Title :
New brushless AC servo drive uses isolated gate bipolar power transistors and a CPU, to obtain high dynamic performance with exceptionally high reliability and efficiency
Author_Institution :
Cleveland Machine Controls Inc., OH, USA
Abstract :
A brushless AC servomotor drive has been developed to take advantage of the higher efficiency of IGBT transistors and a novel method for continuous torque-angle compensation in two directions. The drive employs CPU management to provide an extensive array of protection functions. The authors present the philosophy, theory and principles behind this innovative approach to AC servo-drive design and discuss the current loop, current-sensor closed loop, velocity loop, and the performance and protection functions built into the drive.<>
Keywords :
AC motors; closed loop systems; compensation; digital control; electric current control; electric drives; machine control; machine protection; microcomputer applications; power transistors; reliability; servomotors; velocity control; 2 to 16 kW; 4 to 32 kW; CPU; IGBT; PWM; closed loop; continuous torque-angle compensation; current; design; digital control; efficiency; field weakening; machine control; performance; power transistors; protection; reliability; velocity; Brushless motors; Commutation; Permanent magnet motors; Power amplifiers; Power transistors; Protection; Servomechanisms; Servomotors; Synchronous motors; Torque;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152259
