LCRmätning

LCRmätning, often referred to as LCR measurement, is a process used to determine the inductance (L), capacitance (C), and resistance (R) of an electronic component or circuit. This is typically achieved using an LCR meter, a specialized instrument designed for this purpose. LCR meters apply an alternating current (AC) signal of a specific frequency and amplitude to the component under test. By measuring the voltage across and current through the component, and considering the phase difference between them, the meter can calculate the impedance. From the impedance, the values of inductance, capacitance, and resistance can be derived.

The frequency of the AC signal is a critical parameter in LCR measurements, as the impedance of inductive and capacitive components is frequency-dependent. Different frequencies are used to characterize components under various operating conditions or to identify specific properties. For example, measuring at a higher frequency might reveal parasitic inductance in a capacitor. Resistance measurements, while also influenced by AC effects like skin effect at very high frequencies, are generally less sensitive to frequency than inductance and capacitance.

LCR measurements are essential for quality control, component characterization, and troubleshooting in electronics manufacturing and development. They help ensure that components meet their specifications, verify circuit performance, and diagnose faults by identifying components that have drifted out of their expected L, C, or R values. The accuracy of an LCR meter and the proper selection of measurement frequency are crucial for obtaining reliable results.