New standard range of NANOPERM® based LC-series nanocrystalline cores is developed specially for making small size common-mode chokes. Use of LC series cores as magnetic circuits of common-mode chokes gives a number of advantages as compared with a use of high-permeability ferrites.
Main advantages: Significant decrease of geometrical dimensions, of weight, higher range of operating temperatures and high stability of parameters. More detailed description of advantages see here.
Sizes of nanocrystalline core based chokes in comparison with ferrite based chokes:
Standard (Type – Size) Series
Standard (type – size) series of LC nanocrystalline cores issued by Magnetec Co.
| Type | Core’s dimensions od x id x h [mm] |
Dimensions in protective casing OD x ID x H [mm] |
Lfe [cm] | Afe [cm²] | Al @ 10kHz [μH] | Standard packing [pcs] |
| M-306 | 16 x 11 x 5 | 18,4 x 8,6 x 7,0 | 4,19 | 0,1 | 5,9 - 11,8 | 990 |
| M-307 | 20 x 15 x 5 | 22,4 x 12,6 x 7,5 | 5,46 | 0,1 | 4,5 - 9,1 | 675 |
| M-308 | 25 x 20 x 5 | 27,7 x 17,1 x 7,5 | 7,04 | 0,1 | 3,5 - 7,0 | 567 |
| M-309 | 30 x 25 x 5 | 32,7 x 22,0 x 7,5 | 8,62 | 0,1 | 2,8 - 5,7 | 315 |
| M-310 | 40 x 35 x 5 | 42,5 x 31,8 x 7,5 | 11,8 | 0,1 | 2,1 - 4,2 | 216 |
| M-333 | 50 x 45 x 5 | 52,2 x 41,8 x 7,5 | 14,9 | 0,1 | 1,6 - 3,3 | 135 |
| M-334 | 60 x 55 x 5 | 62,0 x 51,6 x 7,5 | 17,7 | 0,1 | 1,3 - 2,8 | 100 |
| M-335 | 70 x 65 x 5 | 72,0 x 61,4 x 7,5 | 20,9 | 0,1 | 1,1 - 2,3 | 80 |
Cores are issued in protective plastic casing (C-type).
Examples of Developed common-mode Chokes
The recommended development versions for common-moded chokes based on magnetic circuits made of LC series nanocrystalline cores are listed below.
| Operating Current* [A] | - | M-306 | M-307 | M-308 | M-309 | M-310 | M-333 | M-334 | M-335 |
| 2 | N: dcu [mm]: Lnom [mH]: |
50 0,4 2 x 22 |
79 0,5 2 x 40 |
116 0,5 2 x 67 |
168 0,6 2 x 115 |
265 0,7 2 x 210 |
- | - | - |
| 4 | N: dcu [mm]: Lnom [mH]: |
27 0,6 2 x 6,0 |
42 0,7 2 x 11 |
62 0,8 2 x 19 |
79 0,8 2 x 25 |
130 1,0 2 x 50 |
178 1,0 2 x 75 |
215 1,12 2 x 90 |
- |
| 6 | N: dcu [mm]: Lnom [mH]: |
18 0,7 2 x 2,5 |
28 0,8 2 x 5,0 |
42 0,9 2 x 8,8 |
59 1,0 2 x 14 |
86 1,24 2 x 22 |
113 1,4 2 x 30 |
160 1,4 2 x 50 |
189 1,6** 2 x 59 |
| 8 | N: dcu [mm]: Lnom [mH]: |
13 0,8 2 x 1,4 |
20 1,0 2 x 2,5 |
31 1,12 2 x 4,8 |
42 1,12 2 x 7,0 |
66 1,4 2 x 13 |
92 1,4 2 x 20 |
116 1,6** 2 x 26 |
145 1,8** 2 x 35 |
| 10 | N: dcu [mm]: Lnom [mH]: |
- | 16 1,12 2 x 1,5 |
25 1,24 2 x 3,0 |
32 1,24 2 x 4,0 |
50 1,4 2 x 7,5 |
75 1,6** 2 x 13 |
88 1,8** 2 x 15 |
115 2,0** 2 x 22 |
| 12 | N: dcu [mm]: Lnom [mH]: |
- | - | 20 1,4 2 x 2,0 |
28 1,4 2 x 3,0 |
45 1,6** 2 x 6,0 |
65 1,8** 2 x 10 |
75 1,8** 2 x 11 |
92 2,0** 2 x 14 |
| 14 | N: dcu [mm]: Lnom [mH]: |
- | - | - | 25 1,6** 2 x 2,5 |
41 1,8** 2 x 5,0 |
53 2,0** 2 x 6,5 |
68 2,0** 2 x 9,0 |
85 2,0** 2 x 12 |
| 16 | N: dcu [mm]: Lnom [mH]: |
- | - | - | 20 1,6** 2 x 1,5 |
30 1,8** 2 x 2,7 |
45 2,0** 2 x 4,8 |
58 2,2** 2 x 6,5 |
74 2,2** 2 x 9,0 |
* — Specified value of operating current relates to common-mode choke not having a forced cooling.
Used denominations:
N — number of winding’s turns
dcu — copper wire’s cross section diameter (it is recommended to use a licentrate)
Lnom — nominal value of common-mode choke winding’s inductance
