By hvhipot 
In electrical systems, many customers ask questions about the correlation between Q values, especially when Q values are required in frequency conversion series resonance testing equipment. Q values are affected by external factors such as voltage level, process structure, material properties, and have larger values. The smaller the allowable frequency offset in unit current variation, the higher the frequency selectivity. Q value is the main parameter for measuring inductance, and the calculation method is as follows: Q=energy carried by energy storage devices such as inductance and capacitance/loss power of resistance.
What is the impact of Q value on the frequency conversion series resonance test device?
The magnitude of Q value is influenced by a combination of factors such as manufacturing process, raw materials, and material properties. For example, for the same inductance, if other parameters are not changed and only the thickness of the winding is changed, the Q value of the inductance of the wire is higher than that of the wire. If silver is plated, the inductance of silver plated wire is higher than that of non silver plated wire, which is obviously influenced by the process structure and raw materials. For the Q value of the series resonant testing device, the higher the Q value, the smaller the loop loss and the higher the loop efficiency. The quality and performance of the product can be simply judged by the size of the Q value, rather than determining the final standard for the quality of the series resonant component. The improvement of the Q value is often limited by some factors, such as the DC resistance of the lead, the dielectric loss of the coil skeleton, the loss caused by the magnetic core and shielding, and the skin effect in high-frequency operation.
Is a higher Q value better?
So, when we purchase a variable frequency series resonance test device, should we measure the Q value? Actually, for customers who are not familiar with it, they may think that “a high Q value means a good product”; In fact, Q value is only a conceptual reference, and it cannot represent the only or absolute factor of performance. For example, a high Q value may cause phenomena such as inductor burnout, capacitor breakdown, and circuit oscillation. Some technological products have excellent materials and processes, but may find ways to reduce the Q value. Therefore, Q value is only a quality factor for measuring inductor performance. Therefore, when focusing on product quality, stability and innovation should be taken into account.