Heat losses minimization during demagnetization process in vector-controlled induction motor.
Journal Title: Наукові праці Донецького Національного Технічного Університету серія: Електротехніка і Енергетика - Year 2015, Vol 1, Issue 1
Abstract
Analysis of heat losses during demagnetization of motor windings has been done for induction machine in direct field -oriented control system. Euler’s optimization method was used for solving the problem of finding the optimal in energy losses trajectory of rotor magnetic flux change for the process of demagnetization of motor windings. The exponential and step trajectories of rotor magnetic flux change were analysed. Plots of energy losses from the time -constant of exponential transient process show that it is possible to choose time -constant value that allows getting the minimum of energy losses for every certain relation between the rotor and stator resistances. This case can be achieved by choosing the time-constant equals to T0. Theoretical arguments and simulation results proved that exponential trajectory is the optimal in heat losses trajectory of rotor magnetic flux change during demagnetization of the motor, and the step change of rotor magnetic flux from its nominal value to zero is the optimal in processing speed trajectory.
Authors and Affiliations
Olga TOLOCHKO, A. MELNIK
Keywords
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