Conference Paper

High performance current regulator for a field-oriented controlled induction motor drive

Dept. of Electr. Eng., Seoul Nat. Univ.
DOI: 10.1109/IAS.1992.244349 In proceeding of: Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE
Source: IEEE Xplore

ABSTRACT A novel strategy of current regulation of a field-oriented
controlled induction motor using a gate turn-off thyristor (GTO)
inverter is proposed which is based on multivariable state feedback
control with an integrator. The controller is designed by the pole
placement technique of multivariable system regulation theory.
Feedforward control is included in the control laws to improve transient
responses. For the full state feedback control, the rotor flux is
estimated with a reduced-order state observer. A good steady-state
performance is obtained by means of an integral compensation, and fast
transient response is also feasible since the required voltage is
directly calculated from the feedforward control. Space voltage vector
pulse width modulation is adopted as a switching strategy. A variable
modulation scheme is presented which is changed from three-phase to
two-phase modulation in the high modulation range, which gives lower
current ripple over the whole operating range

0 Bookmarks
 · 
53 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: The paper discusses the problem of state estimation for the induction motor (IM) drive and presents a Sliding Mode (SM) observer that is developed based on the IM model in the stationary reference frame. The observer is realized using only the measured motor voltages and currents and can be used to provide field orientation in a sensorless IM drive scheme. The observer estimates the stationary reference frame fluxes of the IM and is developed using switching (sliding mode) terms based on the current mismatches. The novelty is that the method uses an arbitrary speed signal to implement the observer rather than the real motor speed. The paper discusses the design of the feedback gains of the observer and shows the flux estimates obtained when the arbitrary speed signal is used. Convergence of the proposed estimator is analyzed using Lyapunov nonlinear stability methods. The theoretical development is supported by simulation results.
    01/2011;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Indirect Field Oriented Control (IFOC) is known to produce high performance in induction Motor (IM) drives by decoupling rotor flux and torque producing current components of stator current. The decoupling control between the rotor flux and the torque is no longer achieved in terms of stator current components this paper introduces a decoupled rotor flux and torque control based on the magnetizing current components by incorporating PI control system and using space vector modulation (SVM) technique. It is able to perform high performance control in IM drives using SVM technique. In order to perform the control strategy, the rotor flux and magnetizing current estimator is proposed. A good performance is obtained By means of PI controller and SVM technique, and the rotor flux and the magnetizing current are obtained properly by the proposed observer.
    Emerging Trends in Engineering and Technology (ICETET), 2011 4th International Conference on; 01/2011
  • [Show abstract] [Hide abstract]
    ABSTRACT: The paper presents a Direct-Flux Vector Control (DFVC) scheme suitable for induction motors employed in light traction applications. In such applications, deep flux weakening is required, and the maximum torque production must be obtained under current and voltage constraints. The mathematical model of the control scheme is discussed and the implementation issues are analysed. Experimental results are presented for a small power induction motor, showing the feasibility of the proposed control, with a particular focus on the robust flux-weakening operation.
    Power Electronics and Motion Control Conference (EPE/PEMC), 2012 15th International; 01/2012