Main parameters of inductors
Main parameters of inductors
The main parameters of inductors include inductance, permissible deviation, quality factor, sectional capacitance and rated current.
Inductance, also known as self inductance, is the physical quantity indicating the inductance of inductors.
The inductance of the inductor mainly depends on the number of turns (winding number), winding mode, magnetic core material and magnetic core. Usually, the larger the number of coils, the greater the density of the coils, the greater the inductance. The core coil is larger than the coil without magnetic core. The greater the permeability of the core, the greater the inductance.
The basic unit of inductance is Henry, which is represented by the letter "H". The commonly used units are MH and H, and their relations are: 1H = 1000 MH, 1MH= 1000 GH. 2. Allowable deviation allowable deviation is the permissible error between the inductor's nominal inductance and the actual inductance. Inductors in oscillatory or filter circuits require higher accuracy, with tolerances ranging from 0.2% to 0.5%, while coils used for coupling and high-frequency choke coils have low accuracy, with tolerances ranging from 10% to 15%.
Quality factor quality factor, also known as Q value or excellent value, is the main parameter to measure the quality of inductors. It refers to inductance and inductance of inductors operating at alternating voltages of one frequency.
The ratio of loss resistance to radio assembly process. The higher the Q value of the inductor, the lower the loss, the higher the efficiency of the inductor, the higher the quality factor of the inductor, which is related to the DC resistance of the coil wire, the dielectric loss of the coil skeleton and the loss caused by the iron core and shield. 4 the capacitance of the distributed capacitor is the capacitance between the turns of the coil and the capacitance between the coil and the core. The smaller the distributed capacitance of the inductor, the better the stability. Rated current refers to the maximum allowable current value of inductors during normal operation. If the working current exceeds the rated current, the inductor will change its performance parameters due to heat, and even burn out due to overcurrent.
The sensor transfers the multimeter to the ohm block and detects both ends of the sensor.
If the resistance value of the test inductor is zero, there is a short-circuit fault inside it.
If the measurement of the DC resistance of the inductor is directly related to the coil diameter and the number of coils in the inductor coil, the measurement of the color code inductance can be considered a positive task as long as the resistance value can be MEAs. It's well done.