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Compare Step Up and Step Down Chopper.
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Sr No. Parameter Step Up Chopper Step Down Chopper
1 Position of chopper switch In parallel with load In series with load
2 Output voltage More than input voltage Less than input voltage
3 Expression of output voltage $\mathrm{V}_{\mathrm{o}}=\mathrm{V}_{\mathrm{dc}} /(1-\alpha) \mathrm{Volts}$ $\mathrm{V}_{\mathrm{o}}=\mathrm{V}_{\mathrm{dc}} \cdot \alpha\mathrm{Volts}$
4 Quadrant of operation Second First
5 Type of Chopper Single quadrant Single quadrant
6 External Inductance Required Not Required
7 Application Battery charging, voltage booster Motor speed control
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