EXPERIMENT SCHEDULING FOR THE CHOICE OF OPTIMAL VALUES OF PARAMETERS FOR AN ASYNCHRONOUS ENGINES

Abstract

Start dynamic of an asynchronous engine depends on parameters series of the engine (factors). Realization of experiments by the way of looking over all possible values of factors is an insurmountable task. Therefore scheduling of an experiment for reduction of the carried-out number of experiments is used. Electromechanical transients can be lengthy. This requires significant computer time for simulation. Therefore, an improved method for the numerical solution of the equations of state of an induction motor was chosen for simulation, which leads to a reduction in simulation time and an increase in the accuracy of calculations. In this article scheduling of an experiment is considered to find factors values at which the maximum of target function (rotation frequency Ω) for the given time t_end is reached.

Object of a research is the two-phase condenser engine with a phase rotor. Factors are the active resistance of a phase rotor circuit and also capacity of the phase-shifting condenser. Scheduling of an experiment assumes realization of physical or computer experiment, using adequate mathematical model. Application of a computer experiment using of the subprogram for modeling stage of start an asynchronous engine at the preset values of factors is considered in this article. As there is a little number of factors k, the complete factorial experiment is used. Scheduling of an experiment is carried out in two steps. First of all the linear programming is applied to approach area of an optimum. Coefficients of the linear polynomial which setup the direction of abrupt ascent to an optimum point are defined.

The developed universal computer’s programs can be applied to definition of an optimum of target function location for any device.