Analogue simulation of a DC brushless drive

In this paper a technique of analogue simulation is presented and discussed. The proposed technique is applied to a DC brushless drive. For every part of the system under simulation, a proper description is furnished, and the corresponding circuit in the simulator is described. Particular attention is given to simulation of motor variable parameters and disturbances due to switching of drive power semiconductors. An application of the simulator to the study and the realisation of a digital speed control in the DC brushless drive considered is reported. In this application, the effects of the drive disturbances on the digital control system are also studied. Finally, some considerations regarding the advantages pointed out by experimentation with the described technique are reported.

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