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　 The interaction between the current of the BIG power inductor and the coil is called the electrical inductance, which is the inductance. The unit is “Henry (H)”, named after the American scientist Joseph Henry. It describes the circuit parameters that cause the induced electromotive force effect in this coil or in another coil due to the change of the coil current. Inductance is the general term for self-inductance and mutual inductance. Devices that provide inductance are called inductors.

　　 The definition of inductance here is a property of a conductor, which is measured by the ratio of the electromotive force or voltage induced in the conductor to the rate of change of the current that produces this voltage. The steady current produces a stable magnetic field, and the constantly changing current (AC) or fluctuating direct current produces a changing magnetic field. The changing magnetic field in turn induces an electromotive force in the conductor in this magnetic field. The magnitude of the induced electromotive force is proportional to the rate of change of the current. The scale factor is called the inductance, represented by the symbol L, and the unit is Henry (H).

　　Inductance is a property of a closed loop, that is, when the current passing through the closed loop changes, an electromotive force will appear to resist the change of the current. This kind of inductance is called self-inductance, which is the property of the closed loop itself. Assuming that the current in a closed loop changes, an electromotive force is generated in another closed loop due to induction. This inductance is called mutual inductance.

　　Actually, inductor is also divided into self-inductor and mutual inductor. When current flows through the coil, a magnetic field will be generated around the coil. When the current in the coil changes, the surrounding magnetic field also changes accordingly. This changing magnetic field can cause the coil itself to generate induced electromotive force (induced electromotive force) (electromotive force is used to represent the terminal voltage of the ideal power supply for active components). It’s self-sense. When two inductance coils are close to each other, the magnetic field change of one inductance coil will affect the other inductance coil, and this effect is mutual inductance. The magnitude of the mutual inductance depends on the degree of coupling between the self-inductance of the inductor coil and the two inductor coils. The components made using this principle are called mutual inductors.

　　 Through the above, everyone knows the meaning of inductance is different! Inductance is also divided into physical quantities and devices, and they are also closely related. More information about power inductors is available in Maixiang Technology. Friends who are interested in understanding, please stay tuned for updates on this site.