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How to distinguish the size of the chip inductor Q?
Mar 17, 2018


            How to distinguish the size of the chip inductor Q?

The Q value of the inductor is used to measure the mass of the chip inductor, that is, the quality factor (Q), and Q is the ratio of the inductance XL to its equivalent resistance, that is, Q=XL/R.

When the inductance value of the chip inductor is the same, the smaller the DC resistance (DCR), the larger the Q value; the larger the coil winding wire diameter is, the larger the Q value is; if multi-strand wire winding is used, the number of wire strands The more Q, the higher the value; the smaller the loss of the material used for the coil bobbin (or core), the greater the Q value. For example, when a high-silicon-silicon steel sheet is used as a core, the Q value of the inductor is larger than that of an ordinary silicon steel sheet when it is used as a core; the smaller the coil distributed capacitance and the leakage magnetic flux, the larger the Q value thereof. For example, the coil of the honeycomb-style coiling method has a larger Q value than when it is wound round and is larger than when coiled around; the coil is not shielded. When there are five metal components around the installation position, the Q value is large, and on the contrary, the Q value is smaller. small. The closer the shield or metal member is to the coil, the lower the Q value; for a high frequency coil with a magnetic core, the Q value is higher than when there is no magnetic core; the smaller the loss of the magnetic core, the higher the Q value.

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