The inductance of the coil depends on a number of its design features. The number of rounds, diameter, a type of the core, its arrangement, etc. belong to them. In order that the inductance changed, enough corresponding in the way to change at least one of these parameters.
Instruction
1. Domotayte to the coil additional rounds. It will increase inductance coils at invariable parameters of its other structural elements, and at a variometer (the coil with the mobile core) - both limits of change of inductance (top and lower) towards increase will displace. When winding additional rounds it can turn out that they are not located on a framework. Do not give in to temptation to use thinner wire, than what is used in the coil originally not to cause heating of a winding the current proceeding on it.
2. Add that to the coil which does not have the core. But you remember that it has to be made of such material in which to the operating frequency of the coil there are no losses on vortex currents. The continuous steel core will be suitable for the electromagnet working at a direct current, for the 50-hertz transformer - the core gathered from the oxidized sheets of steel in more high-frequency coils it is necessary to use cores from ferrite of various brands.
3. Remember that even at the same quantity of rounds and other equal parameters the coil of large diameter will have also big inductance. It is clear, however that wires for its production will be required more.
4. Ferrite is produced with various magnetic permeability. Replace one ferrite core in the coil with another at which the value of this parameter is higher, and its inductance will increase. But at the same time the boundary frequency at which such coil will be able to work without emergence of noticeable losses in the core will decrease.
5. There are coils supplied with special mechanisms for movement of the core. To increase inductance in this case, move the core in a framework.
6. The closed magnetic conductor with other things being equal provides big inductance, than opened. But try not to apply such decision in the transformers and throttles working in the presence of a constant component. It is capable to podmagnichivat and sate the closed core, thereby, on the contrary, causing decrease in inductance of the coil.