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Dead Time Control

A critical control principle ensuring that switching devices (e.g., high-side and low-side switches) are never simultaneously energized, preventing shoot-through and catastrophic short circuits.
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The statement of the theorem

Let SH,i(t)S_{H,i}(t) and SL,i(t)S_{L,i}(t) be the high-side and low-side switching signals for phase ii, respectively. The dead time constraint mandates that the signals cannot be simultaneously active (high) or simultaneously inactive (low) in a manner that causes a short circuit: SH,i(t)⋅SL,i(t)=0∀t S_{H,i}(t) \cdot S_{L,i}(t) = 0 \quad \forall t Furthermore, the control must ensure a minimum non-zero time interval τd\tau_d where both switches are off (or in a high-impedance state) to prevent shoot-through.