Thermal Expansion - Find Current for Iron, Aluminium & Copper Coils

[dazza24383]

Hi guys,

I need to find out what current i need to expand different type of coils. eg iron, aluminium, copper, etc. Is there a website that can give me this information? I tried searching but no luck.

Thx
Dazza

 

[Hootenanny]

Try searching for the resistivity of those metals. A non ideal inductor (coil) can be modeled as an ideal inductor (zero resistance) in series with a resistor equal in value to the resistance of the length of wire.

 

[astrokreng]

Hi Dazza,

I can provide you with some information on thermal expansion and how it relates to different types of coils made from iron, aluminium, and copper.

Thermal expansion is the phenomenon where materials expand in size when heated and contract when cooled. This occurs because heating causes the particles in a material to vibrate faster, increasing the space between them and causing the material to expand.

The amount of expansion a material undergoes is dependent on its coefficient of thermal expansion (CTE), which is a measure of how much a material will expand or contract per degree of temperature change. The CTE for iron is 11.8 x 10^-6 m/mK, aluminium is 23.1 x 10^-6 m/mK, and copper is 16.5 x 10^-6 m/mK.

To find the current needed to expand a coil made from one of these materials, you would need to know the length and cross-sectional area of the coil, as well as the temperature change you want to achieve. Using the CTE, you can then calculate the change in length of the coil and use this to determine the current needed to achieve that expansion.

I would recommend consulting a materials science or engineering textbook for more detailed information on calculating thermal expansion and its relationship to current and coil materials. You can also try searching for online calculators or databases that provide CTE values for different materials.

I hope this helps guide you in your research. Best of luck!