![](https://www.electriquel.com/wp-content/uploads/2021/08/chopp.png)
Application of Chopper
- Speed control of DC Motor.
- Positional control in robotics.
- Regulated power supply (SMPS).
- Input to Inverter.
- Solar Power Converter.
Step Down Chopper
![](https://www.electriquel.com/wp-content/uploads/2021/08/chopp_1.png)
![](https://www.electriquel.com/wp-content/uploads/2021/08/chopp_2.png)
- CH: – fully controlled switch
- Operation: – Periodic
- Time period: – T
- Duty cycle: – Ton/T
- Ton = DT
- CH: – ON Vo=Vs
- CH: – OFF Io=0/Vo=0
Buck Converter
![](https://www.electriquel.com/wp-content/uploads/2021/08/chopp_3.png)
S1 :- Fully Controlled Switch -MOSFET(high frequency)/IGBT/SCR + Commutation Circuit
S2:- Uncontrolled Switch – provides free wheeling action (due to L)
DC Motor load – Step down chopper with a freewheeling diode.
![](https://www.electriquel.com/wp-content/uploads/2021/08/converter1-1.png)
- SW:-ON (0<t<DT)
- Vo = Vs
- Vs =
- L :- charging
![](https://www.electriquel.com/wp-content/uploads/2021/08/converter2.png)
- SW :- OFF (DT<t<T)
- 0=
- L:- discharging
![](https://www.electriquel.com/wp-content/uploads/2021/08/converter3_1-1024x536.png)
Discontinuous Conduction
![](https://www.electriquel.com/wp-content/uploads/2021/08/Discontinue1.png)
- Current can become 0 for finite duration of time.
- Boundary :- When current
only for an instant of time.
![](https://www.electriquel.com/wp-content/uploads/2021/08/Discontinue2_1.png)
Good read
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