SIMPLE CAPACITY ESTIMATING SYSTEM FOR THE FAULT DIAGNOSIS OF A DC LINK CAPACITOR ON A POWER TRANSFORMER APPLIED ON A CUSTOMIZED POWER DEVICE

摘要

PURPOSE: A simple capacity estimating system for the fault diagnosis of a DC link capacitor on a power transformer applied on a customized power device is provided to lower the manufacturing cost and improve portability since a separate meter is not used and a complex separate circuit configuration is not necessary.;CONSTITUTION: A simple capacity estimating system comprises a DC power supply(11), direct current link capacitors(14,15,16) for energy storage, a charging switch(12) which charges energy in direct current link capacitors, and a discharging switch(13) which discharges the energy from the direct current link capacitor. A load terminal(17), a discharged electricity energy calculating block(21), and a capacitance estimation block(22) receives the energy saved in the direct current link capacitor.;COPYRIGHT KIPO 2012