Wuhan UHV specializes in producingseries resonance (also known as power frequency withstand voltage test equipment). Next, we will share with you the principles of series resonance and series resonance circuits.

In an AC circuit with resistor R, inductor L, and capacitor C, the voltage at both ends of the circuit is generally different from the current phase in the resonant circuit. If we adjust the parameters or power frequency of circuit components (L or C), we can make their phases the same, and the entire circuit appears purely resistive. When a circuit reaches this state, it is called resonance. In the resonant state, the total impedance of the circuit reaches or approximates its maximum value. The purpose of studying resonance is to understand this objective phenomenon and fully utilize its characteristics in science and applied technology, while also preventing the harm it may cause. There are two types of circuit connections: series resonance and parallel resonance.

When in series resonance, the inductance voltage and capacitance voltage are of equal and different signs, that is, the inductance and capacitance absorb reactive power of equal and different signs, so that the reactive power absorbed by the circuit is 0; Both electric field energy and magnetic field energy are constantly changing, but they increase and decrease, compensating each other. This part of energy oscillates between the electric field and the magnetic field, and the total energy of the electromagnetic field in the entire circuit remains unchanged; The energy of the excitation supply circuit is fully converted into resistance heating. In order to maintain oscillation, the excitation must continuously supply energy to compensate for the heating consumption of the resistor. Compared with the total electromagnetic field energy in the circuit, the less energy is consumed per oscillation, and the better the quality of the circuit.

The principle ofseries resonanceand series resonance circuit

With the continuous establishment of communication test regulations for cables in various places and the increase of large capacity test samples in power systems, the application of series resonant power sources in power systems is becoming more and more widespread, requiring us to deepen our understanding of series resonance. We will discuss the principle of series resonance and the application of series resonant power sources on site with everyone.