Industrial Technology Research Institute

Yen-Ping Wang

Yu-Ting Huang

Mean-Jue Tung

Wen-Song Ko

Ping-Feng Hsu

This invention discloses a monolithic inductor including a body made by compressing a magnetic powder, a coil positioned in the body, and a permanent magnet positioned in the body and in a magnetic circuit formed by applying current to the coil. The monolithic inductor of this invention includes the magnetic body containing the permanent magnet and the coil. The permanent magnet in the magnetic circuit (path of magnetic flux lines) formed by applying current to the coil generates a reverse-bias magnetic field, thereby increasing the operating range of the magnetic body, the saturation current of the magnetic body, and the rated current of the inductor.

Monolithic inductor

The present invention relates to a power inductor having a heat dissipating structure formed on the surface thereof, which comprises: at least a conducting wire; and a cladding, made of a magnetic material for wrapping the conductive wire, having the heat dissipating structure of embossed patterns formed on the surface thereof. Preferably, the embossed pattern can be a cone, a cuboid, a column, or the combination thereof. Moreover, the length of any edge or the diameter of any one of the embossed patterns is about 1%&#x2dc;50% of that of the power inductor, and the height of any one of the embossed patterns is about 1%&#x2dc;50% of the thickness of the power inductor.

Power inductor with heat dissipating structure

A ferrite with a high permeability and a high dielectric constant is introduced. Raw material powders, such as TiO , Fe O and the oxide of Mn, Ni, Cu, Mg, Li or Zn is prepared and combined in the proportion Ti (MFe O ) , where x&plus;y&equals;1 and 0<&times;<1. M is any one of a mixture of metals selected from Mn, Ni, Cu, and Zn. The ratio between x and y can be adjusted according to practical needs to obtain ferrites with different permeabilities and dielectric constants. The ferrite can simultaneously be a magnetic material and a dielectric material in an electronic element. This can avoid the possible drawbacks due to sintering of two different materials in the prior art.

Growing community of inventors

Hsinchu, Taiwan

Yen-Ping Wang