Have you ever understood the function and purpose of inductors?

An inductor is a component 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, and it only prevents the current from changing. If there is no current through the inductor, it prevents current from flowing through it; if there is current through it, it will try to maintain the current when the circuit is disconnected.

Inductors are mainly used in the circuit to filter, oscillate, delay, trap, etc., as well as filter signals, filter noise, stabilize current, and suppress electromagnetic interference. The most common role of inductance in a circuit is to form an LC filter circuit together with a capacitor. Capacitors have the characteristics of "blocking DC and blocking AC", while inductors have the function of "blocking DC and blocking AC". If the direct current accompanied by many interference signals is passed through the LC filter circuit,

Then, the AC interference signal will be consumed by the capacitor as heat energy; when the pure DC current passes through the inductor, the AC interference signal is also turned into magnetic induction and heat energy. The higher frequency is the most likely to be impedance by the inductor. Can suppress the higher frequency interference signal. Inductors have the characteristic of preventing alternating current from passing through and allowing direct current to pass smoothly. The higher the frequency, the greater the coil impedance. Therefore, the main function of the inductor is to isolate and filter AC signals or form a resonant circuit with capacitors and resistors.

High-precision power meters have become an indispensable tool for testing and certification of home appliances. The PA310 power meter of ZLG Zhiyuan Electronics has a basic power accuracy of 0.1%, three channels can complete the test of three-phase alternating current, and the highest sampling rate of 500KS/s, 300KHz bandwidth, standard synchronous measurement of harmonics (up to 50 times) and Total harmonic distortion (THD), in line with the IEC61000-4-7 harmonic measurement standard, can solve the current inaccurate testing caused by harmonics in the variable frequency home appliance industry;

Energy efficiency label, also known as energy efficiency label, is an accessory to energy-consuming products and indicates an information label for performance indicators such as product energy efficiency levels. The purpose is to provide users and consumers with necessary information for purchasing decisions, and to guide and help consumers Choose energy-efficient and energy-saving products. In the process of calculating the energy efficiency ratio, the test of the actual input power of the air conditioner is particularly important. At present, most manufacturers’ first choice for power measurement in the home appliance industry is the power meter, which can complete the test of basic functions such as voltage, current, power, and energy consumption. It can also perform preliminary analysis and detection of harmonics on the input terminal voltage and current.

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