UNCOUPLED MULTI-PHASE INDUCTOR

The disclosure is related to an uncoupled multi-phase inductor that includes a primary iron core, multiple secondary iron cores, multiple metal strip coils and multiple sheet members. The primary iron core includes multiple grooves, in which multiple middle cylinders are correspondingly installed. The middle cylinders in the primary iron core, the secondary iron cores in the grooves, and the metal strip coils are assembled. The sheet members are also integrated in the assembly for forming one single device with two or more inductors. For reaching a requisite inductance, the inductors administrate air gaps among the primary iron core and the secondary iron cores by the sheet members. The multi-phase inductor shares the middle cylinder with the primary iron core as one device so as to increase power density since the space can be saved. The device integrated with the two or more inductors has an extreme low coupling coefficient.