To select AC drives (frequency inverters), some users may be confused. How to?
Selection Criteria of AC Adjustable-Speed Drives for Users
Types of AC Drive Types Used: Voltz/Hertz (open loop) AC drives, sensorless vector control (also called encoderless control) AC Adjustable-Speed Drives, Field-oriented vector control (closed loop), and other.
When users want to purchase ac drives, generally, selection criteria is: Simple controls / setup, Convenient operator interface, Communication interface choices, Programmable in software, Ability to copy / download parameters, Pricing, Downloadable parameters, EMI / RFI protection, CE Mark / other certification, Enclosure type: NEMA 4, Enclosure type: NEMA 12 and Preset speeds.
Performance selection criteria is presented below if users want to purchase AC Adjustable-Speed Drives.
From one survey, torque control is an influential performance feature. Other criteria is: Tripless operation, Dynamic braking, Sensorless vector control, Distance between motor and drive, Zero speed control, Flux vector control, Multiple motor control from one drive, Line regeneration, Four-quadrant operation, and Medium-voltage operation (2.3 kV and above)
