YUXIANG EER50 Eer cores. etd core Datasheet

EER42,ETD-core,EER-core,EER40,EER20,EER35,EER cores,EER28,EER30,EER34,EER43,EER45,EER50,ETD cores,
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EER CORES
ETD CORES
Description of the “E” patterns
The "E" patterns are sought that are easy to assemble, could be interleave to minimize gap effects, and would
minimize waste. Since “E” cores have two open coil sides, they provide substantial room to bring high current
lead wires out from the coil. It is easier to achieve high voltage electrical isolation with an “E” core. In the typical
“E” lamination, the center leg (one of three legs) is twice the width of either outer leg. In theory, magnetic flux
flowing out of the center leg divides equally and flows into the outer two "E" core legs. Since the outer legs
handle half the flux they only need to have half the cross-section that the center leg has. It is easier to achieve
high voltage electrical isolation with an “E” core than with a pot core.
Presentation of EER-core and ETD-core
EER-core and ETD-core are examples of type “E” cores with round center legs. The combined cross section of the
two outer legs of EER cores and ETD cores should equal or exceed that of the center leg. The core stack is a
stack of laminations and the typical stack has core legs of rectangular cross-section. Typically the inductor or
transformer coil is placed over the center core leg. To minimize winding resistance (hence also minimize winding
losses) it is desirable to have a round center leg. A round center leg also eliminates the sharp bend encountered
when winding wire around a rectangular leg; consequently a round center leg permits use of larger wire.
Achieving round center legs with laminations is possible but very impractical. With the development of powdered
cores and ferrite cores it became practical to have a round center leg. EER-core and ETD-core type, such as
EER42, EER40, EER20, EER35, EER28, EER30, EER34, EER43, EER45, EER50, etc, ferrite cores are developed for
higher power higher frequency switching transformers.
Application of EER-core and ETD-core
EER cores and ETD cores are usually larger, but have a wide winding area, which makes them particularly good
for higher power designs or multiple output designs. Remember a larger core size will be needed for a margin
wound type transformer than for a triple insulated type to allow room for the margins. EER cores with round
center leg offer ideal features for the design of SMPS transformers chokes. We offer various EER cores and ETD
cores, including EER42, EER40, EER20, EER35, EER28, EER30, EER34, EER43, EER45, EER50, EER49, EER25.5,
EER55, EER54, EER53, ETD29, ETD34, ETD39, ETD49, ETD44, ETD10, ETD41, ETD32, ETD59, ETD31, and
ETD22. Please find our details of ETD-core and EER-core by types and dimensions data shown as below.
EER25
EER28A
EER28B
ETD29
EER30
ETD34
EER35A
EER35/34B
EER35C
EER37
ETD39
EER40A
EER40B
EER40C
EER40D
A
25.3±0.6
28.5±0.6
28.5±0.6
29.8±0.8
30.0 ± 0.8
34.2 ± 0.8
35.0 ± 0.7
35.0 ± 0.7
36.0 ± 0.7
36.0 ± 0.6
39.1 ± 0.9
40.0 ± 0.8
44.0 ± 0.8
40.0± 0.7
40.2± 0.5
B
9.3±0.3
14.0 ± 0.3
16.9 ± 0.3
15.8 ± 0.2
17.5 ± 0.3
17.3 ± 0.2
21.0 ± 0.3
16.8 ± 0.3
21.6 ± 0.4
20.7 ± 0.3
19.8 ± 0.2
22.4 ± 0.3
22.4 ± 0.3
22.9 ± 0.3
21.4± 0.3
Dimensions(mm)
C
D
7.5 ± 0.3
7.5 ± 0.3
11.4 ± 0.3
9.9±0.3
11.4 ± 0.3
9.9 ± 0.3
9.5 ± 0.3
9.5 ± 0.3
11.2 ± 0.3
9.9 ± 0.3
10.8 ± 0.3
10.8 ± 0.3
11.3 ± 0.4
11.3 ± 0.3
11.3 ± 0.4
11.3 ± 0.3
11.3 ± 0.4
11.3 ± 0.4
11.3 ± 0.3
11.3 ± 0.3
12.6 ± 0.4
12.5 ± 0.3
13.3 ± 0.3
13.3 ± 0.3
13.3 ± 0.3
13.3 ± 0.3
13.3 ± 0.3
13.3 ± 0.3
15.5± 0.3
15.5± 0.3
E
19.8
21.2
21.2
22.0
22.5
25.6
25.3
25.3
26.5
27.6
29.3
29.0
29.3
29.5
29.4
F
6.2 ± 0.3
9.6±0.3
12.5 ± 0.3
11.0 ± 0.3
12.6 ± 0.3
12.1 ± 0.3
15.0 ± 0.3
10.8 ± 0.3
15.6 ± 0.4
14.7 ± 0.3
14.6 ± 0.4
15.4 ± 0.3
15.4 ± 0.3
15.9 ± 0.3
15.4± 0.3
EER40E
40.0 +0.6
23.0± 0.3
13.3± 0.3
13.3± 0.3
29.0
16.0± 0.3
EER40F
41.0max
22.8±0.3
13.3±0.4
13.3±0.3
29.5
15.8±0.3
EER40G
40.8 +0.1
21.3±0.2
15.0±0.2
14.0±0.25
30.7
15.3±0.2
EER40H
41.0±0.7
24.0 + 0.3
13.0 +0
13.0 +0
30.0
17.0 +0.3
EER49A
49.0 ±0.8
26.2 ±0.4
17.0 ±0.5
17.0 ±0.5
36.5
18.7 +0.3
EER49B
ETD49
EER50
49.0 ±1.0
49.0 ±1.0
50.5 ±0.8
27.0 ±0.3
24.7 ±0.3
27.0 ±0.3
17.2 ±0.4
16.3 ±0.4
18.7 ±0.4
17.2 ±0.3
16.3 ±0.4
18.7 ±0.4
36.5
36.1
38.0
18.7 ±0.3
18.1 ±0.4
18.7 ±0.3
EER53
53.2 ±0.8
23.2 ±0.3
21.5 ±0.3
20.0 +0.2
38.7
16.3 ±0.3
EER54
EER55A
EER55B
54.2 ±0.8
56.0 ±0.8
55.9 ±1.0
25.1 ±0.4
30.7 ±0.3
29.0 ±0.3
18.9 ±0.4
20.4 ±0.3
24.3 ±0.5
18.9 ±0.3
20.4 ±0.3
20.2 ±0.3
40.5
44.0
43.5
17.5±0.3
22.9±0.3
20.4±0.3
Type
-0.5
-0.5
-0
-0.3
-0.3
-0.3
-0
-0.2
CATALOG
EER42,ETD-core,EER-core,EER40,EER20,EER35,EER cores,EER28,EER30,EER34,EER43,EER45,EER50,ETD cores,
EER49A
49.0 ±0.8
26.2 ±0.4
17.0 ±0.5
17.0 ±0.5
36.5
18.7 +0.3
EER49B
ETD49
EER50
49.0 ±1.0
49.0 ±1.0
50.5 ±0.8
27.0 ±0.3
24.7 ±0.3
27.0 ±0.3
17.2 ±0.4
16.3 ±0.4
18.7 ±0.4
17.2 ±0.3
16.3 ±0.4
18.7 ±0.4
36.5
36.1
38.0
18.7 ±0.3
18.1 ±0.4
18.7 ±0.3
EER53
53.2 ±0.8
23.2 ±0.3
21.5 ±0.3
20.0 +0.2
38.7
16.3 ±0.3
EER54
EER55A
EER55B
54.2 ±0.8
56.0 ±0.8
55.9 ±1.0
25.1 ±0.4
30.7 ±0.3
29.0 ±0.3
18.9 ±0.4
20.4 ±0.3
24.3 ±0.5
18.9 ±0.3
20.4 ±0.3
20.2 ±0.3
40.5
44.0
43.5
17.5±0.3
22.9±0.3
20.4±0.3
Type
Core parameter
C1 (mm-1) Ae (mm2 ) Ie (mm) Ve (mm3 )
EER25
1.09
44.3
48.3
2140
EER28A
0.79
82.1
64
5254
EE28B
0.86
85.6
73.2
6266
ETD29
0.95
73.6
70.6
5196
EER30
0.99
85.5
75.4
6673
ETD34
0.81
97.1
78.6
7632
EER35A
0.84
107
90.8
9716
EER35/34B
0.68
107
72.8
7790
EER35C
0.84
107
90
9630
EER37
0.8
112.1
90.5
10149
ETD39
0.737
125
92.1
1151
EER40A
0.66
149
98
14602
EER40B
0.68
149
102
15198
EER40C
0.67
149
100
14900
EER40D
0.50
187.7
93.9
17415
EER40E
0.65
151
98.2
14828
EER40F
0.65
151
98.1
15215
EER40G
0.609
158
96.3
15230
EER40H
0.7
145
102.8
14906
EER42A
0.547
183
96.3
17623
EER42B
0.528
183.7
96.9
17800
EER42/C
0.5
155.3
97.5
15137
EER43A
0.5
194
98.0
19821
EER43B
0.5
194
96.8
19584
ETD44
0.59
173.0
103.0
17720
EER45
0.6
189.5
105.0
19894
EER49A
0.5
235.8
116.0
27357
EER49B
0.5
241
118
28460
ETD49
0.534
217.6
112.2
24417
EER50
0.437
277.5
117.6
32637
EER53
0.338
319.5
105.9
33828
EER54
1.0
594.1
48.7
28958.2
EER55A
0.62
303.1
188.2
41896.1
EER55B
0.36
353.8
128.7
45533
weight (g/pr.)
-0.3
-0.2
AL(nH/N2 )
F2B (±25%) F2BD (± 25%) F2B1 ( ±25%)
12
28
33
28
32
40
53
51
55
52.5
60
78
78
78
78
77
78
80
80
94
92
96
105
102
94
108
112
148
124
170
170
181
220
228
2100
3120
2100
2500
2800
2600
2960
3100
3100
2960
3240
/
/
/
3830
/
/
/
/
/
/
/
/
/
/
/
/
3500
3700
/
/
/
/
/
Copyright 2005 YUXIANG Magnetic Materials Ind. Co.,Ltd.All Rights Reserved.
Add:16F1,jinyuan building,NO.57,hubin S.Rd.,Xiamen,China.361004
Tel : (86)592 2225286 (86)592 2219816 (86)592 2217138 Fax: (86)592 2207122
Email : [email protected] [email protected]
2050
3080
2660
≥2100
2600
2450
2580
2770
2700
2580
2800
3500
3500
3400
3800
3300
3300
3600
3200
4500
4400
3500
4500
4500
4110
5000
6800
6500
3700
5730
6200
4800
7100
1920
2870
2520
2200
2500
2400
2600
2770
2700
2600
2700
3500
3500
3400
3300
3300
3300
3600
3200
4500
4400
3400
4500
4500
4000
4670
6250
6030
4400
5300
6200
4800
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