Sensorless IPMSM Control Based on an Extended Nonlinear Observer with Rotational Inertia Adjustment and Equivalent Flux Error Compensation

Yongle Mao; Jiaqiang Yang; Dejun Yin; Yangsheng Chen

Sensorless IPMSM Control Based on an Extended Nonlinear Observer with Rotational Inertia Adjustment and Equivalent Flux Error Compensation

Vol. 16, No. 6, pp. 2150-2161, Nov. 2016

10.6113/JPE.2016.16.6.2150

Interior permanent magnet synchronous motors

Nonlinear observer

Parameter uncertainty

Sensorless control

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Abstract

Mechanical and electrical parameter uncertainties cause dynamic and static estimation errors of the rotor speed and position, resulting in performance deterioration of sensorless control systems. This paper applies an extended nonlinear observer to interior permanent magnet synchronous motors (IPMSM) for the simultaneous estimation of the rotor speed and position. Two compensation methods are proposed to improve the observer performance against parameter uncertainties: an on-line rotational inertia adjustment approach that employs the gradient descent algorithm to suppress dynamic estimation errors, and an equivalent flux error compensation approach to eliminate static estimation errors caused by inaccurate electrical parameters. The effectiveness of the proposed control strategy is demonstrated by experimental tests.

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Cite this article

[IEEE Style]

Y. Mao, J. Yang, D. Yin, Y. Chen, "Sensorless IPMSM Control Based on an Extended Nonlinear Observer with Rotational Inertia Adjustment and Equivalent Flux Error Compensation," Journal of Power Electronics, vol. 16, no. 6, pp. 2150-2161, 2016. DOI: 10.6113/JPE.2016.16.6.2150.

[ACM Style]

Yongle Mao, Jiaqiang Yang, Dejun Yin, and Yangsheng Chen. 2016. Sensorless IPMSM Control Based on an Extended Nonlinear Observer with Rotational Inertia Adjustment and Equivalent Flux Error Compensation. Journal of Power Electronics, 16, 6, (2016), 2150-2161. DOI: 10.6113/JPE.2016.16.6.2150.