Convergence Test of of Model Reference Parameter Adaptive SRM Drives

Számel, László (2005) Convergence Test of of Model Reference Parameter Adaptive SRM Drives. In: EPE 2005, 11th European Conference on POWER ELECTRONICS and Applications, 2005.09.11-2005.09.13, Dresden.

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Abstract

Nowadays switched reluctance motor (SRM) drives have been widel y used in the field of controlled electric motor drives. The paper proposes a model reference par ameter adaptive control method for SRM drives. The main goal of the drive control is to improve dynami cal performance by compensating for the motor nonlinearities. The adaptation practically works only in a relatively narrow speed error track (adaptation range) which is equa l to approximately 20-100 revol ution/min absolute value of speed error. The drawback of this limitation is the relatively short time fo r the algorithm to operate. But the convergence of the algorithm is extremely fast which significan tly reduces the effect of this drawback. Two more important advantages emerge when adaptation works only with small speed errors. First of all the controller at changing drive parameters adapts to parameter s around the value specified by speed reference signal which also assists to speed the adaptation. Th e other significant positive effect is the disappearing of the problem coming from nonlinear systems that the response of the system can even differ in its character when the value, amplitude of the refere nce signal is changed. The convergence test of this control method was performed in an experimental drive s ystem. A SRM of 6/8 pole and 4 kW rated power was used. Simulation and e xperimental results are present ed.

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