The Inductance of Golden Eagle's Wireless Charger Coils Is Stable And Reliable, Leaving You with Absolutely No Worries

The inductance of Golden Eagle's wireless charger coils is stable and reliable, leaving you with absolutely no worries 

Inductance refers to the intensity of current that a coil can induce when moving in a magnetic field, with the unit being "Henry" (H). It also refers to the component made using this property. Inductance is the electromagnetic induction characteristic (including self-inductance and mutual inductance) exhibited by inductive components in a circuit, and a coil is an inductive component. Broadly speaking, inductance exists everywhere in a circuit; it is not just coils that have inductance in a circuit! In circuits with a sufficiently high frequency, any component or line has an inductive effect. To be precise, a coil is an inductive component, and the main component of inductance is the coil.

The electrical characteristics of an inductance coil are the opposite of those of a capacitor: it "allows low-frequency signals to pass through and blocks high-frequency signals". High-frequency signals will encounter great resistance when passing through an inductance coil and thus can hardly pass through; while the resistance presented to low-frequency signals when passing through it is relatively small, meaning low-frequency signals can pass through it more easily. The resistance of an inductance coil to direct current is almost zero.

Resistance, capacitance, and inductance all present a certain resistance to the flow of electrical signals in a circuit, and this resistance is what we call "impedance". The impedance presented by an inductance coil to current signals utilizes the self-inductance of the coil. Sometimes, we simply refer to an inductance coil as an "inductor" or "coil", denoted by the letter "L". When winding an inductance coil, the number of turns of the coil is generally called the "number of turns" of the coil.

The inductance stability of an inductance coil refers to the degree to which the parameters of the inductance coil change with variations in environmental conditions. The inductance temperature coefficient ɑL is usually used to evaluate the stability of the coil, which represents the stability of the inductance relative to temperature. The inductance temperature coefficient is mainly caused by the expansion of the coil wire after being heated, which leads to geometric deformation of the coil. To improve the temperature stability of the coil, a hot winding method can be used to make the coil: pass current through the wire used for winding the coil to heat the wire before winding, so that the coil will shrink and fit tightly on the framework after cooling, making it less likely to deform when heated, thereby improving stability accordingly.

In addition to temperature, humidity can also cause changes in the parameters of inductance coils. For example, an increase in humidity will increase the distributed capacitance and loss of the coil, reducing the stability of the coil. To prevent humidity from affecting the parameters of the coil, moisture-proof measures are usually taken during the production of inductance coils, such as encapsulation with epoxy resin or impregnation treatment.