Introduction
Toroidal inductors consist of a toroidal or toroidal core with a section of copper wire wound. These rings are made of different ferromagnetic materials such as silicon steel, ferrite, laminated iron, iron powder, or nickel. Toroidal inductors have a high coupling result between windings and early saturation.
This structure provides minimal flux loss and helps avoid other devices coupling magnetic flux. Toroidal inductors have high inductance values and maximum energy transfer efficiency in low-frequency applications.
Scope of application
Applications for toroidal inductors include the following
Toroidal inductors are suitable for telecommunications, medical equipment, industrial control, musical instruments, ballasts, electronic brakes, refrigeration equipment, electronic clutches, aerospace and nuclear applications, amplifiers and air conditioning equipment.
Used in different electronic circuits such as inverters, power supplies and amplifiers, but also in electronic devices such as computers, radios, televisions and audio systems
These are used in SMPS, EMI (electromagnetic interference) sensitive circuits and filter applications
Product features
Main advantages and disadvantages
The advantages of toroidal inductors mainly include the following:
Lighter weight. Toroidal inductors are more compact than cores of other shapes because they are made of less material.
Toroidal inductors produce high inductance because closed-loop cores have a strong magnetic field and they emit very low electromagnetic interference.
Because there is no air gap, these inductors are much quieter than other typical inductors.
Toroidal inductors have a closed-loop core, so they have a high magnetic field, higher inductance, and Q value.
The windings are fairly short and injured in a closed magnetic field, so it will improve electrical performance, efficiency and reduce distortion and edge effects. Due to the balance of the toroid, the small magnetic flux escaping from the iron core is low, so the disadvantages of this inductor that are very efficient and radiate EMI (electromagnetic interference) to nearby circuits compared to ring inductors mainly include the following:
Occasional problems arise during actual operation and testing, and it is very difficult to wind with a machine.
In these inductors, the implementation of insulation is more complicated, and it is difficult to have a magnetic gap between the mesh windings.
Toroids are harder to wind and harder to tune. However, they are more efficient in generating the required inductance. For the same inductance as a normal solenoid, the toroidal ticket requires fewer market numbers and can be made smaller
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