AC vs BLDC Motors: TCO and Engineering Guide for HVAC (2026)

A practical engineering guide to selecting AC induction vs BLDC/PMSM motors for HVAC fans and pumps in the 0.75–2.2 kW range. This article compares drive topology, restart behavior, system BOM, and wiring complexity, and shows how duty cycle (S1 vs S2) and load profile determine real TCO—not just nameplate efficiency.

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