Bidirectional Buck or Boost converter

Experiment with the design, modulation and waveforms of the bidirectional Buck or Boost converter. Moreover, choose between classic or synchronous operation (in synchronous mode, the diode is shorted during free-wheeling by the complementary MOSFET). By default, the circuit opens to a classic Buck converter that converts 5W from a 10V input to a 5V resistive load (switching frequency is 20kHz). Here are the steps to experiment with the other conversion modes : 1) Define the voltage levels : the voltage on the left VL should be higher than on the right VR. 2) Set the Width of the pulsed voltage source (Duty ratio) equal to VR/VL). 3) Choose the power direction *Buck mode (Left => Right) Set the Left side switch to the VL source & the Right side switch to the Resistor. *Boost mode (Left <= Right) Set the Left side switch to the Resistor & the Right side switch to the VR source. 4) Set the power level by adjusting the resistor value : R=V^2/P. 5) Select the operation mode Classic Buck : Open the lower MOSFET switch. Classic Boost : Open the upper MOSFET switch Synchronous :Close both MOSFET Switches. 6) Press START and visualize the waveforms during transient and steady-state operation.

published 1 year ago