vf控制,電流波形不穩
近期公司研制一臺變頻器,5級級聯到380v(實驗樣機),控制采用vf,帶小電機500w沒問題,帶7.5kw電機頻率在30hz以下也沒問題,》40hz電流波形上下不等,電機轉速不穩,不知哪位大俠做過,給點提示,先謝謝了.
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Maybe there is something wrong with your DC voltage measurement.I do not know the "5級級聯到380v".Have you measured your dc voltage with 500W and 7500W load. Or you may try to measure the small-scale dc voltage which fed to your MCU. I met the problem, the dc voltage measurement delay lead to a bad output current.
Good luck.
Good luck.
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@tanma
MaybethereissomethingwrongwithyourDCvoltagemeasurement.Idonotknowthe"5級級聯到380v".Haveyoumeasuredyourdcvoltagewith500Wand7500Wload.Oryoumaytrytomeasurethesmall-scaledcvoltagewhichfedtoyourMCU.Imettheproblem,thedcvoltagemeasurementdelayleadtoabadoutputcurrent.Goodluck.
謝謝,已解決
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