Single Phase Inverter

1. Switching Source Setup

1. Set two function generators with outputs as square-waves at 10 kHz frequency and 48% duty ratio.
   1. The function generators should be synchronized so that their output signals are 180° out of phase.
   2. The 2% dead time is used as 1% on each side of the square-wave output. Dead time prevents a shoot-through condition where both the upper and lower switches are conducting thus shorting the input DC supply.
2. Test that the function generators' outputs are as expected by observing them on the oscilloscope screen.
   1. Capture the scope screen.
3. Turn the function generator outputs OFF but leave the generators themselves ON.
4. Set the DC power supply to 15 V and leave it disconnected from any circuitry.
   1. Turn it OFF once it is set.

2. Half-Bridge Inverter

1. The half-bridge inverter is tested with the upper and lower MOSFETs switched independently.
2. Build the circuit shown in Fig 1.
   1. Use the 51 Ω resistor as the load.
3. Connect the input V_dc to +15V.
   1. Keep the DC power supply OFF.
4. Connect a regular probe between high-out (HO) and ground.
   1. Connect a differential probe across the load to measure V_out.
      1. Make sure that the scope scaling is at 10X and probe scaling is at 20X.
      2. Do not forget to scale all measurements accordingly.
5. Connect one function generator output to high-in (HIN) which is used to control upper MOSFET switching.
   1. Connect its ground to the common ground of the circuit.
   2. Connect the other function generator output to low-in (LIN) which is used to control lower MOSFET switching.
6. Capture the waveforms and measure the output voltage peak and frequency.
7. Record the input current and voltage readings on the DC power supply.
8. Turn OFF the DC power supply and disconnect the function generator output from the circuit.

Figure 1: Half-Bridge Setup