本文針對(duì)電力機(jī)車牽引電機(jī)主極斷路故障，闡述了檢測(cè)電機(jī)主極裂紋的原理及具體電路設(shè)計(jì)方案，提出了主極裂紋檢測(cè)過程中克服提離效應(yīng)的方法和提高測(cè)量精度的措施。當(dāng)主極有裂紋缺陷時(shí)，通過探測(cè)線圈的磁通量就會(huì)發(fā)生變化，根據(jù)渦流大小及分布情況可檢測(cè)出影響線圈電特性的參數(shù)，從而發(fā)現(xiàn)牽引電機(jī)主極裂紋故障。由本方案設(shè)計(jì)的牽引電機(jī)主極裂紋渦流檢測(cè)裝置具有頻率可調(diào)，測(cè)量結(jié)果穩(wěn)定且精度高等優(yōu)點(diǎn)。
關(guān)鍵詞：牽引電機(jī)；電機(jī)主極；裂紋；渦流檢測(cè)；提離效應(yīng)
Abstract: This thesis expatiates the theory and design of eddy current testing the electrode flaw of traction motor aiming at electrode fault of traction motor. And it describes how to overcome the influence of the lift-off and improve measure precision in eddy current testing process. The magnetic flux changes in the detector winding if electrodes of motor has flaws. It can give signals about the flaws by the quantity and distribution of eddy current. The designed device of eddy current testing of electrode fault of traction motor have good
qualities such as frequency modulation characteristic and steady measure result and supernal precision.
Keywords: traction engine; electrodes of motor; flaw; eddy current testing; effect of the lift-off