Inductor is an element that can convert electrical energy into magnetic energy and store it. The structure of the inductor is similar to that of a transformer, but it has only one winding. The inductor has a certain inductance, it only hinders the change of current. If the inductor is in a state where no current is flowing, it will try to block the current from flowing through it when the circuit is on; if the inductor is in a state where current is flowing, it will try to maintain the current when the circuit is off. Inductors are also called chokes, reactors, and dynamic reactors.
SMT proofing and trial production inductors are mainly used in various electronic vital parts, including electrical appliances, power supplies, electronic precision parts, electronic structural parts, automotive electronic systems, etc.
Two types of inductance measuring instruments: RLC measurement (resistance, inductance, and capacitance can be measured) and inductance measuring instrument.
SMT Proofing Trial ProductionInductance measurement: no-load measurement (theoretical value) and measurement in the actual circuit (actual value). Because the actual circuit used in the inductor is too much, it is difficult to classify. Only the measurement under no-load conditions is explained. Inductance measurement steps (RLC measurement):
1. Familiar with the operating rules of the instrument (instructions for use) and precautions.
2. Turn on the power and prepare for 15-30 minutes.
3. Select L file and select to measure inductance.
4. Clamp the two clamps to each other and reset to zero.
5. Clamp the two clamps to the two ends of the inductor, read the value and record the inductance.
6. Repeat steps 4 and 5 to record the measured value. There must be 5-8 data.
7.Compare several measured values: if the difference is not large (0.2μH), take the average value and remember the theoretical value of the inductance; if the difference is too large (0.3μH), repeat steps 2-step 6 until you get the theoretical value of the inductance value.
The inductance parameters that can be measured by different instruments are somewhat different. Therefore, before doing any measurement, be familiar with the measuring instrument used, understand what the instrument can do, and then do it according to the operating instructions it gives you.