DEPARTMENT OF ELECTRICAL POWER ENGINEERING COLLEGE OF ENGINEERING POWER ELECTRONICS 

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Topics Covered  DC To DC Converters  Boost (Step Up) Converter  Important Parameters 

TOPICS COVERED: DC TO DC CONVERTER Buck (Step Down) Converter • Assumptions Made for Analysis of the Buck Converter • *Circuit Operation Switching Modes • The Load and the Capacitor Current • Continuous Conduction Condition • The Capacitor Voltage Ripple Boost (Step Up) Converter • Assumptions Made for Analysis of the Boost Converter • *Circuit Operation Switching Modes • Continuous Conduction Condition • The Diode and Capacitor Currents • The Capacitor Voltage Ripple Designing DCDC Converters • Converter Design Consideration PULSE WIDTH MODULATED INVERTERS Single Phase Inverter • Single Phase Half Bridge Inverter • Single Phase Full Bridge Inverter • Squarewave Inverter with RL Load • PulseWidth Modulation (PWM) Control Strategy • Amplitude & Harmonics Control • Sinusoidal Pulse Width Modulation (SPWM) • PWM Definitions & Considerations Bipolar Switching (Single Phase) Unipolar Switching (Single Phase) Three Phase Inverter • Switch State for Six Step Inverter • Six Step Inverter (continue)

Boost(Step Up) Converter Output Voltage Average
Continuous Conduction Condition The minimum continuous current is: Note: In practice, L is designed to be 125% greater or 10 times larger than the calculated minimum inductor value. (for allowing continuous current) The Diode and Capacitor Currents
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