Title :
A new dynamic overmodulation strategy for high performance torque control of induction motor
Author :
Chung, Dae-Woong ; Sul, Seung-Ki
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
In this paper, a new dynamic overmodulation strategy is proposed for vector-controlled induction motor drive, and a comparison study with conventional schemes is described in an analytical manner. By considering voltage boundary of inverter and current dynamics of induction motor simultaneously, the proposed overmodulation scheme allocates the output voltage of the inverter so that synchronous d-axis voltage is diminished in proportion as reference voltage exceeds hexagon boundary. As a result, d-axis current of vector-controlled induction motor is decreased in the overmodulation region, which secures the control voltage margin and improves the dynamic performance of torque control. The conspicuous improvement of the proposed scheme over conventional ones is observed in both simulated and experimental results
Keywords :
induction motor drives; invertors; machine vector control; torque control; control voltage margin; current dynamics; d-axis current decrease; dynamic overmodulation strategy; dynamic performance improvement; high performance torque control; induction motor; inverter output voltage allocation; inverter voltage boundary; synchronous d-axis voltage; torque control; vector-controlled induction motor drive; Degradation; Electronic mail; Induction motor drives; Induction motors; Open loop systems; Pulse width modulation; Pulse width modulation inverters; Regulators; Torque control; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.749646
