Study and Analysis of Yoke Loss of Single Sheet Tester for Magnetic Properties Measurement of Electrical Steel
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摘要: 单片测试仪是电工钢磁性能测量的常规设备,国家标准《用单片测试仪测量电工钢片(带)磁性能的方法》(GB/T 13789-2008,等同IEC 60404-3:2002)对相关方法有详细的规定。随着磁畴细化、薄规格及低损耗等特点的新型高等级电工钢产品的开发,人们对其测量设备性能的要求不断提高,实际测量时单片测试仪的磁轭产生的额外损耗已是一个不容忽视的因素。现行国家标准仅指出磁轭制作时应确保其损耗低且恒定,但是未要求对磁轭产生的额外损耗进行具体的处理。研究了单片测试仪磁轭损耗的测量方法,根据不同磁极化强度下对应的磁轭损耗,分析了其对电工钢磁性能测量结果的影响,并据此给出扣除磁轭损耗的方法。Abstract: Single sheet tester is conventional equipment for measuring the magnetic properties of electrical steel, the measurement methods have been well defined by the national standard GB/T 13789-2008 (IDT IEC 60404-3:2002) “Methods of measurement of the magnetic properties of magnetic sheet and strip by means of a single sheet tester”. With the development of new high-grade products with domain refinement, thin gauge, and low losses, the requirements for the performance of measurement equipment continue to increase, and the additional losses generated by the yoke of the single sheet tester during actual measurement is a problem that cannot be ignored. The current national standards only point out that the yoke should be made with low and constant losses, but no specific treatment is required for the additional losses generated by the yoke. This paper studied the measuring method of the loss generated by the yoke of a single sheet tester and analyzed its effect on the measuring result of the magnetic properties of electrical steel based on the data of yoke loss for different points of magnetic polarization, the method of deducting the yoke loss is given accordingly.
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Key words:
- electrical steel /
- single sheet tester /
- specific total loss /
- yoke loss
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表 1 单片样品损耗与磁轭损耗分析(无取向样品)
Table 1. Analysis of sample loss and yoke loss (non-oriented electrical steel sample)
测试点 J (T ) 总损耗 P (W) 比总损耗P s (W/kg) 磁轭损耗PY (W/kg) 修正后的比总损耗 $P'_{\rm{s}} $ (W/kg) 磁轭引入的偏差$\gamma $ 0.1 0.009991632 0.01310 0.00031 0.01269356 3.20% 0.2 0.046411512 0.06085 0.00086 0.05972246 1.89% 0.3 0.106117234 0.13913 0.00150 0.13716335 1.43% 0.4 0.181054474 0.23738 0.00225 0.23443003 1.26% 0.5 0.268515576 0.35205 0.00311 0.34797249 1.17% 0.6 0.367661549 0.48204 0.00407 0.47670383 1.12% 0.7 0.479003414 0.62802 0.00513 0.62129407 1.08% 0.8 0.603395419 0.79111 0.00628 0.78287631 1.05% 0.9 0.74141723 0.97207 0.00753 0.96219744 1.03% 1.0 0.896188373 1.17499 0.00888 1.16334746 1.00% 1.1 1.068158851 1.40046 0.01036 1.38687703 0.98% 1.2 1.260074458 1.65208 0.01191 1.63646483 0.95% 1.3 1.476900499 1.93636 0.01362 1.91850286 0.93% 1.4 1.72761419 2.26507 0.01552 2.24472177 0.91% 1.5 2.027317387 2.65801 0.01801 2.63439714 0.90% 表 2 单片样品损耗与磁轭损耗分析(取向样品)
Table 2. Analysis of sample loss and yoke loss (oriented electrical steel sample)
测试点 J (T) 总损耗 P (W) 比总损耗Ps (W/kg) 磁轭损耗PY (W/kg) 修正后的比总损耗 $P'_{\rm{s}} $ (W/kg) 磁轭引入的偏差 $\gamma $ 0.1 0.002055024 0.00426 0.00015 0.00394905 7.87% 0.2 0.00779076 0.01615 0.00052 0.01507206 7.15% 0.3 0.01683576 0.03490 0.00096 0.03290995 6.05% 0.4 0.029001888 0.06012 0.00146 0.05709347 5.30% 0.5 0.043985232 0.09118 0.00201 0.08701333 4.79% 0.6 0.061824384 0.12816 0.00256 0.12285320 4.32% 0.7 0.08251452 0.17105 0.00314 0.16454088 3.96% 0.8 0.10610388 0.21995 0.00375 0.21217637 3.66% 0.9 0.132761304 0.27521 0.00440 0.26608894 3.43% 1.0 0.162578448 0.33702 0.00507 0.32651005 3.22% 1.1 0.195743448 0.40577 0.00576 0.39382970 3.03% 1.2 0.232473384 0.48191 0.00650 0.46843570 2.88% 1.3 0.273043224 0.56601 0.00731 0.55085660 2.75% 1.4 0.318162096 0.65954 0.00810 0.64274896 2.61% 1.5 0.368370288 0.76362 0.00893 0.74510839 2.48% 1.6 0.428197536 0.88764 0.00983 0.86726272 2.35% 1.7 0.50811192 1.05330 0.01080 1.03091194 2.17% 表 3 单片磁导计的磁轭损耗的测量数据
Table 3. Measurement data of total yoke loss of single sheet tester
测试点
JY(mT) 磁导计A的磁轭
损耗 PYA (mW)磁导计B的磁轭
损耗 PYB (mW)磁导计C的磁轭
损耗 PYC (mW)5 3.75 3.61 3.81 10 11.46 11.12 11.04 15 23.02 22.54 21.93 20 38.43 37.85 36.63 25 58.03 57.16 54.66 30 81.52 80.19 76.30 35 108.67 106.84 101.44 40 140.43 137.54 130.12 45 175.75 171.45 162.32 50 215.42 209.40 198.50 表 4 单片磁导计A的磁轭损耗与拟合函数计算磁轭损耗分析
Table 4. Analysis of measured yoke loss and fitting function calculated yoke loss of single sheet tester A
样品测试
点 J (T)磁轭测试
点 JY (mT)实测磁轭损
耗PYA (mW) 拟合计算磁轭损
耗 $P'_{\rm{YA}} $ (mW)相对偏
差 (%)0.1 0.36 0.40 0.4339 −7.81 0.2 0.72 0.53 0.5769 −8.13 0.3 1.08 0.78 0.7407 5.31 0.4 1.44 0.88 0.9251 −4.88 0.5 1.8 1.10 1.1302 −2.67 0.6 2.16 1.34 1.3560 −1.18 0.7 2.52 1.56 1.6025 −2.65 0.8 2.88 1.88 1.8696 0.55 0.9 3.24 2.10 2.1575 −2.66 1.0 3.6 2.44 2.4660 −1.06 1.1 3.96 2.76 2.7952 −1.26 1.2 4.32 3.16 3.1451 0.47 1.3 4.68 3.48 3.5157 −1.02 1.4 5.04 3.83 3.9070 −1.97 1.5 5.4 4.36 4.3189 0.95 1.6 5.76 4.71 4.7516 −0.88 1.7 6.12 5.21 5.2049 0.10 -
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