DZW75-48/50(50II) high frequency rectifier filter circuit

The positive and negative alternating pulse voltage induced by the secondary of high-frequency transformer T is rectified by a full-wave rectifier composed of high-power high-frequency switching diodes V1 and V2, and then passes through the L-shaped inductor L1 and capacitors C2, C3, and C4. filter and Z1 power supply filter to obtain a 48V DC voltage output with high and low frequency noise at the output end that meets the specification requirements. The pulse width directly determines the level of the output voltage. The pulse width is wide and the output voltage is high. The pulse width is narrow and the output voltage is low. A voltmeter is connected to the output end to measure and display the output DC voltage. R2 is the bleeder resistor, FL is the shunt. An ammeter is connected across both ends of FL to measure and display the output current value of the rectifier. The voltage value at both ends of FL is also sent to the voltage stabilization, current limiting, and current sharing as the output current sampling signal. circuit. R1, C1 and V3 form an RCD absorption circuit to absorb the secondary overshoot voltage.