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The Role of Inductor and Capacitor in Series

The basic function of two components in the circuit: the basic function of the inductor is “straight blocking”, that is, the DC can pass smoothly, but the AC signal is not so convenient. The higher the frequency of the AC signal, the ability of the inductor to block it. The bigger the function is; the basic function of the capacitor is “straight through”, that is, the DC current cannot pass, and the AC signal can pass, the higher the frequency, the easier it is to pass. So in practical circuit applications, they use their different basic electrical properties.

Inductance (inductor coil) is an electromagnetic induction component that is wound with insulated wires (such as enameled wire, yarn wrapped wire, etc.) and is also one of the commonly used components in electronic circuits. The inductor is a set of series coaxial coils wound on an insulating skeleton or a core or a core by an enameled wire, a yarn wrapped wire or a plasticized wire. It is represented by a letter “L” in the circuit, and the main function is to communicate with each other. The signal is isolated, filtered, or combined with capacitors, resistors, etc. to form a resonant circuit.

Inductance is a physical quantity that measures the ability of a coil to generate electromagnetic induction. When the coil is supplied with an unsteady current, a varying magnetic field is generated around it. The greater the power supplied to the coil, the higher the strength of the excited magnetic field, and vice versa (before the magnetic induction reaches saturation).

Inductor coil and capacitor in series

The series inductance on the compensation capacitor mainly has the following effects:

  • 1) Avoid harmonic resonance points to avoid harmonic amplification and capacitor overcurrent damage;
  • 2) Limiting the inrush of the input;
  • 3) Deliberately adjust the resonance point to the harmonic frequency to filter out harmonics.
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