Magnetic　components　are　important　parts　of　power　converters.　The　accurate　core　loss　measurement　is　very　important　for　the　optimization　of　magnetic　components.　To　improve　the　measurement　accuracy　of　the　traditional　dual-winding　AC　power　method　for　core　loss　measurement　with　high-frequency　excitation,　the　measurement　principle　and　error　source　of　the　inductor　voltage　compensation　AC　power　method　are　analyzed　in　detail.　Based　on　the　error　problem　that　the　core　loss　of　magnetic　components　with　high　impedance　angle　is　measured　with　the　inductor　voltage　compensated　AC　power　method　under　incomplete　compensation,　the　inductor　voltage　partially　compensated　AC　power　method　is　proposed　to　accurately　measure　the　core　loss　under　arbitrary　waveform　excitation　in　this　article.　Finally,　the　measurement　platform　is　established　under　the　condition　of　incomplete　compensation.　The　maximum　relative　error　of　this　method　for　core　loss　measurement　of　the　powder　core　with　50　kHz　sine　wave　excitation　is　13.54%,　and　the　maximum　relative　error　of　core　loss　measurement　of　the　powder　core　with　50　kHz　rectangular　wave　excitation　is　9.8%.　Experimental　results　show　that　the　core　loss　of　magnetic　powder　core　under　sine　wave　and　square　wave　excitation　can　be　accurately　measured　by　the　proposed　method.　©　2022,　Science　Press.　All　right　reserved.