By hvhipot 
HV Hipot Electric Co., Ltd. specializes in producing series resonance (also known as series resonance withstand voltage equipment). Next, we will share a brief introduction to series resonance with you.
At first, we simply believed that parallel power supply technology was driven by overlapping time. In order to prevent short circuits and protect the natural environment, reactor filtering should be used. Conversely, because reactor filtering was used, we could only choose to use overlapping area driving Series circuits are the opposite.
However, more often than not, their actual development situation is not what we think
In the case where the resonant circuit is determined (i.e. the values of l and c are determined), compare the series resonant circuit with the parallel characteristic impedance. The smaller the resistance in the series resonant control circuit, the higher the quality factor; The larger the value of the parallel resistance in the design of the parallel resonant drive circuit, the higher the quality factor. So in order to obtain a high Q value, it is generally necessary to connect them in series.
The resistance value in the resonant control circuit is very small, while the parallel resistance value in a resonant system circuit that requires parallel connection is relatively large.
When the internal resistance of the signal series resonance cannot be ignored, compared with the ideal excitation series resonance, the internal resistance function of the signal series resonance is:
Increase the equivalent resistance of the series resonant control circuit; Reduce the parallel equivalent resistance in the parallel resonant drive circuit. The result is a decrease in the quality of the resistor circuit. In order to prevent the Q value of the resonant control circuit from being excessively affected by the internal resistance of the signal series resonance, the series resonant system circuit with low resonant network impedance should only work with a low internal resistance signal series resonance, while the parallel resonant drive circuit with high resonant impedance should work with a high internal resistance signal series resonance design.
The above results explain well that the q-value of series resonance is highest at no load, and the q-value of parallel resonance is highest at full load. So HV Hipot Electric Co., Ltd. serial machine is not afraid of being fully loaded, the heavier the load, the safer it works
This is the theory of weak electricity, and it is still correct to apply it to the industrial induction heating industry.
Simply put, we are a series resonant circuit design that uses different voltage series resonances for power supply. Parallel resonant circuits can use current series resonances for power supply. That is, voltage series resonance induction heating power supply management must match the series resonant load circuit, while current series resonance induction heating power supply enterprises must match the parallel resonant load circuit. This is because of the initial matching technical measures between the power supply and the load.
Load matching scheme for series resonant circuit:
According to the resonant state, the equivalent impedance of a series resonant circuit is pure resistance and reaches its minimum, while the equivalent impedance of a parallel resonant circuit reaches its maximum in the resonant state.
Based on the analysis of working power management: a low internal resistance, voltage series resonance that can output signal power to its maximum, with the highest power utilization rate and lower load impedance, resulting in higher output power of natural reseries resonances On the other hand, the internal impedance is high, and the current series resonance maximizes its output power. The higher the load impedance, the higher the output power. The logical problem is that a voltage series resonance maintains a constant voltage, while the current can change with the load impedance; The current series resonance maintains a constant current, while the voltage changes with the load
The conclusion is to select a filtering circuit for initial load matching to maximize its output power.