Title :
Control of a combined GTO/IGBT drive system for low torque ripple in a large permanent magnet synchronous motor
Author_Institution :
Electr. & Comput. Eng. Dept., Northeastern Univ., Boston, MA, USA
Abstract :
A control method is developed for a drive system, built of a parallel interconnection of a high-power GTO and a low-power fast-switching IGBT, feeding a large permanent magnet synchronous motor (PMSM) where torque ripple attenuation is a primary concern. The GTO is the main power supply and the IGBT is used for attenuating the current ripple due to the GTOs low switching frequency. The proposed controller combines a hierarchical, passivity-based dynamic feedback compensator, guaranteeing global exponential stability, as a well as a space vector PWM (SVM) strategy, that prevents stray, zero-sequence currents. The prevention of substantial stray currents between inverters is essential for the successful implementation of the proposed topology and is addressed by the combination of the master-slave compensator structure with the matching SVM strategy.
Keywords :
insulated gate bipolar transistors; machine control; permanent magnet motors; pulse width modulation; stability; synchronous motors; thyristor motor drives; thyristors; torque; PMSM; current ripple attenuation; drive system; fast-switching IGBT; high-power GTO; large permanent magnet synchronous motor; low switching frequency; master-slave compensator; parallel connection; passivity-based dynamic feedback compensator; space vector PWM strategy; space vector modulation; stability; torque ripple attenuation; zero-sequence currents; Attenuation; Control systems; Feedback; Insulated gate bipolar transistors; Permanent magnet motors; Power supplies; Power system interconnection; Support vector machines; Switching frequency; Torque control;
Journal_Title :
Control Systems Technology, IEEE Transactions on
DOI :
10.1109/TCST.2003.821949
