Variable speed, frequency drive controller capable of maintaining control over torque and speed regulation.  
Rated capacity: 15hp - 40hp.  Input 3/60/460v 61amp.  Output 3/60/240v 55amp.  
Has push button controls with LCD display, operates with or without encoder feedback, 
capable of producing 200% torque at speeds as low as 0.4 Hz and torque ripple as low as 2%, 
provides programmable slip compensation, can digitally lock two motor shafts together, 
ability to switch on-the-fly between speed and torque control or position modes, 
110% continuous current overload rating (150% for up to two minutes), 
torque setting +/- 250% of rated torque, and operable in ambient temperatures of 14F to 104F (humidity of 95%, non-condensing).  
Designed for DC drives or AC drives.