電工鋼硅鋼片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:

電工鋼硅鋼片：比總損耗(鐵損)specific total loss (iron loss)比總損耗是指磁極化強(qiáng)度按正弦變化，其峰值和頻率為特定值時(shí)，單位質(zhì)量材料所吸收的總功率，比總損耗用符號(hào) P (Jm/f)表示，單位為 W/kg（或 W/lb）。例：P1.7/50表示在磁極化強(qiáng)度在 1.7T、云南西雙版納當(dāng)?shù)仡l率在 50Hz 下測(cè)得的單位 kg（或 lb）試樣的比總損耗；P1.7/60表示在磁極化強(qiáng)度在 1.7T、云南西雙版納當(dāng)?shù)仡l率在 60Hz 下測(cè)得的單位 kg（或 lb）試樣的比總損耗。3.2 磁極化強(qiáng)度(磁感應(yīng)強(qiáng)度)magnetic polarization (magnetic induction)磁極化強(qiáng)度是指試樣受交變磁場(chǎng)磁化時(shí)，特定磁場(chǎng)強(qiáng)度峰值的磁極化強(qiáng)度峰值，其符號(hào)為 J(H)，單位為 T(特斯拉)。例：J800表示對(duì)應(yīng)于磁場(chǎng)強(qiáng)度 H 為 800A/m（用峰值表示）下的磁極化強(qiáng)度。3.3 比視在功率 specific apparent power對(duì)于設(shè)定的磁極化強(qiáng)度和頻率值，磁化單位質(zhì)量的鐵芯所消耗的交流電源總功率為比視在功率，其符號(hào)為 Ss，單位為 VA/kg。例：Ss1.7/50表示磁極化強(qiáng)度在 1.7T、云南西雙版納當(dāng)?shù)仡l率在 50Hz 下測(cè)得的單位 kg 試樣的比視在功率。3.4 A 計(jì)權(quán)磁致伸縮速度水平 A-weighted magnetostriction velocity level,LVA 當(dāng)磁極化強(qiáng)度隨時(shí)間按正弦規(guī)律變化，其峰值為某一標(biāo)定值，變化頻率為某一標(biāo)定頻率時(shí)，單位長(zhǎng)度電工鋼片（帶）沿磁化方向上發(fā)生磁致伸縮所引起的表面振動(dòng)聲壓水平為 A 計(jì)權(quán)磁致伸縮速度水平。