Electromagnetic induction device and manufacturing method therefor

Abstract

An electromagnetic induction device, comprising a magnetic coating (110) and at least one set of coils (120). The magnetic coating (110) is formed by splicing all magnetic cells together, and is provided therein with at least one cavity. Magnetic division surfaces (AA) between each two magnetic cells are substantially arranged along a magnetic flux loop without cutting off the magnetic flux loop. The coils (120) are placed in a cavity formed by the magnetic coating (110), and the magnetic flux loop in the magnetic coating (110) is formed by the coils (120) after being energized. The overall structure of the magnetic coating (110) comprises at least two magnetically permeable layers (110′, 110″). The electromagnetic induction device, on the one hand, can be substantially closed to reduce leakage flux; on the other hand, since there is no air gap on a magnetic unit, the magnetic reluctance is effectively reduced. In addition, the magnetic coating (110) is of a layered structure so that the electromagnetic induction device can be fabricated in a superposed manner, thereby not only reducing the manufacturing difficulty, but also facilitating obtaining a high-performance flat electromagnetic induction device. Also provided is a corresponding method for manufacturing the electromagnetic induction device.

Dependencies are inferred from the claim text.