How to improve the stability of the series resonance test device? Wuhan UHV specializes in the production of series resonance, with a wide range of product selection and professional electrical testing. To find series resonance, choose Wuhan UHV.
The series resonance test device is currently the best choice for us to conduct AC withstand voltage tests. Through continuous use, we have discovered how to better improve the method of the series resonance test device. Below, Wuhan UHV will share with you based on its own summary.
In the experiment, it was found that when the voltage rises close to the test voltage, the voltage rise speed is too fast and accompanied by significant voltage fluctuations, which can even cause voltage protection actions and require the test to be restarted, which is detrimental to equipment safety. But if the voltage protection value is set too high, it cannot effectively protect the tested equipment from overvoltage. According to the general frequency characteristic curve of R-L-C circuit:
There are two methods to change the frequency characteristic curve of the series resonance test device:
1. Choose to conduct the experiment at a deviation from the resonant frequency. We know that in order to reduce the capacity of the test transformer, the Q value should be chosen as large as possible But when the Q value is large, it is relatively slower when deviating from the resonant frequency. So, we can choose to deviate from the resonant frequency for boosting under the condition that the capacity of the test transformer allows, achieving the goal of reducing the speed of voltage rise.
2. Adjust the quality factor of the circuit. As shown in Figure Q=Uc/U=1/ω CR, in order to reduce the Q value, it is necessary to increase the circuit resistance. Therefore, in order to achieve the test voltage, the output capacity of the excitation transformer also needs to be increased. Therefore, when applying this method, it must be carried out under the condition of capacity allowance.
Mastering the methods to improve the stability of the series resonance test device is beneficial for us to better ensure the performance of the instrument and obtain more accurate measurement data during on-site testing.