No matter what kind of testing instrument you purchase, you need to understand its advantages in order to determine if you can choose it. Below, we will talk about the advantages of series resonance (also known as variable frequency series resonance)? The following points are very worth understanding.
Firstly, the installation method is simple. If you purchase a testing instrument yourself, it will require a lot of time and effort during the installation process, which may lead to many drawbacks. For example, if the data is not adjusted or set properly, it will directly affect the subsequent testing of the equipment. The entire installation method of series resonance is particularly simple, and the manufacturer can provide very comprehensive installation guidance to explain it clearly, so that the staff can come and help everyone install it. Therefore, we can understand the advantages of series resonance.
Secondly, its detection speed is very fast, and no factory wants to purchase their own testing equipment. It takes a lot of time to detect what the problem is with the equipment and provide a very clear answer. As long as it is installed, it can immediately enter the detection and detect many different devices at the same time. Accurate data can be seen from the LED display screen, and software analysis can also understand what problems the device has and how to solve them.
Thirdly, the power supply has low voltage requirements and can output high voltage or high current. This is the most prominent and important advantage of series resonance.
Principle: At the resonant frequency, the inductive impedance (XL) and capacitive impedance (XC) are equal and cancel each other out, and the total impedance of the circuit reaches its minimum value, which is equal to the loop resistance (Z=R). At this point, the current in the circuit reaches its maximum value (I=U/R).
effect:
Voltage across inductor: UL=I * XL=(U/R) * XL
Voltage across capacitor: UC=I * XC=(U/R) * XC
Key point: Due to the high current I during resonance, and the large values of XL and XC themselves, UL and UC will be much higher than the power supply voltage U. This multiple is the quality factor Q of the circuit (Q=XL/R=XC/R). That is, UL=UC=Q * U.
For example, if the Q value of a series resonant circuit is 50 and the power supply voltage is 100V, then the voltage across the inductor and capacitor can both reach 50 * 100V=5000V. This means that a 100V low-voltage power supply can generate a 5000V high voltage on the load, greatly reducing the requirements and costs of power equipment.
Application: The high-voltage series resonance test device utilizes this principle to test cables GIS, The voltage resistance performance of large power equipment such as transformers.
Therefore, we can understand the advantages of series resonance, and of course, after understanding it, we also need to consider which series resonance to purchase and which brand of series resonance. Only after considering these details can we ensure that there will be no problems or losses when choosing to use it.