Specific Application Scenarios Are:
1. Filtering: Through-hole inductors are often used in power supply filters. Together with capacitors, they form a π-type filter circuit, which can effectively filter out AC interference signals and ensure the stability and reliability of the power supply.
2. Tuning: In radios and other equipment, through-hole inductors are used to match the tuning coil with the resonant coil of the intermediate frequency transformer to achieve the tuning function of the circuit.
3. Oscillation: Through-hole inductors and capacitors are connected in parallel to form an LC oscillation circuit, which generates oscillation signals and is widely used in various electronic devices.
4. Energy Storage: Through-hole inductors can store electrical energy and release energy when needed. They are often used in switching power supplies and energy storage circuits.
Advantages and Disadvantages of Through Hole Inductors
Advantages:
High Mechanical Strength: Since the pins pass through the circuit board and are soldered, through-hole inductors have strong mechanical stability and can resist vibration and shock.
Good Heat Dissipation Performance: Longer pins can provide additional heat dissipation paths, which helps to dissipate heat to the circuit board and its surroundings.
Easy to Repair and Replace: Since the longer pins are easy to solder and remove, through-hole inductors are more convenient when repairing and replacing.
Disadvantages:
Large Space: Compared with surface mount components, through-hole inductors occupy more circuit board space.
Higher Cost: The production process is relatively complex and the price is higher.
The Application of Through Hole Inductors in Electrical Appliances Mainly Includes the Following Aspects
1. Circuit Tuning: Through-hole inductors are often used in tuning coils in radios and other equipment and resonant coils in intermediate-frequency transformers to help adjust the circuit’s frequency response and ensure that the device can receive signals of a specific frequency.
2. Oscillation Circuit: In the oscillation circuit, through-hole inductors, as oscillation coils, together with capacitors form an LC oscillation circuit to generate oscillation signals of a specific frequency, which are widely used in various electronic devices.
3. Power Supply Filtering: Through-hole inductors are often used in power supply filters to protect circuits from interference by preventing high-frequency noise from entering the power supply system. The working principle is to allow direct current to pass and block alternating current through the inductance to block the AC signal.
4. Frequency Selection: In bandpass and bandstop filters, through-hole inductors perform frequency selection through resonance characteristics to help the circuit filter out unwanted frequency components and ensure the purity of the signal.
Through Hole Inductors Have the Following Characteristics:
High Mechanical Strength: Since the pins pass through the circuit board and are soldered, they have strong mechanical stability and can resist vibration and shock.
Good Heat Dissipation Performance: Longer pins can provide additional heat dissipation paths, which help to dissipate the heat generated by the inductor to the circuit board and its surroundings.
Easy to Repair and Replace: Longer pins make welding and disassembly easier, and easy to repair and replace.
Specific Application Examples
In power circuits, through-hole inductors are often used to build filters to filter out high-frequency interference signals on power lines and ensure the purity and stability of the power supply. In communication equipment, through-hole inductors are used for filtering, shielding and adjusting high-frequency signals to ensure the clarity and accuracy of communication signals. In addition, through hole inductors are also widely used in power electronic equipment such as inverters, rectifiers, and converters to achieve the conversion and control of electrical energy.
