Single Phase Full Wave Controlled Rectifier with R Load | New Topic 2025

In this note, we are going to know about Single Phase Full Wave Controlled Rectifier with R Load. Welcome to Poly Notes Hub, a leading destination for engineering notes for diploma and degree engineering students.

Author Name: Arun Paul.

What is Single Phase Full Wave Controlled Rectifier with R Load?

A single phase full wave Controlled Rectifier with R load (resistive load) is a type of rectifier circuit that uses two pairs of diodes or thyristors to convert alternating current (AC) voltage to direct current (DC). It is commonly used in DC motor drives, battery charging systems, and other applications that require regulated DC output.

Circuit Diagram of Single Phase Full Wave Controlled Rectifier with R Load

Here is the circuit details of Single Phase Full Wave Controlled Rectifier with R Load –

1. The circuit consists of 4 thyristors or SCRs or Silicon Controlled Rectifiers (T1, T2, T3, and T4) arranged in a bridge configuration.
2. An AC voltage source which is connected to the input of the circuit.
3. The load resistor (R) is connected across the output.

Working Principle of Single Phase Full Wave Controlled Rectifier with R Load

The operation of the Single Phase Full Wave Controlled Rectifier with R Load is based on triggering the thyristors in pairs during each half-cycle of the AC supply. The waveform is divided into two modes: positive half-cycle and negative half-cycle.

1. For Positive Half Cycle
   • When the AC voltage is positive, thyristors T1 and T2 are triggered.
   • These thyristors conduct, and the load current flows through T1, the load resistor, and T2.
   • The output voltage is equal to the input AC voltage.
2. For Negative Half Cycle
   • When the AC voltage is negative, thyristors T3 and T4 are triggered.
   • The current flows through T3, the load resistor, and T4 in the opposite direction.
   • Again, the output voltage is positive because the load is resistive.

Advantages of Single Phase Full Wave Controlled Rectifier with R Load

Here are the advantages of Single Phase Full Wave Rectifier with R Load –

1. It provides a fully controlled DC output.
2. In this circuit or by this circuit bidirectional control of power flow is possible.
3. This circuit improved efficiency compared to half wave Rectifier or converter.

Applications of Single Phase Full Wave Controlled Rectifier with R Load

Here are the applications of Single Phase Full Wave Rectifier with R Load –

1. Used in Battery Charging System.
2. Used in Motor Drives.
3. Used in Heating Control System, Electroplating Purposes, and in Welding Equipment as well.