Week 4 Session 5

AC to DC Convertor :

Traction Invertor: Traction invertor is use to convert DC to 3-Phase Ac supply for Traction motor.

DC to DC Convertor :

• Buck Converter:

The buck converter is a step-down converter and produces a lower average output voltage than the dc input voltage.

• Boost converter:

In the boost converter, the output voltage is always greater than the input voltage.

• Buck-Boost converter:

In a buck-boost converter, the output voltage can be either higher or lower than the input voltage.

• Cuk converter:

The output voltage can be either higher or lower than the input voltage providing some advantages over buck-boost (like a continuous current, less current ripple etc.)

• SEPIC converter:

The output voltage can be either higher or lower than the input voltage (with no polarity reversal compared to Buck-boost or Cuk converter).