自动控制仪器与软磁材料性能之间存在着密切的关系,这就使得软磁测量的重要性日渐突出,特别是在智能化日益发展的今天.对于不被认为是传统意义上的软磁材料的铁素体不锈钢材料,情况尤其如此.实验表明,为减小测量误差,应尽量选择与样品接触面尽可能大的极靴.因为无论是在弱场、中场还是强场下,极靴形状对样品测量结果的影响都是不可忽视的,特别是当极靴形状与样品的接触面很小的情况下.对于μmax所在的磁场值H(μmax),即使使用同一幅极靴进行测量,在不同的磁场下,测量值间也存在较大的差异.但极靴形状对材料最大磁通密度,也就是最大磁极化强度的影响不大.这些结果对磁路设计也很有借鉴意义.%There exists a close relationship between automatic control system and magnetic properties of soft magnetic materials, especially with the development of intelligent control technology, thus, soft magnetic measuring has become even more important. This is especially true for ferritic stainless steel, which traditionally is not regarded as soft magnetic material. We have found that, the contact surface of the samples with the magnetic poles should be as large as possible in order to reduce the measurement error. The shape of the magnetic poles will have distinct influences on the measured magnetic properties of the samples in low, middle and high magnetization fields, especially when their contact surface is small. For the value ofH(μmax), whereμmax gets its value, there is a obvious difference among the values measured at different magnetization field even using the same magnetic poles. But the shape of the poles has no effect on the value of maximum flux density, also maximum magnetic polarization. These results also can be used in magnetic circuit design.
展开▼
