How to rectify three-phase power in communication base stations

What is 3 phase rectification?

We have seen in this tutorial that three-phase rectification is the process of converting a 3-phase AC supply into a pulsating DC voltage as rectification converts the input power supply of a sinusoidal voltage and frequency into a fixed voltage DC power. Thus power rectification changes an alternating supply into a unidirectional supply.

How does a telecom rectifier work?

Telecom rectifiers convert AC to DC power at the base of macro towers so that DC power can be sent to the DC devices that need it at the top. Traditional telecommunications equipment generally requires 48V DC input power.

What is a boost stage in a telecom rectifier?

The boost stage often exists in the anatomy of a telecom rectifier as a byproduct of active power factor correction (PFC). Power factor needs to be corrected because there are typically reactive power losses along cables that result in voltage drop.

What is a Class 4 Telecom rectifier?

Class 4 Telecom Rectifiers Rectifiers, including traditional telecom rectifiers, are essentially AC to DC power converters. AC (alternating current) power needs to be converted into DC (direct current) power when powering DC devices (such as 5G antennas for both macrocells and small cells).

Why is a 3-phase supply used in a rectification circuit?

Since a 3-phase supply has a fixed voltage and frequency it can be used by a rectification circuit to produce a fixed voltage DC power which can then be filtered resulting in an output DC voltage with less ripple compared to a single-phase rectifying circuit.

Where does conduction occur in a 3-phase power rectifier?

In 3-phase power rectifiers, conduction always occurs in the most positive diode and the corresponding most negative diode. Thus as the three phases rotate across the rectifier terminals, conduction is passed from diode to diode.