Local reverse-coupling toroidal inductor

Abstract

The invention discloses a local reverse-coupling toroidal inductor which comprises a toroidal iron core. The toroidal inductor is characterized in that the toroidal iron core includes a middle iron core (2) arranged in the middle and a top iron core (1) and a bottom iron core (3) respectively arranged in the upper and lower layers of the middle iron core (2), and the three layers of iron cores are respectively wound with a top coil (L1) and a bottom coil (L2). In the local reverse-coupling toroidal inductor, the iron core part includes three layers. The top coil and the bottom coil on the middle iron core are used for reverse local coupling so as to reduce ripple current, eliminate leakage inductance and the low-frequency harmonic of a coupled part, lower inductance noise, electromagnetism and radio frequency interference and decrease the required filter inductance value by two thirds, and consequently reduce ripple current, eliminate leakage inductance and the low-frequency harmonic of a coupled part, lower inductance noise and radio frequency interference, and reduce volume, material consumption and the grade of using materials as well as operating energy consumption.

Description

technical field [0001] The invention relates to electromagnetic components, in particular to a local reverse coupling loop inductor. Background technique [0002] Switching power converters are used to transform or stabilize voltage, current, and frequency. At present, most converters use independent uncoupled inductors, and some converters use independent inductors in series / parallel. The application of coupled inductors is limited by traditional core shapes such as C-type cores, E-type cores, air-gap cores, and winding methods of coils. There are generally large filter inductance values, more leakage inductance, large noise, and electromagnetic interference. The problems of heavy interference and radio frequency interference pollution, high cost of consumables, and high energy consumption in operation. Contents of the invention [0003] The purpose of the present invention is to overcome the problems existing in the above-mentioned prior art, and propose a partially cou...

AI Technical Summary

Problems solved by technology

The application of coupled inductors is limited by traditional core shapes such as C-type cores, E-type cores, air-gap cores, and winding methods of coils. There are generally large filter inductance values, more leakage inductance, large noise, and electromagnetic interference. The problems of heavy interference and radio frequency interference pollution, high cost of consumables, and high energy consumption in operation

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