A comprehensive guide covering VFD fundamentals, principles, selection, harmonic mitigation, installation, and industry applications.
This handbook introduces the basic knowledge and operating principles of variable frequency drives (VFDs), including how to select a VFD and calculate its capacity for different drive systems. It also discusses various VFD operating modes and the impact of high‑order harmonics on power supplies and surrounding equipment.
The book details VFD auxiliary equipment, installation environments, wiring procedures, and presents typical application examples across industries such as fans, pumps, production lines, machine tools, bearing systems, oil fields, and transportation. It serves as a reference for engineers, researchers, and educators involved in VFD design and usage. This manual is written in Chinese.
The handbook lists many VFD operating modes, including forward/reverse operation, remote high‑operation, inching, three‑speed selection, automatic, parallel, proportional, synchronous, same‑speed, brake‑equipped operation, variable‑pole motor operation, and self‑switching to mains power.
It explains the mechanisms that generate high‑order harmonics on the input side, their interference with other equipment, and recommends countermeasures such as filtering, shielding, and proper layout to reduce the impact.