SENSORLESS CONTROL WITH KALMAN FILTER ON TMS320 FIXED-POINT DSP

The importance of Digital Motor Control (DMC) has grown gradually. As Digital

Signal Processors have become cheaper, and their performance greater, it has

become possible to use them for controlling electrical drives as a cost

effective solution. Some relatively new methods such as speed sensorless field

oriented control utilize this enhanced processing capacity. This document

discusses the implementation of a sensorless field oriented control for

induction motors using the Kalman Filter. First the theory of field oriented

methodology, with and without speed sensor, is described. Then a simulation

approach is given for both cases. Finally the real-time implementation issues of

a sensorless control are discussed. The paper presents an evaluation of the

results. The processing capability of the processor is used to 50% at the

current cycle times, the memory requirement is approximately 6823 Word program,

and 2564 Word data space, of which 1024 Words are C-stack. The appendix contains

full source code of the sensorless control for the TMS320C50 DSP, which is

source compatible to the other members of the Fixed-Point DSP family like 'C1x,

'C2xx.

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