# 3 Phase Rectifier Pdf

This is all about the bridge rectifier theory its types, circuit and working principles. Since the diode is a unidirectional device that allows the current flow in one direction only. Filtering is normally performed with one or more capacitors attached across the load, as you can observe in the below figure wherein smoothing of wave is performed.

## Bridge Rectifier Circuit Theory with Working Operation

This capacitor rating also depends on the output voltage. The drawback of this arrangement is high ripple factor. The bridge rectifier circuit diagram consists of various stages of devices like transformer, Diode Bridge, filtering and regulators.

The ripple frequency in case of three phase rectifiers is three times of the supply frequency. We can observe that in both the cases, the load current direction is same, i. These can be again uncontrolled or controlled rectifiers depending on the circuit components such as diodes, thyristors, and so on. They can be constructed with four or more diodes or any other controlled solid state switches.

This neutral point provides the negative terminal to the load and is earthed. So this type of rectifier is used in constant or fixed power supplies. As we discussed above, a single-phase bridge rectifier consists of four diodes and this configuration is connected across the load.

## Types of Bridge Rectifiers

Some of these types of rectifiers are described below. Therefore, if in place of single phase transformer we use three phase transformer the ripple factor can be reduced up to a large extent. The first stage of the circuit is a transformer which is a step-down type that changes the amplitude of the input voltage. Bridge rectifiers are mainly classified into single and three phase rectifiers.

The same operation is applicable for different bridge rectifiers, but in case of controlled rectifiers thyristors triggering is necessary to drive the current to load. The anode terminal of the diode is connected to the secondary winding of the transformer.

In three phase full wave rectifier six diodes are used. And the three phases of the transformer is connected together at a common point called neutral. In three phase half wave rectifier, how to decrypt pdf files protected with user passwords three diodes are connected to each of the three phase of secondary winding of the transformer. The main advantage of bridge rectifier is that it produces almost double the output voltage as with the case of a full wave rectifier using center-tapped transformer.

For any assistance or for customization of projects please email us on team elprocus. We appreciate you for your keen attention and focus on this article. But after this smoothing process the rectifier voltage falls to zero at some point.