Discussion
Dead time introduces an error in the output voltage that is worst at
Answer: B
Correct answer: low output voltage and low speed
The volt-seconds lost to dead time are the same at every switching, so they are a fixed subtraction from whatever the inverter is trying to produce. At full output that error is a fraction of a per cent; at the low voltages of low-speed operation it becomes a large proportion, distorting the current and causing torque ripple.
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