Contents
Why we prefer bridge rectifier over full-wave rectifier for designing the DC power supply?
The main advantage of the bridge rectifier is that it produces almost double the output voltage as with the case of a full-wave rectifier using a center-tapped transformer. But this circuit doesn’t need a center-tapped transformer so it resembles a low-cost rectifier.
Which rectifier is used in DC power supply?
The simplest type of rectifier is made from a single diode. This type of rectifier is called a half-wave rectifier because it passes just half of the AC input voltage to the output. When the AC voltage is positive on the cathode side of the diode, the diode allows the current to pass through to the output.
What is a DC rectifier?
A rectifier is a device that converts an oscillating two-directional alternating current (AC) into a single-directional direct current (DC). Rectifiers can take a wide variety of physical forms, from vacuum tube diodes and crystal radio receivers to modern silicon-based designs.
What kind of rectifier is used in a bridge?
We can define bridge rectifiers as a type of full-wave rectifier that uses four or more diodes in a bridge circuit configuration to efficiently convert alternating (AC) current to a direct (DC) current. In the next few sections, let us learn more about its construction, working, and more.
What kind of diode is used for half wave rectifier?
The diode used in half wave rectification might be any of the 1N400X series of rectifying diodes. The DC load present at the end of the circuit is a resistor, therefore the current flowing through the load resistor is proportional to the voltage across the resistive load and this would be the same as the supply voltage.
How is the ripple voltage of a full wave rectifier determined?
The maximum ripple voltage present for a Full Wave Rectifier circuit is not only determined by the value of the smoothing capacitor but by the frequency and load current, and is calculated as: Where: I is the DC load current in amps, ƒ is the frequency of the ripple or twice the input frequency in Hertz, and C is the capacitance in Farads.
What makes the output waveform smooth in a DC rectifier?
Too low a capacitance value and the capacitor has little effect on the output waveform. But if the smoothing capacitor is sufficiently large enough (parallel capacitors can be used) and the load current is not too large, the output voltage will be almost as smooth as pure DC.