Power Electronics, Motors & Drives worked example

Inverter Burn-in Capacity at 65% expected burn-in oven uptime: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop expected burn-in oven uptime to 65%, then walk the calculation through step by step. Estimate good inverter burn-in output from chamber slots, burn-in cycles, uptime, and first-pass yield.

The inputs for this scenario

  • Inverters loaded per burn-in cycle: 4 inverters / cycle (held at the documented default)
  • Planned burn-in cycles in the period: 480 cycles (held at the documented default)
  • Expected burn-in oven uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • Expected burn-in first-pass yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross inverter burn-in capacity = inverters per burn-in cycle × planned burn-in cycles.
  • Good inverter burn-in capacity works out to 1,211 inverters at these inputs, and this is the headline figure for the scenario.
  • Gross inverter burn-in capacity works out to 1,920 inverters at these inputs.
  • Burn-in downtime loss works out to 672 inverters at these inputs.
  • Burn-in yield loss works out to 37.44 inverters at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where expected burn-in oven uptime sits at 90% and the headline result is 1,676 inverters, this scenario comes in 27.78% below the baseline at 1,211 inverters.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to expected burn-in oven uptime, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes every planned cycle loads to its rated inverter count; partial loads, mixed-model soaks, or re-burn of failed units make real output differ from the estimate.

Results at a glance

  • Good inverter burn-in capacity: 1,211 inverters (headline result)
  • Gross inverter burn-in capacity: 1,920 inverters
  • Burn-in downtime loss: 672 inverters
  • Burn-in yield loss: 37.44 inverters

Run it with your numbers

  • To rerun this with your own numbers, open the live Inverter Burn-in Capacity calculator, set expected burn-in oven uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.