comsol变压器噪声分析

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本文档是以ABB公司具体仿真为参考，通过对仿真过程及仿真结果的分析，阐述了噪声在变压器中的影响。三三ABABPRODUCTIOSTAR COST OFDESIGN CHANGETIMEPRODUCTIONSTARTPOSSIBILITY TOCHANGE DESIGNTIMEABThey can be considered as the gearboxes of the electrical gridABABNo-load noise(core noise)Sound powerLoad noise (winding noise)RadiationTank resonanceTankVibrationOiltransmissiontransmissionIndingCoreWindingsMagnetic pull注上计ElectromagneticMagnetostrictionorceNO-LOADLOAD CURRENTABn x 100 Hz(n x 120 Hz) with n=2, 3WAABdBln requency Response H1(4508(2), PCB208A03 Ref )-STS Measurement 11(Magnitude(m/s/N]Amplitude3533025f, ffr f213420Frequency1500102003008000204008501001200140016018002cFrequency HzEc;415AB