Pump Motors & Drives: Sizing, Efficiency, Variable Speed
A definitive guide to selecting and optimizing pump motors and drives, covering sizing methods, efficiency improvement, and variable speed control for industrial applications.
PumpCalcs reference library
Tag: VFD
4 resources
Methods · worked examples · references
How Variable Frequency Drives Save Energy on Pumps (and How Much)
Variable Frequency Drives (VFDs) exploit pump affinity laws to match motor speed with system demand, cutting electricity use dramatically. This article explains the physics,…
Motor Starting Methods Compared: DOL, Star‑Delta, Soft Start, and VFD
A detailed comparison of Direct‑On‑Line, Star‑Delta, Soft‑Start, and Variable‑Frequency Drive motor starting techniques. Learn the theory, calculations, typical ranges, and practical guidance for selecting…
When a VFD Is the Wrong Choice for a Pump: Risks, Alternatives, and Decision Guidance
Variable‑frequency drives (VFDs) can improve pump efficiency, but they are not universally appropriate. This article explains the technical conditions that make a VFD a…