Permissible deviation of inductor

The allowable deviation refers to the allowable error value between the nominal inductance on the inductor and the actual inductance.
Inductors commonly used in circuits such as oscillation or filtering require high accuracy, with an allowable deviation of ± 0.2% to ± 0.5%; The accuracy requirements for coils used for coupling, high-frequency resistance current, etc. are not high; The allowable deviation is ± 10%~15%.
The quality factor, also known as Q-value or goodness of merit, is the main parameter that measures the quality of an inductor.
It refers to the ratio of the inductance presented by an inductor when operating at a certain frequency of AC voltage to its equivalent loss resistance. The higher the Q value of an inductor, the smaller its loss and higher its efficiency.
The quality factor of an inductor is related to the DC resistance of the coil wire, the dielectric loss of the coil skeleton, and the losses caused by the iron core, shielding cover, etc.
Distributed capacitance refers to the capacitance that exists between turns of a coil, between coils and magnetic cores, between coils and ground, and between coils and metal. The smaller the distributed capacitance of an inductor, the better its stability. Distributed capacitance can increase the equivalent energy dissipation resistance and quality factor. Reducing distributed capacitance often involves using wire wrapped or multi stranded enameled wires, and sometimes honeycomb winding methods are also used.
Rated current
Rated current refers to the maximum current that an inductor can withstand under the allowable working environment. If the working current exceeds the rated current, the inductor will change its performance parameters due to heating, and even burn out due to overcurrent.