摘要
基于毕奥—沙伐定律和铁磁理论,结合舰载消磁绕组敷设状态,分析通电消磁绕组产生的磁场特性,研究消磁绕组的通电电流及其与钢板的距离对钢板磁场的影响。结果表明,通电绕组产生的磁场随距离的减小而递增,随电流的变大而直线增大,且存在两个临界值:电流Ic和距离Dc,一旦绕组电流或与钢板的距离超过临界值,其产生的磁场将超过钢板矫顽力,导致船体钢板固定磁化。另外,结合工程实践情况,对消磁绕组磁场的不同简化方法进行对比,发现各误差均不大于0.2%,即可以将绕组等效成无限长的直通电导线,以快速计算判断其磁场大小。
On the basis of Biot-Savart Law and ferromagnetism theory, the characteristic of magnetic field induced by the degaussing winding with electrification is analyzed, and the effects of current and distance from steel of winding on steel are investigated. The result shows that the magnetic field induced by degaussing winding increases as the distance shortens or as the current rises. There are two critical values for degauss- ing winding： critical current Ic and critical distance Dc, and if the current and distance of degaussing wind- ing exceeds Ic and Dc, the magnetic field induced will exceed the coercive force Hc, which leads the steel to be magnetized permanently. In addition, by combining with practice, different simplification methods are discussed for the magnetic field of winding. It is found out that the relative error is within 0.2%, which reveals that the magnetic field of winding can be simply equated as a straight electrical wire in calculation.
出处
《中国舰船研究》
CSCD
北大核心
2015年第1期126-130,共5页
Chinese Journal of Ship Research
基金
国家部委基金资助项目
关键词
消磁绕组
船舶
磁场强度
degaussing winding
ship
intensity of magnetic field
