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

Volume

1

fYear

1999

fDate

14-18 Mar 1999

Firstpage

264

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual

Conference_Location

Dallas, TX

Print_ISBN

0-7803-5160-6

Type

conf

DOI

10.1109/APEC.1999.749646

Filename

749646