By hvhipot 
HV Hipot Electric Co., Ltd. specializes in producing series resonance (also known as variable frequency series resonance device). Next, we will share with you the explanation of series resonance.
Basic Overview of Frequency Conversion Resonance
The English name: Frequency Series Resonance. Frequency series resonance is composed of an isolation transformer, a frequency and voltage regulating power supply, an excitation transformer, a reactor, and a capacitive voltage divider. The capacitor and reactor of the test sample form a frequency conversion resonant network connection management method; The voltage divider is connected in parallel to the test sample to measure the resonant operating voltage on the test sample and provide an overvoltage protection environmental signal; The frequency modulation power data output is coupled to the series resonant circuit through an excitation transformer, providing some theoretical excitation power for frequency conversion resonance.
Overview
The resonance problem of the frequency conversion system can mainly be used for the power engineering cables of 6kV-500kV cross-linked rubber, the power frequency withstand voltage performance test of 6kV-500kV transformers, the AC withstand voltage strength test of GIS and SF6 switches, the AC withstand voltage capacity test of generators, and the AC withstand voltage test of other national power control high-voltage technical equipment such as busbars, bushings, and transformers.
principle
As we all know, when the loop frequency F=1/2 π√ LC, the loop resonates, and the voltage tested at this time is Q times the output voltage of the excitation speed. Q is the influencing factor of system learning quality, which is the resonance multiple of voltage, generally ranging from tens to hundreds or more. Firstly, by adjusting the output signal frequency of the variable frequency power supply, the circuit can undergo series resonance. Then, under the condition of circuit resonance, the input and output voltage of the variable frequency power supply can be adjusted to increase the test value of the sample voltage. Due to the resonance of the circuit, the output voltage of the variable frequency power supply is relatively low, which can generate a higher test voltage on the CX test.