Enter the DC bus voltage (volts) and the difference in modulation indices into the calculator to determine the Inverter Voltage. 

Inverter Voltage Formula

The following formula is used to calculate the Inverter Voltage. 

VI = Vdc * dm


  • Where VI  is the Inverter Voltage (volts)
  • Vdc is the DC bus voltage (volts) 
  • dm is the difference in modulation indices 

How to Calculate Inverter Voltage?

The following two example problems outline how to calculate the Inverter Voltage.

Example Problem #1:

  1. First, determine the DC bus voltage (volts). In this example, the DC bus voltage (volts) is measured to be 95.
  2. Next, determine the difference in modulation indices. For this problem, the difference in modulation indices is calculated to be .45.
  3. Finally, calculate the Inverter Voltage using the formula above: 

VI = Vdc * dm

Inserting the values from above and solving the equation with the imputed values gives: 

VI = 95 * .45 = 42.75 (volts)

Example Problem #2: 

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

DC bus voltage (volts) = 42

difference in modulation indices = .75

Entering these values into the formula or calculator above gives us:: 

VI = 42 * .75 = 31.5 (volts)