According to the packaging methods of inductors, inductors are generally divided into two types, namely, patch inductors and plug-in inductors, and can be divided into wound type, laminated type, thin film type and woven type according to types.
The chip inductor is flat-bottomed, suitable for surface mounting, and has the characteristics of high cost, small size, high quality, high storage energy, high Q value and low resistance. Commonly used in computer display boards, notebook computers, automotive electronics, electronic toys, sports equipment and other micro products. Patch inductance can convert and store electrical energy before releasing. The AC signal can be isolated, and the filter can form a resonant circuit with capacitors and resistors.
Plug-in inductance has great advantages in cost, but it is large in size and wide in inductance range. Generally used for products with large built-in substrate size in product space, such as audio, home appliances and car DVD. There are many types of plug-in inductors, and the functions of different types of plug-in inductors are quite different. Examples are as follows.
Plug-in inductance-color ring inductance, which is usually used for storage elements, forms a liquid crystal tuning circuit in parallel with electrolytic capacitors. The basic working principle is charging, discharging, rectifying or vibrating, with tuning and frequency selection functions.
Plug-in inductance-I-shaped inductance, which is generally used for circuit matching and signal quality control, is connected with power supply and has the functions of choke, transformation, filtering and resonance.
Plug-in inductance-magnetic ring inductance is generally used in DC/DC step-down circuit, LC resonance circuit, or LC filter circuit with capacitor, which has the function of electromagnetic induction conversion.
