Even beyond terminology, it s not obvious what sensorless ac drives can or can t do, and where they fit into the big picture.
Pricing is commensurate with performance delivered.
Rockwell Automation s Force Technology uses a simplified terminal-voltage model for motor reference. The model is based on parameters insensitive to temperature changes during motor operation. Virtually all drive manufacturers offer SV control models. Susan Bowler, Schneider Electric drives marketing manager, lists favorable features as low-speed operation, torque, responsiveness, and positioning capabilities. Schneider Electric s third-generation Altivar SV drives feature autotuning, which eliminates the need for users to enter motor data.