How much DC voltage when 3phases are rectified

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In summary, the conversation discusses obtaining DC voltage through rectification using a bridge rectifier without a neutral wire. The question is posed about the amount of DC voltage that will be obtained with and without filtration, and the conversation ends with a request for the answer and a reminder to consider the peak voltage.
  • #1
prashsar
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Hi,Good day to all.
If 3 phases(230 volts phase to phase )are rectified (using a bridge rectifier: MEB00806)and no neutral is used ;
what amount of DC voltage will be obtained(with and without filtration)?
Thanking you.
Prashsar.
 
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  • #2
prashsar said:
Hi,Good day to all.
If 3 phases(230 volts phase to phase )are rectified (using a bridge rectifier: MEB00806)and no neutral is used ;
what amount of DC voltage will be obtained(with and without filtration)?
Thanking you.
Prashsar.

What do you think the answer is? If this is for school work, we cannot just give you the answer. Please post your thoughts and an attempt at the solutions.
 
  • #3
Draw the resultant waveform with no smoothing bearing in mind the 230V is RMS and the peak is higher.
 

FAQ: How much DC voltage when 3phases are rectified

What is the formula for calculating the DC voltage when 3 phases are rectified?

The formula for calculating the DC voltage when 3 phases are rectified is Vdc = Vphase * √3, where Vdc is the DC voltage, and Vphase is the voltage of each phase.

How does the rectification process affect the DC voltage in a 3 phase system?

The rectification process converts the AC voltage in each phase to a pulsating DC voltage. When the three phases are combined, the pulsating DC voltages overlap, resulting in a smoother DC voltage with a higher peak value.

What are the factors that can affect the DC voltage output from 3 phase rectifier?

The factors that can affect the DC voltage output from 3 phase rectifier include the voltage and frequency of the AC supply, the type of rectifier circuit used, the load connected to the rectifier, and any voltage drops or losses in the circuit.

Can the DC voltage output from a 3 phase rectifier be higher than the peak voltage of the AC supply?

Yes, the DC voltage output from a 3 phase rectifier can be higher than the peak voltage of the AC supply, as the rectification process can increase the peak voltage by √3 times. However, the actual DC voltage output will also depend on the factors mentioned in the previous question.

How can the DC voltage output from a 3 phase rectifier be regulated?

The DC voltage output from a 3 phase rectifier can be regulated by using voltage regulators, such as zener diodes or voltage regulating ICs, in the circuit. These components can adjust the output voltage to a desired level, regardless of any fluctuations in the input voltage or load changes.

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