A Design of Online Fault Diagnosis System Based on ESR for Electrolytic Capacitors Zhenhua An, Guixin Zhang, Kaidi Li, Xun Wu, Shu Cheng and Haiyang Qiao JNWPU, 37 3 (2019) 594-600 Published online: 20 September 2019 DOI: 10.1051/jnwpu/20193730594