18.1.3 Dead Time and Delay Time

A time delay is introduced between turning off one of the transistors of a leg of an inverter to turning on the other transistor to ensure that a dead short circuit does not occur. This is called dead time.

The following figure shows the dead time insertion.

When multiple PWM blocks are present in a single system, some harmonics can be eliminated by phase shifting the PWM carrier wave. This time delay is referred to as delay time. This time delay is accounted for by the delay in generating carrier waves after reset.

The following figure shows how delay time is introduced.