Working principle of communication inverter

A communication inverter is a device that converts 220V power frequency AC power into a regulated output DC voltage. It requires four steps: voltage transformation, rectification, filtering, and voltage stabilization to complete. Each link has its role, and the inverter manufacturer will provide a detailed introduction below:
1. Rectification and filtering circuit: The rectification circuit converts the AC voltage Ui into a pulsating DC voltage, and then filters out the larger ripple components through the filtering circuit to output the DC voltage U1 with smaller ripple. Common rectification and filtering circuits include full wave rectification and filtering, bridge rectification and filtering, etc.
2. Power transformer: A step-down transformer that converts the 220V AC voltage of the power grid into a suitable AC voltage and sends it to the rectifier circuit. The transformation ratio of the transformer is determined by the secondary voltage of the transformer.
3. Voltage stabilizing circuit: The function of a voltage stabilizing circuit is to stabilize the output DC voltage and not change with changes in AC grid voltage and load. The commonly used integrated voltage regulators include fixed three terminal voltage regulators and adjustable three terminal voltage regulators.
4. Filter circuit: Most of the AC component in the output voltage of the rectifier circuit can be filtered out, resulting in a relatively smooth DC voltage. Each filter capacitor C meets the requirements of RL-C=3~5T/2 or where T is the input AC signal period, and RL is the equivalent load resistance of the rectifier filter circuit.