Title :
A new microcomputer-based direct torque control system for three-phase induction motor
Author :
Zhong, Hao Yun ; Messinger, H.P. ; Rashid, Muhammad H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA
Abstract :
A microcomputer-based direct primary flux and torque control system for three-phase induction motors is presented, showing that the instantaneous primary flux of the induction motor can be calculated by means of computer software. The control algorithm can be implemented online with only a 1 K ROM memory. The controller, therefore, can be quite compact, and both the hardware and software implementation are easy to achieve. A full digital controller using a 16-bit microcomputer is developed. The experimental results are presented and agree with the theory. It is shown that by selecting a space nonzero voltage vector and its time width the amplitude of the primary flux can be controlled, and by selecting a space zero voltage vector and its time width the amplitude of the electromagnetic torque can be controlled. Therefore, flux and torque control can be achieved independently.<>
Keywords :
computerised control; induction motors; machine control; microcomputer applications; torque control; 3-phase induction motor; microcomputer-based direct torque control system; primary flux control; space nonzero voltage vector; AC motors; Electric variables control; Frequency; Induction motors; Motor drives; Pulse width modulation inverters; Space vector pulse width modulation; Torque control; Velocity control; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96967
