Working of Step-Down Chopper with R Load
The circuit configuration depicts a step-down chopper connected to a resistive load with a fixed DC supply . In this circuit ,the chopper is situated between the resistive load and the source, receives power from the fixed DC supply and delivers stepped-down DC output to the load . When the chopper is switched ON , the load becomes part of the circuit , and the load voltage (VL) mirrors the source voltage(Vdc) i.e..
VL=Vdc
During the chopper’s ON state (from time t=0 to δT) ,the load voltage VL equals the source voltage Vdc , and the load current IL aligns with the load voltage. At t= δT , when the chopper switches OFF , both load voltage and load current drop to zero. Given the resistive nature of the load, the load current mirrors the load voltage but with a reduced magnitude.
This is a cyclic process repeats as the chopper is turned ON again at t=T. The ON duration , δT determines the output characteristics, offering control over the average load voltage .This step-down chopper configuration proves vital in applications such as power supplies and motor control , enabling efficient regulation of voltage for diverse electronic systems .
Step Down Chopper
In power electronics, a chopper refers to a type of electronic switch that is used to control the flow of electrical power. It functions as a high-speed ON/OFF semiconductor switch that modulates the voltage or current in a circuit. A chopper is a static device that transforms a fixed DC input voltage into a variable DC output voltage. It acts as the DC counterpart(equivalent) of an AC transformer due to its similar behavior. These are also used in trolley cars, marine hoists, forklift trucks, and mine haulers. Future electric automobiles are likely to use choppers for their speed control and braking. The chopper system offers smooth control, high efficiency, fast response, and regeneration.
Table of Content
- What is Chopper?
- Classification of Chopper
- Construction and Components of Step-Down Chopper
- Step-Down Chopper with Low Pass Filter
- Advantages of Step Down Chopper
- Disadvantages of Step Down Chopper
- Applications of Step Down Chopper