ABSTRACT:
A robust speed drive system for a switched reluctance
motor (SRM)
using sliding mode control strategy
(SLMC) is presented. After reviewing the operation of an SRM drive, a SLMC based scheme is formulated to
control the drive speed. The scheme is implemented using a micro controller and
a high resolution position sensor. The parameter insensitive characteristics
are demonstrated through computer simulations and experimental verification.
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
EXPECTED SIMULATION RESULTS:
This
paper has described the application of sliding mode control to SRM drive.
Tests were carried out a 5 hp SRM to validate the speed control
responses predicted by simulation and to validate the analytical approach. It
has been shown that sliding mode control is insensitive to plant parameter
variations and that it provides rejection of inherent drive non linearities. The
problem of torque chattering is overcome by adopting a cascaded integral
operation in the torque control path between the sliding mode controller and the
feed forward controller.
REFERENCES:
1. P.J.Lawrenson, J.M. Stephenson, P.T.
Blenkisop, J. Corda and N.N. Fulton, "Variable-speed switched reluctance
motors", IEE Proc., pt. B, vol. 127, no. 4, pp. 253-265, July 1980.
2.
T.J.E. Miller, "Converter volt-ampere requirements of the switched
reluctance motor drive", IEEE IAS Annual Meeting Conf. Record,
Chicago, pp. 813-819, Oct. 1984
3.B.K.
Bose, T.J.E. Miller, P.M. Szczesny and W.H. Bicknell, "Microcomputer
control of switched reluctance motor", IEEE US Annual Meeting Conf.
Record, Toronto, pp. 542-547, Oct. 1985.
4.A.R
Oza, R. Krishnan and S . Adkar, "A microprocessor control
scheme for switched reluctance motor drives", Conf. Record, IEEE
Industrial Electronics Conference, pp.
5.V.I.
Utkin,"Variable structure control systems with sliding mode", IEEE
Trans. on Auto. Control, Vol. AC-22, No. 2, pp. 210-222, April 1977.
