Waveform Representation of Boost Converter
Given below is the output waveform
Waveform representation
In the above output waveforms we have got two time periods Ton and Toff. Ton is the time period at which the transistor is turned ON and Toff is at which the transistor is turned OFF. We can see that during the Ton period the transistor output voltage Vo will be zero IL will start to increase from Imin to Imax and the diode current will be zero.
The equation is given below :
[Tex]VL-Vo + Vin = 0[/Tex]
[Tex]VL = Vo -Vin[/Tex]
Now the energy supplied to the inductor during the start period of transistor is given as
Won = Voltage across inductor × Average current through the inductor × Ton
[Tex]Won = Vin (Imin + Imax/2) Ton[/Tex]
during the OFF period of transistor the energy supplied by the inductor is given as
Woff = Voltage across inductor × Average current through the inductor × Toff
[Tex]Woff = Vo -Vin(imin + imax/2) Toff[/Tex]
therefore Won = Woff
[Tex]Vin(Imin + Imax/2)Ton=Vo-Vin(Imin + Imax/2)Toff[/Tex]
[Tex]VinTo=VoToff – VinToff[/Tex]
[Tex]VoToff = Vin(Ton + Toff)[/Tex]
We know that [Tex]T = TON + TOFF[/Tex],
[Tex]VoToff = VinT[/Tex]
[Tex]Vo = Vin T/Toff[/Tex]
[Tex]Vo = Vin (T/T – Ton)[/Tex]
[Tex]Vo = Vin(T/T – Ton/T)[/Tex]
[Tex]Vo = Vin(1/1 -\alpha)[/Tex]
Boost Converter Operating Principle
In the world of electrical engineering power conversion plays a very important role in efficiently managing energy flow across various electronic systems. Among the types of conversion techniques, the boost converter plays a very important role in voltage regulation. It is one of the simplest types of switch mode converter With its ability to step up DC voltage levels, it finds extensive useful in diverse applications ranging from portable electronics to renewable energy systems.
Table of Content
- Boost Converter
- Working
- Waveform Representation
- Application
- Advantages
- Disadvantages