LC series resonant circuit design? 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.
Research on Circuit Theory
Resonance is a special physical phenomenon, and circuits with such properties are called resonant circuits. It not only has extremely high research value in theory, but also has a wide range of applications in engineering fields, such as electrical technology, radio technology, etc. However, resonance phenomenon in the power transmission and distribution system can disrupt the normal operation of the system, so it must be avoided.
In the field of pulse power technology, there are two common charging methods for primary energy storage capacitors: constant voltage charging and constant current charging. The former is based on a large volume power frequency transformer and often uses charging resistors to limit charging power, with the energy consumed by the charging resistors being 50%; The latter often uses a full bridge series resonant charging circuit to achieve constant current charging of capacitors through an "equal step" boosting method. It has the advantages of small size, high efficiency, high power density, and suitability for loads with wide range variations, making it an ideal capacitor charging power supply. The main units that make up the full bridge series resonant charging power supply include resonant inductors and capacitors, power devices, and pulse transformers. This article determines the design of these unit parameters through numerical calculation and simulation methods, and conducts full circuit simulation of the designed full bridge series resonant charging power supply based on Pspice circuit simulation software.
The series resonance experiment is a typical experiment in circuits. The experiment mainly draws the amplitude frequency characteristic curve and determines the circuit quality factor (Q value) by measuring the current (or output voltage across the resistor) in the RLC series circuit as a function of frequency.
In an RLC series circuit, when the frequency f of the input sine AC signal source changes, the inductive and capacitive reactance in the circuit also change, and the current in the circuit also changes with f. Taking the effective value U o of the voltage on resistor R as the response, when the effective value U i of the input voltage remains constant, under different frequency signal excitations, the U o value is measured. Then, with frequency f as the x-axis and U o/U i as the y-axis (since U i remains constant, U o can also be directly used as the y-axis), a smooth curve is drawn, which is the amplitude frequency characteristic curve, also known as the resonance curve, as shown in Figure 1.
Figure 1