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变压器磁芯(功率表)

变压器磁芯(功率表)
变压器磁芯(功率表)

Ferrite EI, EE, EER, ETD, PQ, LP, RM, EPC Series For Switching Power Supplies

Technical Data

EI Cores (EI12.5 to EI60)

EE Cores (EE10/11 to EE62.3/62/6)

EER Cores (EER25.5 to EER42/42/20)

ETD Cores (ETD19 to ETD49)

PQ Cores (PQ20/16 to PQ50/50)

LP Cores (LP23/8 to LP32/13)

RM Cores (RM4 to RM14)

EPC Cores (EPC13 to EPC30)

For Switching Power Supplies Technical Data

JIS FEI 12.5

? Coil: ?0.2 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI12.5 gapped core (Typical)

PC40EI12.5 core (Typical)

EI12.5 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI12.5-Z

1200±25% (1kHz, 0.5mA)?2120 min. (100kHz, 200mT)

0.12 max.

8.8W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.2 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 16

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI16 gapped core (Typical)

PC40EI16 core (Typical)

EI16 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI16-Z

1100±25% (1kHz, 0.5mA)?1750 min. (100kHz, 200mT)

0.31 max.

29W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI19 gapped core (Typical)

PC40EI19 core (Typical)

EI19 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI19-Z

1400±25% (1kHz, 0.5mA)?1930 min. (100kHz, 200mT)

0.42 max.

40W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI22 gapped core (Typical)

PC40EI22 core (Typical)

EI22 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI22-Z

2400±25% (1kHz, 0.5mA)?3360 min. (100kHz, 200mT)

0.60 max.

33W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

Ferrite

EI Series EI22/19/6 Cores For Switching Power Supplies Technical Data

JIS FEI 22

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI22/19/6 gapped core (Typical)

PC40EI22/19/6 core (Typical)

EI22/19/6 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI22/19/6-Z

2000±25% (1kHz, 0.5mA)?2780 min. (100kHz, 200mT)

0.64 max.

48W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI25 gapped core (Typical)

PC40EI25 core (Typical)

EI25 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI25-Z

2140±25% (1kHz, 0.5mA)?2950 min. (100kHz, 200mT)

0.79 max.

68W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 28

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI28 gapped core (Typical)

PC40EI28 core (Typical)

EI28 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI28-Z

4300±25% (1kHz, 0.5mA)?6060 min. (100kHz, 200mT)

1.65 max.

107W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 30

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI30 gapped core (Typical)

PC40EI30 core (Typical)

EI30 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI30-Z

4690±25% (1kHz, 0.5mA)?6500 min. (100kHz, 200mT)

3.1 max.

155W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

Ferrite

EI Series EI33/29/13 Cores

For Switching Power Supplies Technical Data

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI33/29/13 gapped core (Typical)

PC40EI33/29/13 core (Typical)

EI33/29/13 core (Typical)

Part No.

A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI33/29/13-Z

4400±25% (1kHz, 0.5mA)?

5980 min. (100kHz, 200mT)

3.5 max.

206W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 35

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI35 gapped core (Typical)

PC40EI35 core (Typical)

EI35 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI35-Z

3800±25% (1kHz, 0.5mA)?5110 min. (100kHz, 200mT)

2.85 max.

218W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 40

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI40 gapped core (Typical)

PC40EI40 core (Typical)

EI40 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI40-Z

4860±25% (1kHz, 0.5mA)?6520 min. (100kHz, 200mT)

4.8 max.

348W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 50

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI50 gapped core (Typical)

PC40EI50 core (Typical)

EI50 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI50-Z

6110±25% (1kHz, 0.5mA)?8300 min. (100kHz, 200mT)

9.2 max.

508W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

JIS FEI 60

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EI60 gapped core (Typical)

PC40EI60 core (Typical)

EI60 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EI60-Z

5670±25% (1kHz, 0.5mA)?7690 min. (100kHz, 200mT)

12.5 max.

618W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

Ferrite

EE Series EE10/11 Cores For Switching Power Supplies Technical Data

JIS FEE 10.2

? Coil: ?0.18 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EE10/11 gapped core (Typical)

PC40EE10/11 core (Typical)

EE10/11 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EE10/11-Z

850±25% (1kHz, 0.5mA)?1450 min. (100kHz, 200mT)

0.14 max.

9.4W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.18 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

? Coil: ?0.18 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EE13 gapped core (Typical)

PC40EE13 core (Typical)

EE13 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EE13-Z

1130±25% (1kHz, 0.5mA)?1770 min. (100kHz, 200mT)

0.235 max.

17W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.18 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40SEE16 gapped core (Typical)

PC40SEE16 core (Typical)

SEE16 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40SEE16-Z

1240±25% (1kHz, 0.5mA)?1850 min. (100kHz, 200mT)

0.37 max.

32W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

DIN 41295

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EE20/20/5 gapped core (Typical)

PC40EE20/20/5 core (Typical)

EE20/20/5 core (Typical)

Part No.

A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EE20/20/5-Z

1400±25% (1kHz, 0.5mA)?2270 min. (100kHz, 200mT)

0.51 max.

41W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

? Coil: ?0.23 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EE25/19 gapped core (Typical)

PC40EE25/19 core (Typical)

EE25/19 core (Typical)

Part No.A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EE25/19-Z

2000±25% (1kHz, 0.5mA)?2570 min. (100kHz, 200mT)

0.86 max.

70W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.23 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

For Switching Power Supplies Technical Data

DIN 41295

? Coil: ?0.35 2UEW 100Ts

NI limit vs. A L -value for

A L -value vs. Air gap length for Temperature rise vs. Total loss for PC40EE30/30/7 gapped core (Typical)

PC40EE30/30/7 core (Typical)

EE30/30/7 core (Typical)

Part No.

A L -value (nH/N 2)

Calculated output power (forward converter mode)100kHz, 200mT PC40EE30/30/7-Z

2100±25% (1kHz, 0.5mA)?3030 min. (100kHz, 200mT)

1.51 max.

133W (100kHz)

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its extended linear part.

Measuring conditions ? Coil: ?0.35 2UEW 100Ts

? Frequency: 1kHz ? Level: 0.5mA

Note: The temperature rise is measured in the

room whose temperature and humidity are fixed to 25°C and 45(%)RH. respectively. (approx. 400×300×300cm)

磁芯参数对照表

Dimensions (mm) Ap Ae Aw A L Le Ve Wt P CL 100kHz 200mT Pt(100kH z) A * B * C ( cm 4 ) ( mm 2 )( mm 2 )( nH/N 2 ) ( mm ) ( mm 3 ) ( g ) @100℃(W)(Watts)幅寬PIN 形狀EC353C8535.3*17.3*9.5 1.374184.30163.002100.0077.406530.0038.00 21.58H EC413C8541.6*19.5*11.6 2.5894121.00214.002700.0089.3010800.0060.0024.58H EC523C8552.2*24.2*13.4 5.5980180.00311.003600.00105.0018800.00112.0028.312H EC703C8571.7*34.5*16.417.8281279.00639.003900.00144.00 40100.00254.0041.412/34H EE05PC40 5.25*2.65*1.950.0013 2.63 5.00285.0012.6033.100.160.02 1.1 2.76-8H EE6.3PC40 6.1*2.85*7.950.0015 3.31 4.46405.0012.2040.400.240.02 2.76H EE8PC408.3*4.0*3.60.00917.0013.05590.0019.47139.000.700.06 1.9 4.786H EE10/11PC4010.2* 5.5*4.750.028712.1023.70850.002 6.60302.00 1.500.16 6.68V EE13PC4013.0*6.0*6.150.05701 7.1033.351130.0030.20517.00 2.700.2357.410V EE16PC4016*7.2*4.80.076519.2039.851140.0035.00672.00 3.300.31 8.56-10V H EE19PC401 9.1*7.95*5.00.124323.0054.041250.0039.40900.00 4.800.4296-8V H EE19/16PC4019.29*8.1*4.750.119122.4053.151350.0039.10882.00 4.800.4196-8V H EE20/20/5PC4020.15*10*5.10.157231.0050.701460.0043.001340.007.500.51EE22PC4022*9.35*5.750.159041.0038.792180.0039.401610.008.800.618.45 8 V EE2329S PC4023*14.7*60.436835.80122.001250.0064.902320.0012.00 1.16EE25/19PC4025.4*9.46*6.290.312840.0078.202000.0048.701940.009.100.9EE25.4PC4025.4*9.66*6.350.317340.3078.732000.0048.701963.0010.000.9EE2825PC4028*12.75*10.60.852586.9098.103300.0057.705010.0026.00 2.519.610V EE30PC4030*13.15*10.70.7995109.0073.354690.0057.706310.0032.00 2.913.710-12V EE30/30/7PC4030.1*15*7.050.745559.70124.872100.0066.904000.0022.00 1.51EE3528PC4034.6*14.3*9.3 1.339884.80158.002600.0069.705910.0029.00 2.9615.712V EE40PC4040*17*10.7 2.2000127.00173.234150.0077.009810.0050.00 4.217.3 12 V EE4133PC4041.5*17*12.7 2.8260157.00180.004200.0079.0012470.0064.00 6.25EE42/21/15PC4042*21.2*15 4.9484178.00278.003800.0097.9019510.0088.008.8EE42/21/20PC4042*21.2*20 6.4625235.00275.005000.0097.8023000.00116.0011.6EE47/39PC4047.12*19.63*15.62 4.7529242.00196.406660.0090.6021930.00108.009.7EE50PC4050*21.3*14.6 5.7343226.00253.736110.0095.8021600.00116.009.421.312V EE55/55/21PC4055.15*27.5*20.713.6764354.00386.347100.00123.0043700.00234.0011.0(150MT)EE57/47PC4056.57*23.6*18.89.7132344.00282.368530.00102.0035100.00190.008.5EE60PC4060*22.3*15.69.8558247.00399.025670.00110.0027100.00135.0012.523.812V EE50.3PC4050.3*25.6*6.1 1.8447120.85152.642900.00104.9012676.0068.00 5.8328.2512H EE62.3/62/6PC4062.3*31*6.1 3.0330153.01198.223100.00125.7419240.00102.008.8533.85 12 H EE65/32/27 PC40 65.15*32.5*27 30.7625 535.00 575.008000.00147.00 78700.00 399.00 5.9(100MT) TYPE EC CORE TYPE EE CORE TYPE MATERIAL 可配合BOBBIN CORE參數對照表

磁芯参数参看

z变压器基础知识 1、变压器组成: 原边(初级primary side ) 绕组 副边绕组(次级secondary side ) 原边电感(励磁电感)‐‐magnetizing inductance 漏感‐‐‐leakage inductance 副边开路或者短路测量原边 电感分别得励磁电感和漏感 匝数比:K=Np/Ns=V1/V2 2、变压器的构成以及作用: 1)电气隔离 2)储能 3)变压 4)变流 ●高频变压器设计程序: 1.磁芯材料 2.磁芯结构 3.磁芯参数 4.线圈参数 5.组装结构 6.温升校核 1.磁芯材料 软磁铁氧体由于自身的特点在开关电源中应用很广泛。 其优点是电阻率高、交流涡流损耗小,价格便宜,易加 工成各种形状的磁芯。缺点是工作磁通密度低,磁导率 不高,磁致伸缩大,对温度变化比较敏感。选择哪一类 软磁铁氧体材料更能全面满足高频变压器的设计要求, 进行认真考虑,才可以使设计出来的变压器达到比较理 想的性能价格比。 2.磁芯结构 选择磁芯结构时考虑的因数有:降低漏磁和漏感, 增加线圈散热面积,有利于屏蔽,线圈绕线容易,装配 接线方便等。 漏磁和漏感与磁芯结构有直接关系。如果磁芯不需 要气隙,则尽可能采用封闭的环形和方框型结构磁芯。 3.磁芯参数: 磁芯参数设计中,要特别注意工作磁通密度不只是受磁化曲线限制,还要受损耗的限制,同时还与功率传送的工作方式有关。 磁通单方向变化时:ΔB=Bs‐Br,既受饱和磁通密度限制,又更主要是受损耗限制,(损耗引起温升,温升又会影响磁通密度)。工作磁通密度Bm=0.6~0.7ΔB 开气隙可以降低Br,以增大磁通密度变化值ΔB,开气隙后,励磁电流有所增加,但是可以减小磁芯体积。对于磁通双向工作而言: 最大的工作磁通密度Bm,ΔB=2Bm。在双方向变化工作模式时,还要注意由于各种原因造成励磁的正负变化的伏秒面积不相等,而出现直流偏磁问题。可以在磁芯中加一个小气隙,或者在电路设计时加隔直流电容。 4.线圈参数: 线圈参数包括:匝数,导线截面(直径),导线形式,绕组排列和绝缘安排。 导线截面(直径)决定于绕组的电流密度。通常取J为2.5~4A/mm2。导线直径的选择还要考虑趋肤效应。如必要,还要经过变压器温升校核后进行必要的调整。 4.线圈参数: 一般用的绕组排列方式:原绕组靠近磁芯,副绕组反馈绕组逐渐向外排列。下面推荐两种绕组排列形式: 1)如果原绕组电压高(例如220V),副绕组电压低,可以采用副绕组靠近磁芯,接着绕反馈绕组,原绕组在最外层的绕组排列形式,这样有利于原绕组对磁芯的绝缘安排; 2)如果要增加原副绕组之间的耦合,可以采用一半原绕组靠近磁芯,接着绕反馈绕组和副绕组,最外层再绕一半原绕组的排列形式,这样有利于减小漏感。 5.组装结构:

拓扑磁芯功率速查表

几种常用铁氧磁心在正激变换器托扑的最大输出功率速查表 各频率下的最大输出功率 磁心型号Ae,cm2 Ab,cm2 AeAb,cm420kHz 24kHz 48kHz 72kHz 96kHz 150kHz 200kHz 250kHz 300kHz 体积Cm3 EE Cores,Ferroxcube-Philips 814E250 0.202 0.171 0.035 1.1 1.3 2.7 4.0 5.3 8.3 11.1 13.8 16.6 0.57 813E187 0.225 0.329 0.074 2.4 2.8 5.7 8.5 11.4 17.8 23.7 29.6 35.5 0.89 813E343 0.412 0.359 0.148 4.7 5.7 11.4 17.0 22.7 35.5 47.3 59.2 71.0 1.64 812E250 0.395 0.581 0.229 7.3 8.8 17.6 26.4 35.3 55.1 73.4 91.8 110.2 1.93 782E272 0.577 0.968 0.559 17.9 21.4 42.9 64.3 85.8 134.0 178.7 223.4 268.1 3.79 E375 0.810 1.149 0.931 29.8 35.7 71.5 107.2 143.0 223.4 297.8 372.3 446.7 5.64 E21 1.490 1.213 1.807 57.8 69.4 138.8 208.2 227.6 433.8 578.4 722.9 867.5 11.5 783E608 1.810 1.781 3.224 103.2 123.8 247.6 371.4 495.1 773.7 1031.6 1289.4 1547.3 17.80 783E776 2.330 1.810 4.217 135.0 161.9 323.9 458.8 647.8 1012.2 1349.5 1686.9 2024.3 22.9 E625 2.340 1.370 3.206 102.6 123.1 246.2 369.3 492.4 769.4 1025.9 1282.3 1538.8 20.80 E55 3.530 2.800 9.884 316.3 379.5 759.1 1138.6 1518.2 2372.2 3162.9 3953.6 4744.3 43.50 E75 3.380 2.160 7.301 233.6 280.4 560.7 841.1 1121.4 1752.2 2336.3 2920.3 3504.4 36.00 EC Cores, ,Ferroxcube-Philips Ec35 0.843 0.968 0.816 26.1 31.3 62.9 94.0 125.3 195.8 261.1 326.4 391.7 6.53 Ec41 1.210 1.350 1.643 52.3 62.7 125.5 188.2 250.9 392.0 522.7 653.4 784.1 10.80 Ec52 1.800 2.130 3.834 122.7 147.2 294.5 441.7 588.9 920.2 1226.9 1533.6 1840.3 18.80 Ec70 2.790 4.770 13.208 425.9 511.0 1022.1 1533.1 2044.2 3194.0 4258.7 5323.3 6388.0 40.10 ETD Cores,Ferroxcube-philips ETD29 0.760 0.903 0.686 22.0 26.4 52.7 79.1 105.4 164.7 219.6 274.5 329.4 5.50 ETD34 0.971 1.220 1.185 37.9 45.5 91.0 136.5 182.0 284.3 379.1 473.8 568.6 7.64 ETD39 1.250 1.740 2.175 69.6 83.5 167.0 250.6 334.1 522.0 696..0 870.0 1044.0 11.50 ETD44 1.740 2.130 3.706 118.6 142.3 284.6 427.0 569.3 889.5 1186.0 1482.5 1779.0 18.00 ETD49 2.110 2.710 5.718 183.0 219.6 439.2 658.7 878.3 1372.3 1829.8 2287.2 2744.7 24.20 Pot Cores,Ferroxcube-philips 704 0.070 0.022 0.002 0.0 0.1 0.1 0.2 0.2 0.4 0.5 0.6 0.7 0.07 905 0.101 0.034 0.003 0.1 0.1 0.3 0.4 0.5 0.8 1.1 1.4 1.6 0.13

铁氧体磁芯功率与频率的关系表

表10-15正激变换器拓扑最大可能输出功率 输出功率(W) 磁芯A e(cm2) A w(cm2) A e A w(cm4) 20kHz 24kHz 48kHz 72kHz 96kHz 150kHz 200kHz 250kHz 300kHz 体积(cm3) E型磁芯 Philips 814E250 0.202 0.171 0.035 1.1 1.3 2.7 4.0 5.3 8.3 11.1 13.8 16.6 0.57 813E187 0.225 0.329 0.074 2.4 2.8 5.7 8.5 11.4 17.8 23.7 29.6 35.5 0.89 813E343 0.412 0.359 0.148 4.7 5.7 11.4 17.0 22.7 35.5 47.3 59.2 71.0 1.64 812E250 0.395 0.581 0.229 7.3 8.8 17.6 26.4 35.3 55.1 73.4 91.8 110.2 1.93 782E272 0.577 0.968 0.559 17.9 21.4 42.9 64.3 85.8 134.0 178.7 223.4 268.1 3.79 E375 0.810 1.149 0.931 29.8 35.7 71.5 107.2 143.0 223.4 297.8 372.3 446.7 5.64 E21 1.490 1.213 1.807 57.8 69.4 138.8 208.2 277.6 433.8 578.4 722.9 867.5 11.50 783E608 1.810 1.781 3.224 103.2 123.8 247.6 371.4 495.1 733.7 1031.6 1289.4 1547.3 17.80 783E776 2.330 1.810 4.217 135.0 161.9 323.9 485.8 647.8 1012.2 1349.5 1686.9 2024.3 22.90 E625 2.340 1.370 3.206 102.6 123.1 246.2 369.3 492.4 769.4 1025.9 1282.3 1538.8 20.80 E55 3.530 2.800 9.884 316.3 379.5 759.1 1138.6 1518.2 2372.2 3162.9 3953.6 4744.3 43.50 E75 3.380 2.160 7.301 233.6 280.4 560.7 841.1 1121.4 1752.2 2336.3 2920.3 3504.4 36.00 EC型磁芯 Philips EC35 0.843 0.968 0.816 26.1 31.3 62.7 94.0 125.3 195.8 261.1 326.4 391.7 6.53 EC41 1.210 1.350 1.634 52.3 62.7 125.5 188.2 250.9 392.0 522.7 653.4 784.1 10.80 EC52 1.800 2.130 3.834 122.7 147.2 294.5 441.7 588.9 920.2 1226.9 1533.6 1840.3 18.80 EC70 2.790 4.770 13.308 425.9 511.0 1022.1 1533.1 2044.2 3194.0 4258.7 5323.3 6388.0 41.10 ETD型磁芯 Philips ETD29 0.760 0.903 0.686 22.0 26.4 52.7 79.1 105.4 164.7 219.6 274.5 329.4 5.50 ETD34 0.971 1.220 1.185 37.9 45.5 91.0 136.5 182.0 284.3 379.1 473.8 568.6 7.64 ETD39 1.250 1.740 2.175 69.6 83.5 167.0 250.6 334.1 522.0 696.0 870.0 1044.0 11.50 ETD44 1.740 2.130 3.706 118.6 142.3 284.6 427.0 569.3 889.0 1186.0 1482.5 1779.0 18.00 ETD49 2.110 2.710 5.718 183.0 219.6 439.2 658.7 878.3 1372.3 1829.8 2287.2 2744.7 24.20 152

磁芯参数表

常用磁芯参数表 【EER磁芯】 ■ 用途:高频开关电源变压器、匹配变压器、扼流变压器等。 【EE磁芯】 ■ 用途:电源转换用变压器及扼流圈、通讯及其他电子设备变压器、滤波器、电感器及扼流圈、脉冲变压器等。

【ETD磁芯】 ■ 用途:电源转换用变压器及扼流圈、通讯及其他电子设备变压器、滤波器。 【EI 磁芯】 ■ 用途:高频开关电源变压器、功率变压器、整流变压器、电压互感器等。 【ET 磁芯】 ■ 用途:滤波变压器 【EFD 磁芯】 ■ 用途:高频开关电源变压器器、整流变压器、开关变压器等。

【UF 磁芯】 ■ 用途:整流变压器、脉冲变压器、扼流变压器、电源变压器等。 【PQ 磁芯】 ■ 用途高频开关电源变压器、整流变压器等。 【RM 磁芯】 ■ 用途:高频开关电源变压器、整流变压器、屏蔽变压器、脉冲变压器、脉冲功率变压器、扼流变压器、滤波变压器。 【EP 磁芯】 ■ 用途:功率变压器、宽频变压器、屏蔽变压器、脉冲变压器等。

【H 磁芯】 ■ 用途:宽带变压器、脉冲变压器、脉冲功率变压器、隔离变压器、滤波变压器、扼流变压器、匹配变压器等。 软磁铁氧体磁芯形状与尺寸标准(一) 软磁铁氧体磁芯形状 软磁铁氧体是软磁铁氧体材料和软磁铁氧体磁芯的总称。软磁铁氧体磁芯是用软磁铁氧体材料制成的元件或零件,或是由软磁铁氧体材料根据不同形式组成的磁路。磁芯的形状基本上由成型(形)模具决定,而成型(形)模具又根据磁芯的形状进行设计与制造。 磁芯按磁力线的路径大致可分两大类;磁芯按具体形状分,有各种各样: 磁芯按磁力线路径分类 磁芯按使用时磁化过程所产生磁力线的路径可分为开路磁芯和闭路磁芯两类。 第一类为开路磁芯。这类磁芯的磁路是开启的(open magnetic circuits),通过磁芯的磁通同时要通过周围空间(气隙)才能形成闭合磁路。开路磁芯的气隙占磁路总长度的相当部分,磁阻很大,磁路中的部分磁通在达到气隙以前就已离开磁芯形成漏磁通。因而,开路磁芯在磁路各个截面上的磁通不相等,这是开路磁芯的特点。由于开路磁芯存在大的气隙,磁路受到退磁场作用,使磁芯的有效磁导率μe比材料的磁导率μi有所降低,降低的程度决定于磁芯的几何形状及尺寸。 开路磁芯有棒形、螺纹形、管形、片形、轴向引线磁芯等等。IEC 1332《软磁铁氧体材料分类》标准中称开路磁芯为OP类磁芯。 第二类磁芯为闭路磁芯。这类磁芯的磁路是闭合的(closed magnetic circuits),或基本上是闭合的。IEC 1332称闭路磁芯为CL类磁芯。磁路完全闭合的磁芯最典型的是环形磁芯。此外,还有双孔磁芯、多孔磁芯等等。

几种常用磁性器件中磁芯的选用及设计

几种常用磁性器件中磁芯的选用及设计 开关电源中使用的磁性器件较多,其中常用的软磁器件有:作为开关电源核心器件的主变压器(高频功率变压器)、共模扼流圈、高频磁放大器、滤波阻流圈、尖峰信号抑制器等。不同的器件对材料的性能要求各不相同,如表所示为各种不同器件对磁性材料的性能要求。 (一)、高频功率变压器 变压器铁芯的大小取决于输出功率和温升等。变压器的设计公式如下: P=KfNBSI×10-6T=hcPc+h W P W 其中,P为电功率;K为与波形有关的系数;f为频率;N为匝数;S为铁芯面积;B为工作磁感;I为电流;T为温升;P c为铁损;P W为铜损;h c和h W为由实验确定的系数。 由以上公式可以看出:高的工作磁感B可以得到大的输出功率或减少体积重量。但B值的增加受到材料的Bs值的限制。而频率f可以提高几个数量级,从而有可能使体积重量显著减小。而低的铁芯损耗可以降低温升,温升反过来又影响使用频率和工作磁感的选取。一般来说,开关电源对材料的主要要求是:尽量低的高频损耗、足够高的饱和磁感、高的磁导率、足够高的居里温度和好的温度稳定性,有些用途要求较高的矩形比,对应力等不敏感、稳定性好,价格低。单端式变压器因为铁芯工作在磁滞回线的第一象限,对材料磁性的要求有别于前述主变压器。它实际上是一只单端脉冲变压器,因而要求具有大的B=Bm-Br,即磁感

Bm和剩磁Br之差要大;同时要求高的脉冲磁导率。特别是对于单端反激式开关主变压器,或称储能变压器,要考虑储能要求。 线圈储能的多少取决于两个因素:一个是材料的工作磁感Bm值或电感量L,另一个是工作磁场Hm或工作电流I,储能W=1/2LI2。这就要求材料有足够高的Bs值和合适的磁导率,常为宽恒导磁材料。对于工作在±Bm之间的变压器来说,要求其磁滞回线的面积,特别是在高频下的回线面积要小,同时为降低空载损耗、减小励磁电流,应有高磁导率,最合适的为封闭式环形铁芯,其磁滞回线见图所示,这种铁芯用于双端或全桥式工作状态的器件中。 通常,金属晶态材料要降低高频下的铁损是不容易的,而对于非晶合金来说,它们由于不存在磁晶各向异性、金属夹杂物和晶界等,此外它不存在长程有序的原子排列,其电阻率比一般的晶态合金高2-3倍,加之快冷方法一次形成厚度15-30微米的非晶薄带,特别适用于高频功率输出变压器。已广泛应用于逆变弧焊电源、单端脉冲变压器、高频加热电源、不停电电源、功率变压器、通讯电源、开关电源变压器和高能加速器等铁芯,在频率20-50kHz、功率50kW以下,是变压器最佳磁芯材料。 近年来发展起来的新型逆变弧焊电源单端脉冲变压器,具有高频大功率的特点,因此要

变压器设计及磁芯相关资料

磁性器件中磁芯的选用及设计 开关电源中使用的磁性器件较多,其中常用的软磁器件有:作为开关电源核心器件的主变压器(高频功率变压器)、共模扼流圈、高频磁放大器、滤波阻流圈、尖峰信号抑制器等。不同的器件对材料的性能要求各不相同,如表所示为各种不同器件对磁性材料的性能要求。 (一)、高频功率变压器 变压器铁芯的大小取决于输出功率和温升等。变压器的设计公式如下: P=K*f*N*B*S*I×10-6T=hc*Pc+hW*PW 其中,P为电功率;K为与波形有关的系数;f为频率;N为匝数;S为铁芯面积;B为工作磁感;I为电流;T为温升;Pc为铁损;PW为铜损;hc和hW为由实验确定的系数。 由以上公式可以看出:高的工作磁感B可以得到大的输出功率或减少体积重量。但B值的增加受到材料的Bs值的限制。而频率f可以提高几个数量级,从而有可能使体积重量显著减小。而低的铁芯损耗可以降低温升,温升反过来又影响使用频率和工作磁感的选取。一般来说,开关电源对材料的主要要求是:尽量低的高频损耗、足够高的饱和磁感、高的磁导率、足够高的居里温度和好的温度稳定性,有些用途要求较高的矩形比,对应力等不敏感、稳定性好,价格低。单端式变压器因为铁芯工作在磁滞回线的第一象限,对材料磁性的要求有别于前述主变压器。它实际上是一只单端脉冲变压器,因而要求具有大的B=Bm-Br,即磁感Bm和剩磁Br之差要大;同时要求高的脉冲磁导率。特别是对于单端反激式开关主变压器,或称储能变压器,要考虑储能要求。 线圈储能的多少取决于两个因素:一个是材料的工作磁感Bm值或电感量L,另一个是工作磁场Hm或工作电流I,储能W=1/2LI2。这就要求材料有足够高的Bs值和合适的磁导率,常为宽恒导磁材料。对于工作在±Bm 之间的变压器来说,要求其磁滞回线的面积,特别是在高频下的回线面积要小,同时为降低空载损耗、减小励磁电流,应有高磁导率,最合适的为封闭式环形铁芯,其磁滞回线见图所示,这种铁芯用于双端或全桥式工作状态的器件中。 通常,金属晶态材料要降低高频下的铁损是不容易的,而对于非晶合金来说,它们由于不存在磁晶各向异性、金属夹杂物和晶界等,此外它不存在长程有序的原子排列,其电阻率比一般的晶态合金高2-3倍,加之快冷方法一次形成厚度15-30微米的非晶薄带,特别适用于高频功率输出变压器。已广泛应用于逆变弧焊电源、单端脉冲变压器、高频加热电源、不停电电源、功率变压器、通讯电源、开关电源变压器和高能加速器等铁芯,在频率20-50kHz、功率50kW以下,是变压器最佳磁芯材料。

磁芯选择指南

磁芯选择指南 来源:网络更新时间:2009-12-14点击数: 1

高频变压器设计时选择磁芯的两种方法 来源:网络 更新时间:2008-11-5 8:06:32 点击数: 42 在高频变压器设计时,首先遇到的问题,便是选择能够满闵杓埔蠛褪褂靡蟮拇判尽?lt;BR> 通常可以采取下面介绍的两种方法:面积乘积法和几何尺寸参数法。这两种方法的区别在于:面积乘积法是把导线的电流密度作为设计参数,几何尺寸参数法则是把绕组线圈的损耗,即铜损作为设计参数。 1 面积乘积法 这里讲的面积乘积。是指磁芯的可绕线的窗口面积和磁芯的截面积,这两个面积的乘积。 表示形式为WaAe ,有些讲义和书本上简写为Ap ,单位为 。 根据法拉第定律,我们有: 窗口面积利用情况有: KWα=NAw 变压器有初级、次级两个绕组。因此有: KWα=2NAw 或

0.5KWα=NAw 我们知道: Aw= 而电流有效值 I=Ip 得到以下关系式:0.5KWα= 即: 于是就有如下式:

由于:EδIp=Pi 又有:Pi= 最后得到如下公式: 这个公式适用于单端变压器,如正激式和反激式。 δ<0.5,Bm-T,K-0.3~0.4,η-0.8~0.9,J-A/。推挽式的公式则为: 半桥式的公式则为: 这里的δ>0.5,例如0.8~0.9。 单端变压器如正激式和反激式:Bm=△B=Bs-Br。 双端变压器如推挽式、半桥式和桥式:Bm=2Bpk。 全桥式公式与推挽式相同,但δ>0.5,例如0.8~0.9。

在J=400A/,K=0.4,η=0.8,δ=0.4(单端变压器),δ=0.8(双端变压器)。公式简化如下: (单端变压器) (推挽式) (半桥式和桥式) 2 几何尺寸参数法 这个方法是把绕组线圈的损耗,即铜损作为设计参数。因此,公式正是由计算绕组线圈的铜损的公式演变而来的。 。变压器有两个绕组 这里为初级绕组电阻, 为次级绕组电阻。 由于

罐型磁芯

罐型磁芯 骨架和绕组几乎全部被磁芯包裹起来,致使它对EMI的屏蔽效果非常好;罐型磁芯尺寸均符合IEC标准,在制造的时候互换性非常好;可提供简单型骨架(无插针的)和P CB板安装骨架(有插针);由于罐型形状的设计,致使与其它类型同等尺寸的磁芯相比费用更高;由于它的形状不利于散热,因此不适于应用于大功率变压器电感器。 RM型磁芯 与罐型相比,切掉了罐型的两个对称的侧面,这重设计更有利于散热和大尺寸的引线引出;与罐形相比,节约了大约40%的安装的空间;骨架有无针型的和插针型的;可以采用一对夹子进行安装;RM型磁芯可以作成扁平形状(适合现在的平面变压器或者是直接把磁芯装配到已经设计好绕组的印制板电路上);虽然屏蔽效果不如罐型的好,但是仍然不错。 E型磁芯 与罐型磁芯相比,E型磁芯的费用要低的多,再加上绕制和组装都比较简单,这种磁芯形状现在应用最广,但是它的缺点是不能提供自我屏蔽;E型磁芯可以进行不同方向的安装,也可以几付叠加应用更大的功率;这种磁芯可以作成扁平形状(是现在平面变压器很流行的磁芯形状);也可以提供无针和插针型骨架;由于其散热非常好、可以叠加使用,一般大功率电感器和变压器都使用这种形状的磁芯。 EC、ETD和EER型磁芯 这些类型的磁心结构介于E型和罐型之间。和E型磁芯一样,他们能提供足够的空间供大截面的引线引出(适合现在开关电源低压大电流的趋势);这些形状的磁心散热也非常好;有于中心柱为圆柱形,与相同截面的长方体相比,单匝的绕组的长度缩短了11%,这样致使铜损也降低了11%,同时使的磁心能提供一个更高的输出功率;同时中心柱为圆柱形,与长方体中心柱相比,也避免了由于长方体棱角在绕制时破坏绕组线材绝缘的隐患。 PQ型磁心

磁芯的种类及应用

磁芯的种类及应用: 1.磁性材料的磁化曲线 磁性材料是由铁磁性物质或亚铁磁性物质组成的,在外加磁场H 作用下,必有相应的磁化强度M 或磁感应强度B,它们随磁场强度H 的变化曲线称为磁化曲线(M~H或B~H曲线)。磁化曲线一般来说是非线性的,具有2个特点:磁饱和现象及磁滞现象。即当磁场强度H足够大时,磁化强度M达到一个确定的饱和值Ms,继续增大H,Ms保持不变;以及当材料的M值达到饱和后,外磁场H降低为零时,M并不恢复为零,而是沿MsMr曲线变化。材料的工作状态相当于M~H曲线或B~H曲线上的某一点,该点常称为工作点。 2.软磁材料的常用磁性能参数 饱和磁感应强度Bs:其大小取决于材料的成分,它所对应的物理状态是材料内部的磁化矢量整齐排列。 剩余磁感应强度Br:是磁滞回线上的特征参数,H回到0时的B值。 矩形比:Br?Bs 矫顽力Hc:是表示材料磁化难易程度的量,取决于材料的成分及缺陷(杂质、应力等)。 磁导率μ:是磁滞回线上任何点所对应的B与H的比值,与器件工作状态密切相关。 初始磁导率μi、最大磁导率μm、微分磁导率μd、振幅磁导率μa、有效磁导率μe、脉冲磁导率μp。 居里温度Tc:铁磁物质的磁化强度随温度升高而下降,达到某一温度时,自发磁化消失,转变为顺磁性,该临界温度为居里温度。它确定了磁性器件工作的上限温度。 损耗P:磁滞损耗Ph及涡流损耗 Pe P = Ph + Pe = af + bf2+ c Pe ∝ f2 t2 / ,ρ降低,磁滞损耗Ph的方法是降低矫顽力Hc;降低涡流损耗Pe 的方法是减薄磁性材料的厚度t 及提高材料的电阻率ρ。在自由静止空气中磁芯的损耗与磁芯的温升关系为: 总功率耗散(mW)/表面积(cm2) 3.软磁材料的磁性参数与器件的电气参数之间的转换 在设计软磁器件时,首先要根据电路的要求确定器件的电压~电流特性。器件的电压~电流特性与磁芯的几何形状及磁化状态密切相关。设计者必须熟悉材料的磁化过程并拿握材料的磁性参数与器件电气参数的转换关系。设计软磁器件通常包括三个步骤:正确选用磁性材料;合理确定磁芯的几何形状及尺寸;根据磁性参数要求,模拟磁芯的工作状态得到相应的电气参数。 一、软磁材料的发展及种类 1. 软磁材料的发展 软磁材料在工业中的应用始于19世纪末。随着电力工及电讯技术的兴起,开始使用低碳钢制造电机和变压器,在电话线路中的电感线圈的磁芯中使用了细小的铁粉、氧化铁、细铁丝等。到20世纪初,研制出了硅钢片代替低碳钢,提高了变压器的效率,降低了损耗。直至现在硅钢片在电力工业用软磁材料中仍居首位。到20年代,无线电技术的兴起,促进了高导磁材料的发展,出现了坡莫合金及坡莫合金磁粉芯等。从40年代到60年代,是科学技术飞速发展的时期,雷达、电视广播、集成电路的发明等,对软磁材料的要求也更高,生产出了软磁合金薄带及软

高导磁芯、功率磁芯的区别

高导磁芯、功率磁芯的区别 功率磁芯和高导磁芯表象区别在于电感,高导就是磁导率高的意思,一般磁导率都有5K---10K,而功率磁芯的磁导率都在2K---3K之间. 实质上:功率磁芯注重的是功率传输过程中的功率损耗或发热现象,越好的功率磁芯如P4、的功率损耗就越严格,否则就越差,高导材料注重的是电感值,尤其是电感在高频下的稳定性.第二,功率材料和高导材料还有一个很重要的区别:居里温度,一般P4的居里温度为240度,而高导的居里温度为130度左右. 通常情况下,材料磁导率越低,适用的频率范围越宽;材料磁导率越高,适用的频率范围越窄。 磁导率是磁阻的倒数,磁阻大了,磁导率就小了。 磁阻的倒数称作磁导。在SI制中,它的单位是亨利(H)。磁阻(magnetic reluctance)是指含有永磁体的磁路中的一个参量。源于磁路中存在漏磁。利用永磁体来产生一工作磁场时,需要有永磁体、高导磁软磁体和适当大小的空隙三部分,总称为磁路。永磁体提供磁通,经过软磁体连接后在空隙处产生磁场。磁路中的总磁通量是守恒的,但在空隙处的磁通密度相对降低,因有部分磁通在非空隙处流失,称之为漏磁,导致磁路中的磁阻。 磁导率μ等于磁介质中磁感应强度B的微分与磁场强度H的微分之比,即μ=dB / dH 通常使用的是磁介质的相对磁导率μr,其定义为磁导率μ与真空磁导率μ0之比,即μr=μ/μ0 相对磁导率μr与磁化率χ的关系是:μr=1+χ

磁导率μ,相对磁导率μr和磁化率χ都是描述磁介质磁性的物理量。 对于顺磁质μr>1;对于抗磁质μr<1,但两者的μr都与1相差无几。在大多数情况下,导体的相对磁导率等于1.在铁磁质中,B与H 的关系是非线性的磁滞回线,μr不是常量,与H有关,其数值远大于1。 例如,如果空气(非磁性材料)的相对磁导率是1,则铁氧体的相对磁导率为10,000,即当比较时,以通过磁性材料的磁通密度是10,000倍。铸铁为200~400;硅钢片为7000~10000;镍锌铁氧体为10~1000。

变压器各种规格尺寸

EE/EI型 磁芯外形:EE型、EI型 特点及应用范围:具有适用范围广,工作频率高,工作电压范围宽,输出功率大等.广泛应用于开关电源、 计算机、电子镇流器及家用电器等。 以下仅为例示尺寸,我公司可根据客户要求进行定制。 尺寸(mm) TYPE 序号针数 A B C±0.5D±0.5 E±0.5F EE-8.3 6 8 8 6 4 2.5 8.3 V EE-10 811.510.2 8 4 2.5 10.2 V EE-131012 12.5 8.5 4 2.5 13 V EE-16-1 614.813.3 9 4 3 16 V EE-16-21015.413 10.5 4 3.2 17.1 V EEL-161028.516 12.3 4 4.3 21.9 V EE-19-1 817.616 10 4 5 19 V EE-19-21017.216.213 4 3.9 20 V EEL-191031.516 10.5 4 4 21.1 V EEL-19-11015.630 24.1 4 3.5 21 H EE-25-1 620 18.212.5 4 6.3 25.2 V EE-25-2 821.717.512.6 4 5 25.2 V EE-25-31022.225 15.4 4 5 26.1 H EEL-25 835.317.512.5 4 5 25.2 V EE-301021 29.225.2 4 5 30 H EE-401427.630.525.8 4 5 40 H EE-42/15-11233.844 35.5 4 5 42 H EE-42/15-21641.348 37.7 4 5 42 H EE-42/15-31848.732 27.5 4 5 45.1 V EE-42/20-11245 39.832.5 4 5 42 V EE-42/20-21644.250 37.8 4 5 42.2 H EE-42/20-31844.137 27.3 4 5 45.3 V EE-552050 50 45.5 4 5 55 H

变压器参数表

±??1?÷參數對照表 Dimensions (mm) Ap Ae Aw A L Le Ve Wt P CL 100kHz 200mT Pt (100kHz)A * B * C ( cm 4 ) ( mm 2 )( mm 2 )( nH/N 2 ) ( mm ) ( mm 3 ) ( g ) @ 100℃ (W) ( Watts ) 幅寬PIN 形狀 TYPE EC CORE EC353C8535.3*17.3*9.5 1.374184.30163.002100.0077.406530.0038.0021.58H EC413C8541.6*19.5*11.6 2.5894121.00214.002700.0089.3010800.0060.0024.58H EC523C8552.2*24.2*1 3.4 5.5980180.00311.003600.00105.0018800.00112.0028.312H EC703C8571.7*3 4.5*16.417.8281279.00639.003900.00 144.0040100.00 254.0041.4 12/34 H TYPE ED CORE ED28TP428*10.4*12.10.723690.0080.4050.30 22.00ED28(TDG)TP428.4*9.8*30 1.6589192.0086.407000.0047.00 4.51110V ED29TP429.8*14.8*11.6 1.350090.00150.0029.50 TYPE EE CORE EE05PC40 5.25*2.65*1.950.0013 2.63 5.00285.0012.6033.100.160.02 1.1 2.76-8H EE6.3PC40 6.1*2.85*7.950.0015 3.31 4.46405.0012.2040.400.240.02 2.76H EE8PC408.3*4.0*3.60.00917.0013.05590.0019.47139.000.700.06 1.9 4.786H EE10/11PC4010.2* 5.5*4.750.028712.1023.70850.002 6.60302.00 1.500.16 6.68V EE13PC4013.0*6.0*6.150.05701 7.1033.351130.0030.20517.00 2.700.2357.410V EE16PC4016*7.2*4.80.076519.2039.851140.0035.00672.00 3.300.31 8.56-10V H EE19PC401 9.1*7.95*5.00.124323.0054.041250.0039.40900.00 4.800.4296-8V H EE19/16PC4019.29*8.1*4.750.119122.4053.151350.0039.10882.00 4.800.4196-8V H EE20/20/5PC4020.15*10*5.10.157231.0050.701460.0043.001340.007.500.51EE22PC4022*9.35*5.750.159041.0038.792180.0039.401610.008.800.618.45 8 V EE2329S PC4023*14.7*6 0.436835.80122.001250.0064.902320.0012.00 1.16EE25/19PC4025.4*9.46*6.290.312840.0078.202000.0048.701940.009.100.9EE25.4PC4025.4*9.66*6.350.317340.3078.732000.0048.701963.0010.000.9EE2825PC4028*12.75*10.60.852586.9098.103300.0057.705010.0026.00 2.519.610V EE30PC4030*13.15*10.70.7995109.0073.354690.0057.706310.0032.00 2.913.710-12V EE30/30/7PC4030.1*15*7.050.745559.70124.872100.0066.904000.0022.00 1.51EE3528PC4034.6*14.3*9.3 1.339884.80158.002600.0069.705910.0029.00 2.9615.712V EE40PC4040*17*10.7 2.2000127.00173.234150.0077.009810.0050.00 4.217.3 12 V EE4133PC4041.5*17*12.7 2.8260157.00180.004200.0079.0012470.0064.00 6.25EE42/21/15PC4042*21.2*15 4.9484178.00278.003800.0097.9019510.0088.008.8EE42/21/20PC4042*21.2*20 6.4625235.00275.005000.009 7.8023000.00116.0011.6EE47/39PC4047.12*19.63*15.62 4.7529242.00196.406660.0090.6021930.0010 8.00 9.7EE50PC4050*21.3*14.6 5.7343226.00253.736110.0095.8021600.00116.009.4 21.312V EE55/55/21PC4055.15*27.5*20.713.6764354.00386.347100.00123.0043700.00234.0011.0(150MT) EE57/47PC4056.57*23.6*18.89.7132344.00282.368530.00102.0035100.00190.008.5EE60PC4060*22.3*15.69.8558247.00399.025670.00110.0027100.00135.0012.523.812V EE50.3PC4050.3*25.6*6.1 1.8447120.85152.642900.00104.9012676.0068.00 5.8328.2512H EE62.3/62/6PC4062.3*31*6.1 3.0330153.01198.223100.00125.7419240.00102.008.8533.8512H EE65/32/27PC4065.15*32.5*2730.7625535.00575.008000.00147.0078700.00399.00 5.9(100MT) TYPE EF CORE EF12.6PC4012.7*6.4*3.60.031113.0023.90810.0029.60385.00 2.000.17 3.510V EF16PC4016.1*8.05*4.50.080020.1039.821100.0037.60754.00 3.900.32EF20PC4020*9.9*5.650.101333.5030.241570.0044.901500.007.400.69EF25PC4025.05*12.55*7.20.237651.8045.872000.0057.802990.0015.00 1.4EF32PC40 32.1*16.1*9.15 0.6515 83.20 78.30 2590.00 74.30 6180.00 32.00 2.9 TYPE MATERIAL 可配合BOBBIN

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