Understand the role of inductors and the functions and uses of inductors
- Categories:Industry Trends
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- Time of issue:2022-01-07 17:58
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(Summary description)Inductors are devices used to provide inductance, and various coils wound with insulated wires are called inductances. Its main function is to block AC and DC, block high frequency and pass low frequency, that is to say, high frequency signal will encounter great resistance when passing through the inductor coil, and it is difficult to pass, while the resistance presented by low frequency signal passing through it is relatively Small, that is, low-frequency signals can pass through it more easily. The resistance of the inductive coil to direct current is almost zero.
Understand the role of inductors and the functions and uses of inductors
(Summary description)Inductors are devices used to provide inductance, and various coils wound with insulated wires are called inductances. Its main function is to block AC and DC, block high frequency and pass low frequency, that is to say, high frequency signal will encounter great resistance when passing through the inductor coil, and it is difficult to pass, while the resistance presented by low frequency signal passing through it is relatively Small, that is, low-frequency signals can pass through it more easily. The resistance of the inductive coil to direct current is almost zero.
- Categories:Industry Trends
- Author:
- Origin:
- Time of issue:2022-01-07 17:58
- Views:
Information
Inductors are devices used to provide inductance, and various coils wound with insulated wires are called inductances. Its main function is to block AC and DC, block high frequency and pass low frequency, that is to say, high frequency signal will encounter great resistance when passing through the inductor coil, and it is difficult to pass, while the resistance presented by low frequency signal passing through it is relatively Small, that is, low-frequency signals can pass through it more easily. The resistance of the inductive coil to direct current is almost zero.
Classification of Inductors
1. According to the nature of the magnetic conductor: air core coil, ferrite coil, iron core coil, copper core coil.
2. Classification according to the nature of work: antenna coil, oscillator coil, choke coil, trap coil, deflection.
3. Classification by winding structure: single-layer coil, multi-layer coil, honeycomb coil. High Frequency Chip Ceramic Inductors
4. According to the form of inductance: fixed inductance coil, variable inductance coil.
5. Classification according to structural characteristics: magnetic core coil, variable inductance coil, color code inductance coil, non-magnetic core coil, etc.
In addition, it is often divided into high-frequency inductors and power inductors according to the operating frequency and overcurrent.
Basic Uses of Inductors
1. The function of the inductor is mainly to pass DC and block AC, and it mainly plays the role of filtering, oscillation, delay, notch and so on in the circuit. The inductive coil has a blocking effect on the alternating current, and the size of the blocking effect is called inductive reactance XL, and the unit is ohm. Its relationship with inductance L and AC frequency f is XL=2πfL. Inductors can be mainly divided into high-frequency choke coils and low-frequency choke coils. Tuning and frequency selection: the inductance coil and the capacitor are connected in parallel to form an LC tuning circuit. That is, the natural oscillation frequency f0 of the circuit is equal to the frequency f of the non-AC signal, then the inductive reactance and capacitive reactance of the loop are also equal, so the electromagnetic energy oscillates back and forth in the inductor and capacitor, which is the resonance phenomenon of the LC loop. During resonance, the inductive reactance and capacitive reactance of the circuit are equal and opposite, the inductive reactance of the total loop current is the smallest, and the current amount is the largest (referring to the AC signal with f="f0"). An AC signal of frequency f is selected.
2. The inductor also has the functions of filtering signals, filtering noise, stabilizing current and suppressing electromagnetic wave interference. In electronic equipment, some magnetic rings are often seen. This magnetic ring forms an inductor with the connecting cable (the wire in the cable is wound around the magnetic ring for several turns of inductance coils). It is a commonly used anti-interference component in electronic circuits. , High-frequency noise has a good shielding effect, so it is called absorption magnetic ring, usually made of ferrite material, also known as ferrite magnetic ring (referred to as magnetic ring). The magnetic ring has different impedance characteristics at different frequencies. The impedance is very small at low frequencies, and the impedance of the magnetic ring increases sharply when the signal frequency increases.
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Understand the role of inductors and the functions and uses of inductors
Inductors are devices used to provide inductance, and various coils wound with insulated wires are called inductances. Its main function is to block AC and DC, block high frequency and pass low frequency, that is to say, high frequency signal will encounter great resistance when passing through the inductor coil, and it is difficult to pass, while the resistance presented by low frequency signal passing through it is relatively Small, that is, low-frequency signals can pass through it more easily. The resistance of the inductive coil to direct current is almost zero.
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