How to judge the quality of inductor coil

Inductor coil in our daily life and popularized, it plays an important role in electronic equipment, but with the market of inductor coil mixed up, high quality inductor coil has become more and more difficult to find, how to judge the quality of inductor coil is good or bad? The stability of inductor coil is the degree to which the inductor coil parameters change with the change of environmental conditions. The inductor temperature coefficient αL is usually used to evaluate the stability of inductor coil, which represents the stability of inductance relative to the degree of tear The inductance temperature coefficient is mainly caused by the geometric deformation of inductance coil caused by the expansion of inductance coil after being heated. In order to improve the temperature stability of inductance coil, the inductor coil can be made by hot winding method, and the wire of the inductance coil can be connected with the current to make the wire hot and then wound the inductance coil In this way, the inductor coil can shrink after cooling and stay close to the skeleton, which is no longer prone to deformation after heating and correspondingly improves the stability. In addition to temperature, temperature will also cause changes in the parameters of the inductor coil. For example, the increase of humidity will increase the distributed capacitance and loss of the inductor coil, thus reducing the stability of the inductor coil Inductance coil in use, if there is no special measuring instrument, can use a multimeter for simple quality judgment, can first use a multimeter to measure the DC resistance of the inductor coil with the electric barrier, and then compare with the original determined resistance value or nominal resistance value If the resistance value is infinite, it can be determined that the inductor coil has a broken line, if the resistance value is much smaller, it can be determined that the inductor coil has a short circuit layer, the occurrence of these two situations, can be determined that the inductor coil has a quality problem, can no longer be used, if the resistance and the original determination or nominal resistance is not much different, it can be considered that the quality of the inductor coil is basically good Fu Ying electronic inductor coil has the following advantages: 1 machine is all special automatic winding machine, equipment repetition accuracy 0.001, peers may not be able to do 2 wire diameter can do 0.012mm. There is no other company in China that can do it. 3 Adopt lean production one-piece flow production mode, which can detect abnormal quality in time. 4 Coil raw material and wire brands are well-known suppliers in the industry, such as Yili Soler, Dahei and Sumitomo, with high quality stability.