Title :
Applying adjustable frequency controllers to high-starting-torque loads
Author :
Saunders, L.A. ; Crawford, K.S. ; Epperly, R.A. ; Murphy, H.G.
Author_Institution :
Allen-Bradley Co., Metairie, LA
Abstract :
Effectively applying adjustable frequency controllers (AFCs) to high-starting-torque loads, such as positive displacement pumps, extruders, and conveyors, can present unique challenges to the application engineer. A detailed understanding of AFC operation, motor performance, load characteristics, and potential application and installation problems is essential to project success. The authors use recent experience to review the essential system concepts and outline a practical method to minimize potential “pitfalls” and facilitate installation and start-up
Keywords :
PWM invertors; frequency control; installation; load (electric); machine control; motor drives; starting; torque; adjustable frequency controllers; application; conveyors; experience; extruders; high-starting-torque loads; installation; load characteristics; motor performance; pitfalls; positive displacement pumps; recommendations; Automatic frequency control; Chemical industry; Design engineering; Displacement control; Helium; Oil insulation; Petroleum; Pulse width modulation; Temperature; Torque control;
Journal_Title :
Industry Applications, IEEE Transactions on
