2024年4月6日发(作者：)

三相交流转直流电流计算

## English Answer:

Three-Phase AC to DC Current Calculation.

In a three-phase AC system, the instantaneous voltage

and current waveforms are sinusoidal and have a phase

difference of 120 degrees. The RMS (Root Mean Square)

voltage and current values are used for calculations.

To convert three-phase AC current to DC current, a

rectifier is used. A rectifier is a device that allows

current to flow in only one direction. The most common type

of rectifier is a diode rectifier.

The output of a three-phase diode rectifier is a

pulsating DC voltage. The pulsations can be smoothed out

using a filter, such as a capacitor or an inductor.

The average DC voltage output of a three-phase diode

rectifier is:

V_dc = (3 V_rms) / √3。

where:

V_dc is the average DC voltage output.

V_rms is the RMS voltage of each phase.

The DC current output of a three-phase diode rectifier

is:

I_dc = V_dc / R.

where:

I_dc is the DC current output.

R is the load resistance.

Example: