Dc regulated power module adopts half bridge power inverter circuit
The DC regulated power module adopts half bridge power inverter circuit. As shown in Figure 1, the three-phase AC is filtered by the EMI filter, which greatly reduces the electromagnetic interference of the AC power input, while preventing the harmonic crosstalk generated by the switching power supply to the input power end. Then through the bridge rectifier circuit, filter circuit into DC voltage added between P and N two points. A non-inductive capacitor with small capacity and high voltage resistance is connected between P and N to play the role of high-frequency filtering. The half-bridge power conversion circuit is similar to the full-bridge power conversion circuit, except that the two power switching devices are replaced by two capacitors of equal capacity C1 and C2. In practical applications, in order to improve the capacity and voltage resistance of DC power supply, C1 and C2 are often composed of multiple equivalent capacitors in parallel. The capacity selection values of C1 and C2 should be as large as possible to reduce the ripple coefficient and low frequency oscillation of the output voltage. Due to the limitations on volume and weight, the values of C1 and C2 cannot be infinite. In order to make the ripple of the output voltage of the DC adjustable power supply meet the specified requirements,