1、 Differences in usage frequency
The difference between low-frequency choke and high-frequency toroidal choke mainly lies in the use of frequency. Low frequency chokes usually refer to chokes used in circuits with operating frequencies below a few thousand kilohertz (kHz), while high frequency chokes refer to chokes used in frequencies above a few thousand kilohertz (kHz). Usually, the operating frequency of low-frequency chokes ranges from several hundred hertz to several thousand kilohertz, while the operating frequency of high-frequency chokes can reach several megahertz (MHz).
2、 Differences in inductance values
Inductance refers to the ability of a coil in a circuit to store electrical energy through the action of a magnetic field. There are also significant differences in inductance values between low-frequency and high-frequency toroidal chokes. The inductance value of low-frequency chokes is usually much larger than that of high-frequency chokes, usually within a few hundred microohms（ μ H) Between a few milliohms (mH), while the inductance value of high-frequency chokes is relatively small, usually within a few milliohms（ μ H) Up to a few hundred weiheng（ μ H) Between.
3、 Different application scenarios
According to the different frequency and inductance values used, low-frequency and high-frequency chokes also differ in application scenarios. Low frequency chokes are commonly used in DC or low-frequency AC circuits, such as lighting power supplies, transformers, electronic power supplies, etc. High frequency chokes are often used in high-frequency AC circuits, such as radio transceiver circuits, RF power amplifiers, frequency converters, etc.
4、Differences in structure and materials
5、The structure and materials of low-frequency and high-frequency chokes are also different. Low frequency chokes typically use thick wires and large diameter iron cores to improve inductance and flow capacity. The high-frequency toroidal choke coil uses thin wires and small diameter iron cores to reduce impedance and loss, and improve work efficiency.
6、 Summary
Low frequency choke and high frequency toroidal choke are two common electronic components, and their main differences lie in their frequency of use and application scenarios. Low frequency chokes are usually used in DC or low-frequency AC circuits, while high-frequency chokes are mostly used in high-frequency AC circuits. In addition, the inductance value of low-frequency chokes is relatively large, while the inductance value of high-frequency chokes is relatively small, and their structures and materials are also different.