Solenoid valve copper coil 2w160-15.2w200-20.2w250-25uw-15ac220vdc24

Inductor coil is made by winding insulated wires (enameled wire, yarn-wrapped wire, conductor, etc.) close to each other. In AC circuit, the coil has the function of blocking the passage of AC current, but it has no effect on stable DC voltage (except DC resistance of the wire crime itself). Therefore, the coil can be used as a choke, transformer, cross connection, load, etc. in the AC circuit. When the coil and capacitor are matched, it can be used for tuning, filtering, frequency selection, frequency division, decoupling and so on.

The inductance coil is usually represented by the English letter "L" in the circuit, and the unit of inductance is "Henry", which is commonly represented by the English letter "H". The unit smaller than Heng is Milli Heng, which is expressed by the English letter mH; The smaller unit is micro-heng, which is represented by the English letter H. The relationship between them is: 1H=103mH=106uH.(1) Self-inductance and mutual inductance. When an alternating current passes through an inductive coil, an alternating magnetic field will be generated around the coil, which can pass through the coil and induce electromotive force in the coil. The magnitude of self-induced electromotive force is magnetic with the characteristics of the coil of magnetic flux, which is expressed by self-inductance coefficient. Electrical feeling. Electrical inductance is a quantity that represents the value of inductance, which is generally called inductance.

Self-inductance working principle of inductance coil: the direction of self-inductance electromotive force in the coil (inductance) will hinder the change of the original magnetic field, because the original magnetic field is generated by the current in the coil, and the self-inductance electric heat hinders the change of the current passing through the coil, which is the inductive reactance of the inductance, and its unit is ohm (). The size of the inductance is related to the current inductance of the coil and the AC frequency passing through the inductance coil. The greater the inductance, the greater the inductance it forms. Under the same inductance, the higher the frequency of AC current, the greater the inductance. Their relationship can be explained by the following formula: XL=2fL where XL is inductive reactance; F-frequency of current; L-inductance.