220V line voltage first enters the EMI (transient filter circuit), passing through the primary EMI stage, which is composed of capacitors and ferrite inductors, before entering the secondary EMI stage, which consists of MOV varistors, ferrite coils, and fuse tubes. High-frequency and pulse disturbances in the current are filtered out by the "x" capacitors (metalized polyester capacitors), resulting in a AC current with no peak and low voltage. Avionics power supply
Low-voltage AC current enters the rectifying circuit, flows through the rectifier bridge (comprised of four diodes or a single component), and is rectified, producing a unidirectional pulsating direct current voltage, known as pulsating voltage.
Pulse voltage flows into the main capacitor, passing through polyester and ceramic capacitors to filter out high-frequency and pulse interference. It then travels through the main capacitor to prevent interference, resulting in a DC voltage with fluctuations, known as ripple DC output.
Wavy DC current is first fed into the transformer's primary side, then into the secondary side. It undergoes voltage stabilization in the transformer, followed by stabilization through an IC chip, voltage diodes, and a high-power Schottky rectifier bridge on the secondary side. After passing through polyester capacitors for filtering, a pure low-voltage DC power supply is obtained. 400HZ power supply.
