50W250用途

电工钢硅钢片：同一产品在磁极化强度 1.5T、上海同城频率 50Hz 或 60Hz 条件下，按 GB/T 13789 单片法所测得的比总损耗值，参照 GB/T 13789-2008 附录 C 中指定的关系式 C.2a 向方圈法数据转换，两种检测方法所得比总损耗转换因子δP 的拟合关系可参照 GB/T 13789-2008 附录 C 关系式 C.3a，式中拟合有效区间为1.0T～1.8T，且该转换关系只适用于 0.23mm 及以上厚度规格激光刻痕产品，0.20mm 及以下厚度规格激光刻痕产品的转换关系根据实际检测、上海同城应用对比实验结果进行专项规定。当供应商和用户协商对 P1.5/50 和 P1.5/60有明确要求时，转换后的 P1.5/50和 P1.5/60应符合表 3、上海同城表 4、上海同城表 5、上海同城表 6、上海同城表 7、上海同城表 8 和表 9 的规定。7.1.7 其他测试条件下，转换系数 Fc 可由供应商和用户协商确定。7.1.8 当需要提供磁化曲线时，按 GB/T 13789 单片法所测得数据参照 GB/T 13789-2008 附录 C 关系式转换。注1：多年来习惯上采用磁感应强度，实际上爱泼斯坦方圈和单片测试仪测量的是磁极化强度。 磁感应强度与磁极化强度的关系：J＝B-μ0H ，H＝800A/m条件下，B和J的差异约为0.001T

电工钢硅钢片In addition to the types listed above, there are also some special purpose electrical steel plates, such as 0.15 and 0.20mm thick 3％ Si cold-rolled non oriented silicon steel strips and 0.025, 0.05, and 0.1mm thick 3％ Si cold-rolled oriented silicon steel strips, used for medium and high-frequency motors, transformers, and pulse transformers； 0.7mm thick 3％ Si high-strength cold-rolled non oriented silicon steel plate for relays and power switches； High strength cold-rolled electrical steel plate for new high-speed motor rotors； Low carbon electrical steel hot-rolled thick and cold-rolled plates for magnetic shielding and high-energy accelerator electromagnets such as medical magnetic resonance tomography scanners； 4.5％ to 6.5％ Si high silicon steel plates for high-frequency motors, transformers, and magnetic shielding.Generally, motors, transformers, and other electrical components are required to have high efficiency, low power consumption, small size, and light weight. Electrical steel plates are usually guaranteed to have magnetic properties based on core loss and magnetic induction strength [1] [2]. The requirements for the performance of electrical steel plates are as follows:Low core loss (PT)Iron core loss refers to the ineffective electrical energy consumed by an iron core when magnetized in an alternating magnetic field of ≥ 50Hz, abbreviated as iron loss, also known as alternating loss, and its unit is W/kg. The ineffective electrical energy consumed due to various obstacles caused by magnetic flux changes not only loses electrical energy through the heating of the iron core, but also causes temperature rise of the motor and transformer. The iron loss (PT) of electrical steel includes three parts: hysteresis loss, eddy current loss (Pe), and anomalous loss (Pa). Electrical steel plates have low iron loss, which can save a lot of electricity, prolong the operating time of motors and transformers, and simplify cooling devices. Due to the iron loss of electrical steel plates, which accounts for 2.5％ to 4.5％ of the annual electricity generation in various countries, countries always try their best to reduce iron loss in the production of electrical steel plates, and use iron loss as the most important indicator to assess the magnetic properties of products. The iron loss value of products is used as the basis for classifying product grades. Cold rolled oriented electrical steel: Cold rolled oriented electrical steel is a high-end product in the field of electrical steel. Compared with cold rolled non oriented electrical steel, its magnetism has strong directionality； It has superior high magnetic permeability and low loss characteristics in the direction of easy magnetization rolling. The iron loss of oriented steel strip in the rolling direction is only 1/3 of that in the transverse direction, and the ratio of magnetic permeability is 6:1. Application: The main purpose of cold-rolled oriented silicon steel strip is for transformer manufacturing.Full process cold rolled non oriented silicon steel coating: The surface of the full process cold rolled silicon steel is coated with a semi transparent insulation coating, which has different codes in different standards. Taking Baosteel‘s Q/BQB 480 2014 as an example: