# Output load voltages in Bridge Rectifier circuit

• Engineering
• Mongster
Yes, that is correct. In summary, the function of capacitors in a Bridge Rectifier circuit is to remove pulsation of the DC output, which results in higher output load voltages compared to a circuit without a capacitor. This can be seen in plots of the waveforms for both cases.
Mongster

## Homework Statement

It appears to me that output load voltages in a Bridge Rectifier circuit with capacitor always seem to be greater than that without a capacitor.
I'm aware that the function of the capacitors connected across output in rectifiers is to remove pulsation of the DC output, so does it mean that a capacitor in place can also mean that the output load voltages are higher?

## Homework Equations

1.Vrms= Vp x 0.707
2. Vavg= Vp x 0.637

## The Attempt at a Solution

Mongster said:
It appears to me that output load voltages in a Bridge Rectifier circuit with capacitor always seem to be greater than that without a capacitor.
Can you show us plots or other information that makes you think this?

Typical Full Wave Rectifier + Capacitor waveform:

https://www.sonoma.edu/users/m/marivani/es231/units/images/fig05_1.png

## 1. What is a bridge rectifier circuit?

A bridge rectifier is an electronic circuit that converts alternating current (AC) into direct current (DC). It is commonly used in power supplies and electronic devices to provide a steady and stable output voltage.

## 2. How does a bridge rectifier circuit work?

A bridge rectifier circuit uses four diodes arranged in a specific configuration to convert AC to DC. The AC input is connected to the two outer diodes, and the DC output is taken from the two inner diodes. This allows for the AC input to be rectified and the negative portion of the signal to become positive, resulting in a smooth DC output.

## 3. What are the different types of bridge rectifier circuits?

The most common types of bridge rectifiers are the full-wave bridge rectifier and the half-wave bridge rectifier. The full-wave bridge rectifier uses four diodes, while the half-wave bridge rectifier uses only two. There are also variations of these circuits, such as the center-tapped rectifier and the full-wave bridge rectifier with a capacitor filter.

## 4. How is the output load voltage calculated in a bridge rectifier circuit?

The output load voltage in a bridge rectifier circuit can be calculated using the formula Vout = Vmax - Vd, where Vmax is the maximum AC input voltage and Vd is the voltage drop across the diodes. The voltage drop across each diode is typically around 0.7V, so for a full-wave bridge rectifier, the output voltage will be approximately 1.4V less than the maximum input voltage.

## 5. What factors can affect the output load voltage in a bridge rectifier circuit?

The output load voltage in a bridge rectifier circuit can be affected by various factors, such as the quality and type of diodes used, the load resistance, and the AC input voltage. Temperature can also affect the output voltage, as diodes tend to have a slightly higher voltage drop at higher temperatures.

• Engineering and Comp Sci Homework Help
Replies
8
Views
4K
• Engineering and Comp Sci Homework Help
Replies
7
Views
2K
• Engineering and Comp Sci Homework Help
Replies
2
Views
2K
• Engineering and Comp Sci Homework Help
Replies
14
Views
2K
• Engineering and Comp Sci Homework Help
Replies
4
Views
1K
• Electrical Engineering
Replies
10
Views
2K
• Engineering and Comp Sci Homework Help
Replies
1
Views
1K
• Engineering and Comp Sci Homework Help
Replies
11
Views
5K
• Electrical Engineering
Replies
7
Views
955
• Electrical Engineering
Replies
8
Views
1K