret 2

Inrush current is a transient current surge when a piece of electrical equipment is turned on. One of the solutions is a P-MOSFET-based active inrush current limiter, which will be analyzed with KiCad software to analyze the transient response graph and a Python program to analyze the transfer function graph. From the observation, the circuit could reduce the inrush current amount which was initially ranging from 12mA – 12A to below 500nA, with a very low amount of ripple (under 100nA peak-to-peak). The transfer function graph from the RLC load represents its transient response graph, and the transfer function graph of the inrush current limiter with load creates a logarithm function. Keywords: inrush current, P-MOSFET, transient response, transfer function, ripple