Conference Paper

Robust current control and commutation tuning for an IPMSM drive

Dept. of Electr. Eng., Nat. Tsing Hua Univ., HsinChu, Taiwan
DOI: 10.1109/APEC.2003.1179345 Conference: Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE, Volume: 2
Source: IEEE Xplore

ABSTRACT The operating performance improvement of an interior permanent magnet synchronous motor (IPMSM) drive via robust current control and intelligent commutation tuning is studied in this paper. First, the nominal motor parameters are estimated and a robust current control scheme is designed to possess close and robust winding current tracking performance. It is known that the torque generating capability of an IPMSM is affected by the changes of commutation instant and field excitation. The proof is given to show that the latter can be equivalently achieved by tuning the commutation instant, and the effects of these two variations on the IPMSM drive performances under speed open-loop and closed-loop conditions are observed analytically and experimentally. Then accordingly, an intelligent tuning approach is developed to automatically determine the advance of commutation instant. The minimum current command is achieved to obtain better torque generating capability equivalently. A DSP-based IPMSM drive is established and the effectiveness of the proposed control approaches is demonstrated experimentally.

  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents a robust dynamic control for a DSP-based satellite reaction wheel driven by a surface-mounted permanent-magnet synchronous motor and its friction estimation from the observed disturbance. In the proposed current control scheme, a proportional-plus-integral feedback controller is aug- mented with a resonant-based feedback controller and a robust tracking error cancellation controller to yield an excellent sinu- soidal winding current command tracking control. The controller design considering compromised performances is conducted. As to the outer loop speed control scheme, the equivalent dynamic model parameters at the nominal case are first estimated, and accordingly, a feedback controller is designed to yield the defined reference response. As the changes of the system parameters and operating conditions occur, a simple robust speed error cancel- lation control scheme is developed to preserve the defined re- sponse trajectory. For a larger speed command change, the ramp command with a suited ramping rate is arranged to avoid long- duration control effort saturation. Meanwhile, an observed distur- bance is obtained using a nominal inverse motor drive model, and it is employed to estimate the wheel frictional condition, which can be used in diagnosing the wheel mechanical healthy condition.
    IEEE Transactions on Industrial Electronics 01/2011; 58(10):4693-4707. · 6.50 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper develops robust 2-DOF current and torque control schemes for a permanent magnet synchronous motor (PMSM) drive with satellite reaction wheel load. A DSP-based experimental PMSM-driven reaction wheel system is established, and the key motor parameters are estimated for realizing the proposed control schemes. In the proposed current control schemes, the traditional 2-DOF controller is augmented with an internal model feedback resonant controller or a robust tracking error cancellation controller (RECC). Comparative performance and error analyses of these two proposed control schemes are given. Accordingly, an improved robust 2-DOF current control scheme combining the resonant controller and the RECC is further proposed. The resonant controller enhances the transient and steady-state tracking of the sinusoidal current, simultaneously rejecting the back electromotive force. A similar robust tracking control for the observed torque can be designed, which exhibits quick transient response. Effectiveness of the proposed controls and the driving performance of the whole reaction wheel are evaluated experimentally.
    IEEE Transactions on Power Electronics 06/2009; · 5.73 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A robust uncertainty controller with a system delay compensation for an ironless linear permanent-magnet synchro- nous motor (ILPMSM) system with unknown system parameters has been investigated. The proposed controller consists of an inverse of the first-order reference model with an input deduction and integral term. The system delay compensation adopts an inverse system delay model to compensate the system transport delay effect. The proposed control scheme can reduce modeling uncertainty due to the difference between the reference model and the unknown real system model and disturbance due to d-q-axis coupling effect. The advantages of the proposed control algorithm are as follows: First, the system response which can be achieved is similar to that of the designed nominal reference model. In other words, the dc gain of the controlled system is denoted as one, so the proposed algorithm does not need to be combined with other control algorithms. Second, it does not require the system parameters to be known precisely. Our experimental results con- firm the feasibility of the proposed scheme to compensate for the effects of uncertainty disturbances and system transport delay in the practical application of an ILPMSM system with unknown parameters.
    IEEE Transactions on Industrial Electronics 01/2011; 58(10):4727-4735. · 6.50 Impact Factor