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Mutual inductance and self-inductance in chip inductors
Jun 10, 2017



Mutual inductance and self-inductance in chip inductors


 The working principle of the chip inductor is based on the self-inductance and mutual inductance exhibited by the current in the circuit. According to the principle of electromagnetic induction, a magnetic field is generated when a current passes through a wire, and the magnetic flux of the magnetic field acts on the circuit. According to Lenz's law, the magnetic flux tends to resist the change of current by the induced voltage (back electromotive force).


 The ratio of the amount of flux change to the amount of current change is self-inductance, and the chip inductor is a component with self-inductance characteristics.

 Mutual inductance: When two inductor coils are close to each other, the change of the magnetic field of one inductor coil will affect the other inductor coil. The effect is mutual inductance. The magnitude of the mutual inductance depends on the degree to which the inductance of the inductor is coupled to the two inductors.


Self-inductance: When there is current in the coil, a magnetic field is 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 an induced electromotive force, which is self-inductance.


The gain inductor sums up the mutual inductance and self-inductance in the chip inductor. The effect of the chip inductor is to isolate, filter or form a resonant circuit with the capacitor and the resistor, and manufacture the transformer to isolate or change the voltage. The power of the equipment.

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