subject: Power Class Components To Meet The Needs Of Thin Flat-panel Tv - Flat Screen Tv, Power Supply Class [print this page] < BR> In recent years, the number < BR> In recent years, the number
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The growing popularity of fast machine to the smaller, lighter direction, particularly
Flat Panel TV
Thin the framework of the trend even more pronounced. In this case, power supply circuits necessary part of smaller, thinner. As one of its solutions, TDK fully owned development from raw material to the application project package technology to develop a new type of transformer, transformer products to achieve a smaller, thinner, and has mass. The development of the power transformers, power factor improvement with a choke, line filter of three products. These products for flat panel
TV
Part of the power circuit, which allows the power circuit component assembly of printed circuit board height from the previous 25mm ~ 30mm lowered 15mm, achieving a thin.
Components focused their attention on development machine
In general, the requirements of the power class of the following three components: first, to meet the whole product of smaller, thinner demand; second, to reduce costs to cope with the current rising prices of raw materials ; Third, reduce carbon dioxide emissions, reduce pollution of the environment, to achieve high reliability. The traditional power supply transformers are ferrite cores and transformers were designed to meet the user's requirements, however, this design system can not effectively achieve these three objectives.
TDK give full play to the company's strong vertical integration model, according to machine development trends to determine the demand for power supply circuit, to optimize the ferrite core transformer, and from the properties and structure of balance, processing, installation technology, automation and increased productivity point of view to rethink product development.
TDK many years has been engaged in the development of ferrite materials. Compared with other ferrite, MnZn series ferrite with high permeability, low loss, high saturation flux density characteristics. Such as core loss and magnetic initial permeability, etc. Most of the characteristics in structure sensitive, highly vulnerable to chemical composition, fine structure and other factors. In order to produce high-performance ferrite, fine structures of process control technology is extremely important.
Impurities on material control, material mixed grinding, sintering of other profiles, TDK has been able to control the core of the high density of sintering, cation content and sodium handling defects in the grain boundary, which was high in saturated magnetic flux density and reduce the wear and tear. For example, in "PC47" materials, grain boundary to form a thickness of 2nm ~ 3nm of uniform amorphous layer, which is excellent core loss characteristics, and "PC40" material than, "PC47" core loss characteristics of materials improvement (reduction) 40%, saturation flux density characteristics of about 8%.
In addition, TDK is also the magnetic anisotropy constant control technology, with such as "PC95" material best suited to motor core loss temperature characteristics, developed with the characteristics of the material to meet various needs.
TDK developed product selection "PC47" is the best material in "small" and "thin" and "low cost", "green", "highly reliable" and so achieve the development goals.
New flat-panel TV improve energy efficiency
The following to flat TV with the power circuit, for example, the three products were optimized and small process explained.
Resonant circuit part of the main power transformer for the voltage transformation, from the PFC (power factor correction) circuit output voltage is transformed to provide
Panel
With the voltage as well as parts of the system voltage circuit, so must be able to cope with low voltage and high current. In addition, in order to achieve smaller, thin, ferrite cores should have low loss, even at high saturation magnetic flux density can be controlled under the conditions of heat, it is necessary to effectively use "PC47" material properties, using the Material can be the following three results:
First, reduce the heat. Compared with the general material, "PC47" material about reducing losses 170kW/m2, just replace the core can reduce the temperature. Flat TV with the power of the very strict temperature requirements, long-term over-heating, welding Jie He will produce some of the aging of the metal, resulting in performance is greatly affected. Such measures can reduce the heat to improve reliability, but also reduce carbon dioxide emissions.
