The Research of Direct Torque Control Based on Full-Dimensional State Observer

Abstract:

To overcome integrator initial value, error accumulation and DC offset of pure integration, there proposed a permanent magnet synchronous motor stator flux observation method based on full-dimensional state observer. It uses the stator flux as state vector structural system state equation, the current as the output vector structural system output equation. And it configures the observer poles proportional to the motor model poles and use robust pole assignment algorithm in Matlab for observer gain matrix calculation. Experiments show that the full-dimensional observer on the stator flux observed has higher accuracy. The direct torque control system has better performance.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 1576-1581
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.1576
• Online since: January 2012
• Authors: Shu Ping Xu, Shu Rong Wang, Xiao Hui Su
• Keywords: Direct Torque Control (DTC), Permanent Magnet Motor, Pole Assignment

References

[1] L．Zhong, M．F．Rahman, W．Y．Hu, K．W．Lim, Analysis of Direct Torque Control in Permanent Synchronous Motor Drives, IEEE Trans on Power Electrionics, vol. 12 , pp.528-536, December (1997).

DOI: 10.1109/63.575680

[2] S．COLIN, Adaptive Speed Identification for Vector Control of Induction Motor without Rotational Transducers, IEEE Transactions on Industry Applications, vol. 28, pp.1054-1061, May (1992).

DOI: 10.1109/28.158829

[3] Idris N R N，Yatim A H M, An Improved Stator Flux Estimation in Steady-state Operation for Direct Torque Control of Induction Machine, IEEE Transactions on Industry Applications, vol. 38, pp.110-116 , January (2002).

DOI: 10.1109/28.980364

[4] Hu Jun, Wu Bin, New Integration Algorithms for Estimating Motor Flux Over a Wide Speed Range, IEEE Transactions on Power Electronics, vol. 13, pp.969-977, May (1998).

DOI: 10.1109/63.712323

[5] Xu Junfeng, Xu Yinglei, Xu Jianping, A New Control Method for Permanent Magnet Synchronous Machines with Observer, in　Conf．Aachen Germany：35th IEEE Power Electronics Specialists Conference, 2004, pp.1404-1408.

DOI: 10.1109/pesc.2004.1355628

[6] Hisao Kubota, Kouki Matsuse and Takayoshi Nakano, Dsp-based Speed Adaptive Flux Observer of Induction Motor, IEEE Transactions on Industry Applications, vol. 29, pp.344-348, Feburary (1993).

DOI: 10.1109/28.216542

[7] Lixin Tang, Limin Zhong, Muhammed Fazlur Rahman, A Novel Direct Torque Control for Interior Permanent-Magnet Synchronous Machine Drive With Low Ripple in Torque and Flux –A Speed-Sensorless Approach, IEEE Transactions on Industry Applications, vol. 39, pp.1748-1756, June (2003).

DOI: 10.1109/tia.2003.818981

[8] Jun Zhang, M．F．Rahman, Direct Flux Vector Control Scheme for Induction Machine Drives with Space Vector Modulation, IAS 2005 Conference, pp.1798-1804.

DOI: 10.1109/ias.2005.1518690