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Transformer core Category Description
1. High Frequency categories: iron core Ferritecore
Ferritecore for high-frequency transformer which is a ceramic body having a spinel crystalline structure, such as iron oxide spinel and other bivalent metal compounds such as kFe2O4 (k represent other metals), it is currently often used The metals are manganese (Mn), zinc (Zn), Nickel (Ni), magnesium (Ng), copper (Cu).
Its common combinations such as manganese-zinc (MnZn) series, nickel-zinc (NiZn) series and magnesium zinc (MgZn) series. Such materials have high permeability and impedance of the physical properties, the use of the frequency range over 1kHz to 200kHz.
2. Low Frequency categories: silicon (LAMINATION)
Silicon for low-frequency transformer, the many different types, according to the production process can be divided into A: calcination (black pieces), N:. None calcination (white sheet) in two different shapes can be divided according to their: EI type , UI, C-type, in the mouth.
Mouth silicon often in large power transformers in use, good insulation properties it is easy to heat, while short magnetic circuit, mainly for power is greater than 500 ~ 1000W and power transformers. By two C-type silicon composed of a silicon-type silicon known as CD, CD-type silicon produced by power transformer in the same cross-sectional area of the condition, the more the higher the window.
The greater the power transformer. Can be installed on both sides of the iron core coil respectively, and therefore the transformer turns can be assigned on two line package, so that the average length of the turns of each line package shorter coil copper consumption is reduced. Also, if the requirements of two symmetrical coils are wound on the two-line package, you can achieve completely symmetrical effect. It consists of four C-type silicon steel sheet composed of a shape called a transformer Chengbian wide shape ED-type silicon .ED type silicon made under the same conditions as ED power transformer shorter than some CD-type transformers, width bigger, the other due to the coil is mounted in the middle of silicon, there is an external magnetic circuit, and therefore magnetic flux leakage is small, small overall interference. But it all coils are wound on a line package, line package thicker, so the average turn length is longer , copper consumption is large.
C-core transformer excellent performance produced by the small size, light weight, high efficiency, the assembly point of view, C-type silicon parts rarely, versatility, and therefore high production efficiency, but C-type silicon processing steps than the and more, for a more complex, required special equipment manufacturing, the cost of which is currently still high.
E-type silicon, also known as shell-type or date type silicon, its main advantage is the beginning, a secondary coil bobbin together, accounted for a higher window (Duty Km space factor: copper net cross-sectional area and the window area ratio); silicon to form a protective shell of the winding, the winding less susceptible to mechanical injury injury; while silicon larger cooling area, but less divergent magnetic transformer primary to secondary leakage inductance of its large external magnetic interference is large In addition, due to the longer average winding perimeter, in the same number of turns and cross-sectional area of the core conditions, EI-core transformers used in copper more.
The thickness of the silicon steel commonly used 0.35mm, 0.5mm two kinds.
Silicon assembly methods are overlapping method and the two were stacked. Overlap method is to open one silicon alternately distributed on both sides, which were stacked too much trouble, but the small silicon gap, the reluctance of small conducive to increasing the flux, so the power transformer have adopted this approach. to stack method commonly used in the case of DC current through, in order to avoid causing a DC current saturation, we need to leave a gap between the silicon, so the stack method E tablets and I slices and put aside, the gap between the two pieces of paper can be used to adjust.
3.COIL categories: three types.
A.TOROID toroidal: O-laminations made from silicon or winding the core of such a wound is very difficult.
B.RODCORE plunger.
C.DRUMCORE: drum-shaped core.
Ferritecore for high-frequency transformer which is a ceramic body having a spinel crystalline structure, such as iron oxide spinel and other bivalent metal compounds such as kFe2O4 (k represent other metals), it is currently often used The metals are manganese (Mn), zinc (Zn), Nickel (Ni), magnesium (Ng), copper (Cu).
Its common combinations such as manganese-zinc (MnZn) series, nickel-zinc (NiZn) series and magnesium zinc (MgZn) series. Such materials have high permeability and impedance of the physical properties, the use of the frequency range over 1kHz to 200kHz.
2. Low Frequency categories: silicon (LAMINATION)
Silicon for low-frequency transformer, the many different types, according to the production process can be divided into A: calcination (black pieces), N:. None calcination (white sheet) in two different shapes can be divided according to their: EI type , UI, C-type, in the mouth.
Mouth silicon often in large power transformers in use, good insulation properties it is easy to heat, while short magnetic circuit, mainly for power is greater than 500 ~ 1000W and power transformers. By two C-type silicon composed of a silicon-type silicon known as CD, CD-type silicon produced by power transformer in the same cross-sectional area of the condition, the more the higher the window.
The greater the power transformer. Can be installed on both sides of the iron core coil respectively, and therefore the transformer turns can be assigned on two line package, so that the average length of the turns of each line package shorter coil copper consumption is reduced. Also, if the requirements of two symmetrical coils are wound on the two-line package, you can achieve completely symmetrical effect. It consists of four C-type silicon steel sheet composed of a shape called a transformer Chengbian wide shape ED-type silicon .ED type silicon made under the same conditions as ED power transformer shorter than some CD-type transformers, width bigger, the other due to the coil is mounted in the middle of silicon, there is an external magnetic circuit, and therefore magnetic flux leakage is small, small overall interference. But it all coils are wound on a line package, line package thicker, so the average turn length is longer , copper consumption is large.
C-core transformer excellent performance produced by the small size, light weight, high efficiency, the assembly point of view, C-type silicon parts rarely, versatility, and therefore high production efficiency, but C-type silicon processing steps than the and more, for a more complex, required special equipment manufacturing, the cost of which is currently still high.
E-type silicon, also known as shell-type or date type silicon, its main advantage is the beginning, a secondary coil bobbin together, accounted for a higher window (Duty Km space factor: copper net cross-sectional area and the window area ratio); silicon to form a protective shell of the winding, the winding less susceptible to mechanical injury injury; while silicon larger cooling area, but less divergent magnetic transformer primary to secondary leakage inductance of its large external magnetic interference is large In addition, due to the longer average winding perimeter, in the same number of turns and cross-sectional area of the core conditions, EI-core transformers used in copper more.
The thickness of the silicon steel commonly used 0.35mm, 0.5mm two kinds.
Silicon assembly methods are overlapping method and the two were stacked. Overlap method is to open one silicon alternately distributed on both sides, which were stacked too much trouble, but the small silicon gap, the reluctance of small conducive to increasing the flux, so the power transformer have adopted this approach. to stack method commonly used in the case of DC current through, in order to avoid causing a DC current saturation, we need to leave a gap between the silicon, so the stack method E tablets and I slices and put aside, the gap between the two pieces of paper can be used to adjust.
3.COIL categories: three types.
A.TOROID toroidal: O-laminations made from silicon or winding the core of such a wound is very difficult.
B.RODCORE plunger.
C.DRUMCORE: drum-shaped core.
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