Answer to Question #260255 in Electrical Engineering for william

Question

how to calculate the maximum load voltage of 3 phase halve and full wave rectifier

Answer 1

If the input voltage of three phase rectifier is ‘V ‘ Volts(RMS). The rectifier output DC voltage can be expressed by following formula.

VDC = 1.35 Vrms

Where, Vrms - Input AC suuply RMS Voltage

For example the input voltage of three phase rectifier is 440 volts(rms)

VDC= 1.35 x Vrms

VDC = 1.35 x 400

VDC = 540 VDC