Model Of Asynchronous Motor Research Articles

Constructing a mathematical model of a synchronous motor with permanent magnets on the rotor

A mathematical model of a synchronous motor is constructed according to the usual assumptions. An analytic description of the stationary modes under constant torque is obtained.

Energy flow in jerk-decoupled translatory feed axes

This paper describes the energy flow in jerk-decoupled translatory feed axes. After an introductory survey on jerk-decoupled feed axes, a system simulation is presented. This system simulation includes a model of the mechanical parts, a model of a synchronous linear motor, and a model of the control circuits. Different energy flows can be simulated using an energy observer. The results are shown in the last section of this paper. With these results, an energy-optimal design of jerk-decoupled linear feed axes can be accomplished.

Magnetically nonlinear and anisotropic iron core model of synchronous reluctance motor

The magnetically nonlinear and anisotropic iron core model of a synchronous reluctance motor (SRM) is presented. The iron core model is given by the current-dependent flux linkages and their partial derivatives. It is included in a dynamic SRM model and confirmed through the comparison of measured and calculated results in the case of current-controlled linear synchronous reluctance servomotor.

Determination of parameters of synchronous motor with permanent magnets from measurement of load conditions

The paper describes the determination of the parameters of the two-axis model of a synchronous motor with permanent magnets using the results of the measurement of load conditions at different sine voltages and constant frequency. For the determination of parameters of the two-axis model the modified conventional method was used. The machine parameters are determined from measurement data by the results of the calculation of the induced voltage E/sub i/ and internal load angle /spl delta//sub i/. Computational difficulties at parameters determination owing to random inaccuracies in the measurements data are overcome with use of orthogonal polinoms approximation. Detailed determination of parameters values reveal an important influence of the interaction of the direct and quadrature axis excitation on the parameters variation.