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VPH4-0075-R Datasheet(PDF) 6 Page - Cooper Bussmann, Inc. |
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VPH4-0075-R Datasheet(HTML) 6 Page - Cooper Bussmann, Inc. |
6 / 8 page HOW TO USE MULTIPLE WINDINGS L TOTAL = LBASE x S 2 = 10 µH x 2 2 = 40 µH Where: L BASE = Inductance of a single winding P = Number of windings in parallel (use 1 with all windings in series) S = Number of windings in series I BASE = Maximum current rating of one winding I MAX = I BASE x P = 1 Amp x 1 = 1 Amp L TOTAL = LBASE x S 2 = 10 µH x 1 2 = 10 µH I MAX = I BASE x P = 1 Amp x 2 = 2 Amps 10 µH 1 Amp 10 µH 1 Amp 10 µH 1 Amp Series Connected (2 Windings) Parallel Connected (2 Windings) 10 µH 1 Amp Discrete inductors combine like resistors, when connected in series or parallel. For example, inductors in series add and inductors in parallel reduce in a way similar to Ohm’s Law. Windings on the same magnetic core behave differently. Two windings in series result in four times the inductance of a single winding. This is because the inductance varies proportionately to the square of the turns. Paralleled VERSA-PAC windings result in no change to the net inductance because the total number of turns remains unchanged; only the effective wire size becomes larger. Two parallel windings result in approximately twice the current carrying capability of a single winding. The net inductance of a given PCM configuration is based on the number of windings in series squared multiplied by the inductance of a single winding (LBASE). The current rating of a PCM configuration is derived by multiplying the maximum current rating of one winding (IBASE) by the number of windings in parallel. Examples of simple two-winding devices are shown below: L Series = L1 + L2 + L3...Ln L Parallel = 1/ [1/ L1 + 1/ L2 + 1/ L3....1/Ln] ® VERSA-PAC® Inductors and Transformers (Surface Mount) |
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