小型变压器计算方法

1、小型变压器计算方法原公式：N= 4.5 %00000/BgX S（N二每伏匝数，S =铁心截面，Bg =铁芯导磁率，一般在600012000高斯）现今科学技术发达，铁芯在9000高斯以下的应是早期产品，现在一般都在10000 高斯附近或以上，按10000高斯计：N = 4.5 100000/10000 XS = 45/S1、先计算有效截面积S=长*宽*有效系数（0.94）2、求初级绕组匝数：N仁 U1/4.44fBSU1-额定初级电压f-频率B-磁感应强度，一般铁氧体的饱和磁感应强度Bm=0.5T。3、求次级绕组匝数N2=N1*U2/U1U2-额定次级电压4、求导线直径I2=S n/U2Sn-

2、额定容量I1=S n/U1导线直径d=V（ 4*l/pi*J ）J-电流密度，取J=2.5A/mm2以下页面为您提供了 1000KVA以下小功率变压器绕制数据，使您在自制小型变压器过程中基本不用进行复 杂的计算，供您方便、快捷地查找您所需的各种功率的变压器的资料。对于小型变压器的电流密度一般选用J=2-3平方毫米，变压器短时工作时可以取J=4 -5A平方毫米。变压器一次绕组绕制情况如下：变压器铁芯中柱外面套上由青壳纸做的绕组框架或弹性纸框架，包上电缆纸与 两层黄蜡布，厚度为 B0.。在框架外面每绕一层绕组后就得包上层间绝缘，其厚度为3。对于较细的导线，如0.2毫米以下的导线一般采用厚度为0.0

3、2-0.04 毫米透明纸（白玻璃纸）；对于较粗的导线如0.2毫米以上的导线，则采用厚度为0.05-0.07毫米的电缆纸（或牛皮纸）；对再粗的导线则可用厚度为0.12毫米的青壳纸（或牛皮纸）。当整个一次侧绕组绕完后，还需要在它的最外面裹上厚度为丫的绕组之间的绝缘纸，可用厚度为0.12毫米的青壳纸或2-3层电缆纸夹2层黄蜡布等。然后再绕次级。量VA一次侧电压 U1=220V铁芯 截面 积S（平 方厘 米）每伏需绕匝数（匝/伏）参考铁心尺寸（毫 米）电流（A）裸导线直径（毫 米）7000850010000中心柱 宽X叠厚AHChJ=2 （安 /mm2）J=2.5 （安/mm2）J=3 （安/mm2）

4、咼斯咼斯咼斯axb（毫米）30.01360.090.080.082.1831252212x21443882240.01820.110.090.092.4727221912x24443882250.02270.120.110.102.824201714x22504392560.2730.130.120.1083.05221815.516x225648102880.03630.150.1360.1253.5518.515.51316x2456481028100.04540.170.150.143.9517141216x2856481028120.05460.190.170.154.351512.7

5、1119x266757.51233.5150.06820.210.180.174.851411.59.619x3556481028160.07280.210.190.18513119.419x306757.51233.5200.09100.240.210.25.612108.419x346757.51233.5I220.100.250.230.215.8511.39.3822x30阿671439I250.11350.270.240.226.1510.58.77.419x376757.51233.5300.13650.290.260.246.859.586.822x3678671439330.1

6、50.310.270.257.159.27.66.519x436757.51233.5380.17250.330.300.277.658.676.022x4078671439400.1810.340.300.287.88.46.95.922x4178671439I420.1910.350.310.2888.26.75.726x3594811747I450.2640.360.320.298.37.86.55.522x4378671439500.2270.380.340.318.87.46.25.222x4678671439550.250.400.360.339.2575.9526x41|9481

7、1747600.2730.410.380.359.656.75.64.726x43|94811747700.3180.450.400.3610.036.35.24.430x39106911953760.3450.470.420.3810.08654.226x4894811747900.4090.510.460.4111.85.54.53.830x451069119531000.4540.530.480.4412.45.34.43.730x481069119531200.5460.590.530.4813.64.83.93.430x501069119531400.6360.630.570.521

8、4.74.53.73.135x48123105.52261.51600.7280.680.610.5615.54.13.42.935x50123105.52261.51850.8410.730.660.6016.73.83.22.735x35I123105.52261.52000.910.760.680.6217.73.73.12.635x58”23105.52261.52301.0450.830.730.67193.42.92.440x551441242672I2501.1350.860.770.6919.73.32.752.340x5714412426722801.2730.900.80.

9、7320.83.12.62.240x6014412426723201.4540.960.860.822.32.92.42.140x6414412426723801.7251.040.940.8624.52.72.21.945x63161138.52980.54201.911.100.980.9025.52.62.11.840x7314412426724502.0451.141.020.9326.52.52.051.7545x68161138.529|80.5518 2.351.231.101.0028.52.31.91.645x73”61138.52980.55752.611.291.161.0429.82.21.81.5545x76161138.52980.56002.721.331.181.0830.52.151.751.550x7017815332897003.181.431.301.1632.82.01.631.450x7517815332897813.551.501.351.2234.51.851.551.350