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thermal_resistance_of_ferrite_cores [2019/06/03 18:30] |
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+ | ====== Thermal resistance of ferrite cores ====== | ||
+ | |||
+ | |< 100% >| | ||
+ | | // | ||
+ | |||
+ | |< 100% >| | ||
+ | | {{/ | ||
+ | |||
+ | |||
+ | The values of [[thermal resistance]] of main core shapes for [[ferrite transformer|ferrite transformers]], | ||
+ | [(Goldman> | ||
+ | |||
+ | Empirical data given by [[Epcos]] (see image) suggest that in the first approximation the thermal resistance is proportional to the reciprocal of square root of the ferrite core volume.[(Epcos)][(Maniktala> | ||
+ | |||
+ | {{page> | ||
+ | |||
+ | <box left 70% #f0f0f0> | ||
+ | Thermal resistance of ferrite cores, the dashed line shows the underlying trend proportional to the reciprocal of square root of core volume[(Epcos)] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | <WRAP clear></ | ||
+ | {{page> | ||
+ | |||
+ | ===== E (EE) ===== | ||
+ | ^ Core shape [[E (core)|E]] | ||
+ | | E 5.3/2.7/2 | 308 | | 334 | | ||
+ | | E 6.3/2.9/2 | 283 | | 290 | | ||
+ | | E 8.8/4.1/2 | 204 | | 210 | | ||
+ | | E 13/ | ||
+ | | E 14/ | ||
+ | | E 16/ | ||
+ | | E 16/ | ||
+ | | E 19/ | ||
+ | | E 20/ | ||
+ | | E 21/ | ||
+ | | E 25/ | ||
+ | | E 25.4/10/7 | 41 | | 37 | | ||
+ | | E 30/ | ||
+ | | E 32/ | ||
+ | | E 32/ | ||
+ | | E 34/ | ||
+ | | E 36/ | ||
+ | | E 40/ | ||
+ | | E 42/ | ||
+ | | E 42/ | ||
+ | | E 47/ | ||
+ | | E 55/ | ||
+ | | E 55/ | ||
+ | | E 56/ | ||
+ | | E 65/ | ||
+ | | E 70/33/32 (E71/ | ||
+ | | E 80/ | ||
+ | |||
+ | ===== EC ===== | ||
+ | ^ Core shape [[EC (core)|EC]] ^ // | ||
+ | | EC 35 | 18.5 | 18 | 19 | | ||
+ | | EC 41 | 16.5 | 15 | 15 | | ||
+ | | EC 52 | 11.0 | 11 | 11 | | ||
+ | | EC 70 | 7.5 | 7 | 7.2 | | ||
+ | |||
+ | ===== EE LP ===== | ||
+ | ^ Core shape [[EE LP (core)|EE LP]] ^ // | ||
+ | | EE LP 14 | 105 | 102 | | ||
+ | | EE LP 18 | 56 | 54.3 | | ||
+ | | EE LP 22 | 35 | 32.0 | | ||
+ | | EE LP 32 | 24 | 21.3 | | ||
+ | | EE LP 38 | 18 | 15.1 | | ||
+ | | EE LP 43 | 15 | 12.9 | | ||
+ | | EE LP 58 | 11 | 9.3 | | ||
+ | | EE LP 64 | 9 | 7.1 | | ||
+ | |||
+ | |||
+ | ===== EFD ===== | ||
+ | |||
+ | <box right 30% #f0f0f0> | ||
+ | Transformer [[EFD25]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | ^ Core shape [[EFD (core)|EFD]] | ||
+ | | EFD 10/ | ||
+ | | EFD 15/ | ||
+ | | EFD 20/10/7 | 45 | 43 | | ||
+ | | EFD 25/13/9 | 30 | 28 | | ||
+ | | EFD 30/15/9 | 25 | 23 | | ||
+ | |||
+ | ===== EI LP ===== | ||
+ | ^ Core shape [[EI LP (core)|EI LP]] ^ // | ||
+ | | EI LP 14 | 116 | 114 | | ||
+ | | EI LP 18 | 61 | 59.7 | | ||
+ | | EI LP 22 | 38 | 36.0 | | ||
+ | | EI LP 32 | 26 | 23.4 | | ||
+ | | EI LP 38 | 20 | 16.7 | | ||
+ | | EI LP 43 | 16 | 14.2 | | ||
+ | | EI LP 58 | 12 | 10.2 | | ||
+ | | EI LP 64 | 9.5 | 7.6 | | ||
+ | |||
+ | ===== EP ===== | ||
+ | ^ Core shape [[EP (core)|EP]] ^ // | ||
+ | | EP 5 | 329 | 352* | | ||
+ | | EP 6 | 318 | 346* | | ||
+ | | EP 7 | 141 | 142* | | ||
+ | | EP 10 | 122 | 121* | | ||
+ | | EP 13 | 82 | 79* | | ||
+ | | EP 17 | 58 | 54* | | ||
+ | | EP 20 | 32 | 29* | | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // ||| | ||
+ | |||
+ | ===== ER ===== | ||
+ | ^ Core shape [[ER (core)|ER]] | ||
+ | | ER 9.5/ | ||
+ | | ER 11/2.5/6 (ER 11/5) | 134 | | 136 | | ||
+ | | ER 14.5/3/7 (ER 14.5/6) | 99 | | 96 | | ||
+ | | ER 28/14/11 | | | 22 | | ||
+ | | ER 28/17/11 | 22 | | 20 | | ||
+ | | ER 35/20/11 | 18 | | 15 | | ||
+ | | ER 42/22/15 | 14 | 12 | 12 | | ||
+ | | ER 46/17/18 | 13 | | 12 | | ||
+ | | ER 49/27/17 | 9 | 9 | 8.7 | | ||
+ | | ER 54/18/18 | 11 | 11 | 9.7 | | ||
+ | |||
+ | ===== ETD ===== | ||
+ | |||
+ | <box right 30% #f0f0f0> | ||
+ | Transformer [[ETD44]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | ^ Core shape [[ETD (core)|ETD]] | ||
+ | | ETD 19/ | ||
+ | | ETD 24/ | ||
+ | | ETD 29/16/10 | 28 | | 21.2 | | ||
+ | | ETD 34/17/11 | 20 | 19 | 17.7 | | ||
+ | | ETD 39/20/13 | 16 | 15 | 14.2 | | ||
+ | | ETD 44/22/15 | 11 | 12 | 11.2 | | ||
+ | | ETD 49/25/16 | 8 | 11 | 9.5 | | ||
+ | | ETD 54/28/19 | 6 | | 7.7 | | ||
+ | | ETD 59/31/22 | 4 | | 6.3 | | ||
+ | |||
+ | |||
+ | ===== EV ===== | ||
+ | ^ Core shape [[EV (core)|EV]] | ||
+ | | EV 15/ | ||
+ | | EV 25/13/13 | 27 | 24 | | ||
+ | | EV 30/16/13 | 21 | 18 | | ||
+ | |||
+ | |||
+ | ===== P ===== | ||
+ | ^ Core shape [[P (core)|P]] ^ // | ||
+ | | P 3.2/2.6 | | ||
+ | | P 4.6/4.1 | | ||
+ | | P 5.8/3.3 | | ||
+ | | P 7/4 | ||
+ | | P 9/5 | 142 | | 143* | | ||
+ | | P 11/7 | 106 | | 104* | | ||
+ | | P 14/8 | 73 | 100 | 70* | | ||
+ | | P 18/11 | 51 | 60 | 47* | | ||
+ | | P 22/13 | 37 | 38 | 33* | | ||
+ | | P 26/16 | 27 | 30 | 24* | | ||
+ | | P 30/19 | 22 | 23 | 19* | | ||
+ | | P 36/22 | 17 | 19 | 14* | | ||
+ | | P 41/25 | | | 12* | | ||
+ | | P 42/29 | | 13.5 | 11* | | ||
+ | | P 66/56 | | | 4.7* | | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // |||| | ||
+ | |||
+ | |||
+ | ===== PM ===== | ||
+ | ^ Core shape [[PM (core)|PM]] | ||
+ | | PM 50/39 | 15 | 8.3* | | ||
+ | | PM 62/49 | 12 | 5.7* | | ||
+ | | PM 74/59 | 9.5 | 4.4* | | ||
+ | | PM 87/70 | 8 | 3.8* | | ||
+ | | PM 114/93 | 6 | 2.3* | | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // ||| | ||
+ | |||
+ | |||
+ | ===== PQ ===== | ||
+ | ^ Core shape [[PQ (core)|PQ]] ^ // | ||
+ | | PQ 16/11.6 | | 49* | | ||
+ | | PQ 20/16 | | 33* | | ||
+ | | PQ 20/20 | | 30* | | ||
+ | | PQ 26/20 | 24 [([[http:// | ||
+ | | PQ 26/25 | | 19* | | ||
+ | | PQ 32/20 | | 18* | | ||
+ | | PQ 32/30 | | 15* | | ||
+ | | PQ 35/35 | | 13* | | ||
+ | | PQ 40/40 | | 10* | | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // ||| | ||
+ | |||
+ | |||
+ | ===== RM ===== | ||
+ | |||
+ | <box right 30% #f0f0f0> | ||
+ | Transformer [[RM8]] | ||
+ | [[file/ | ||
+ | {{page> | ||
+ | </ | ||
+ | |||
+ | ^ Core shape [[RM (core)|RM]] ^ // | ||
+ | | RM 4 | 120 | 98* | | ||
+ | | RM 5 | 100 | 72* | | ||
+ | | RM 6 | 80 | 52* | | ||
+ | | RM 7 | 68 | 46* | | ||
+ | | RM 8 | 57 | 33* | | ||
+ | | RM 10 | 40 | 24* | | ||
+ | | RM 12 | 25 | 17* | | ||
+ | | RM 14 | 18 | 13* | | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // ||| | ||
+ | |||
+ | ===== RM LP ===== | ||
+ | ^ Core shape [[RM LP (core)|RM LP]] ^ // | ||
+ | | RM 4 LP | 135 | 112* | | ||
+ | | RM 5 LP | 111 | 84* | | ||
+ | | RM 6 LP | 90 | 59* | | ||
+ | | RM 7 LP | 78 | 51* | | ||
+ | | RM 8 LP | 65 | 38* | | ||
+ | | RM 10 LP | 45 | 28* | | ||
+ | | RM 12 LP | 29 | 20* | | ||
+ | | RM 14 LP | 21 | 15* | | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // ||| | ||
+ | |||
+ | |||
+ | ===== UI ===== | ||
+ | ^ Core shape [[UI (core)|UI]] ^ // | ||
+ | | UI 93/ | ||
+ | | UI 93/ | ||
+ | | UI 93/ | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // ||| | ||
+ | |||
+ | |||
+ | ===== UU and U ===== | ||
+ | ^ Core shape [[UU (core)|UU]] ^ // | ||
+ | | U 11 | | 46 | | ||
+ | | U 15 | | 35 | | ||
+ | | U 17 | | 30 | | ||
+ | | U 20 | | 24 | | ||
+ | | U 21 | | 22 | | ||
+ | | U 25 | | 15 | | ||
+ | | U 26 | | 13 | | ||
+ | | U 30 | | 4 | | ||
+ | | UU 93/152/16 | 4.5 | | | ||
+ | | UU 93/152/20 | 4 | 1.7 | | ||
+ | | UU 93/152/30 | 3 | 1.2 | | ||
+ | | U 101/ | ||
+ | | U 126/ | ||
+ | | U 141/ | ||
+ | | // *The calculated values are given here for comparison only, as the results can differ significantly for the non-E-like cores. // |||| | ||
+ | |||
+ | ===== See also===== | ||
+ | * [[Thermal resistance]] | ||
+ | * [[List of ferrite core types]] | ||
+ | |||
+ | ~~REFNOTES~~ | ||
+ | |||
+ | {{tag> | ||