In a half-wave rectifier, a
single-phase transformer is typically used. The transformer is used to step up or step down the AC voltage to the desired level before it is rectified. Here's how it works:
- Step-down transformer: If the AC input voltage is too high, a step-down transformer is used to reduce the voltage to a more manageable level.
- Step-up transformer: If the AC input voltage is too low, a step-up transformer is used to increase the voltage to the required level.
The transformer's secondary winding is connected to the input of the rectifier, and the output of the rectifier provides a pulsed DC voltage.
In a half-wave rectifier, only one half of the AC waveform is used, and the transformer ensures the correct voltage is available for rectification.