Chopper Circuit. If these semiconductor devices are arranged appropriately a chopper can work in any of the four quadrants. In the case of the chopper circuit refer figure named chopper circuit shown in beginning of this article v 0 or the average output voltage is less than the input voltage v s so this type of chopper is called a step down chopper.
Typically a braking circuit sometimes known as the chopper circuit is controlled by the drive and consists of a power transistor and resistor s that are connected across the drive s dc bus. For a step up chopper we can obtain an average output voltage v 0 greater than input voltage. Similar to the transformers of the ac circuit choppers are used to step up and step down the dc power.
It is nothing but a high speed switch which connects and disconnects the load from source at a high rate to get variable or chopped voltage at the output.
The period of time for which the power switch stays on or off is referred to as the chopper s on and off state times respectively. In power electronics applications since the switching element is either fully on or fully off its losses are low and the circuit can provide. Chopper is a basically static power electronics device which converts fixed dc voltage power to variable dc voltage or power. Typically a braking circuit sometimes known as the chopper circuit is controlled by the drive and consists of a power transistor and resistor s that are connected across the drive s dc bus.
