| Abstract |
This paper presents new procedures for electrical parameters estimation of induction motors based on
its continuous-time model and by application of the recursive least-squares algorithm. The use of the
continuous time model requires the calculation of the derivatives of current and voltage measured
signals, which are determined using polynomial interpolation (spline-type) techniques. Three different
linear regression forms are presented. The first one enables the simultaneous estimation of all the
parameters of the model. The others consider some a priori knowledge. For each procedure, all the
electrical parameters are obtained considering the equivalent machine concept that will be defined.
The estimation procedures are applied in the self-comissioning phase, prior to the machine start-up. In
order to avoid any machine intervention, only no-torque signals are used in the standstill tests. The
conditions to produce these no-torque voltages with the PWM inverter, avoiding ripple torque
generation, are analyzed. The paper includes experimental results, which confirm the good
performance of the proposed procedures. |
