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PMSM Drive Sliding Mode Control
Koňarik, Roman ; Blaha, Petr (referee) ; Václavek, Pavel (advisor)
The goal of this diploma work is to design a control for permanent magnet synchronous motor in sliding mode. The introduction describes a synchronous motor, sensors which are used in the control process as well as power devices. Further, there is description of mathematical model for the synchronous motor. Another part of the diploma work deals with classic vector control for this kind of motor followed by the sliding mode control for the motor. At the end, there is presented an algorithm which has been implemented in the processor designed for this equipment. All the controllers used in the equipment have been tested on motor simulations. In conclusion, there is a target analysis and facts finding.
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Sensorless Vector Control of Induction Motor
Kokeš, Petr
For sensorless IM control, the problem of simultaneous estimation of inner non-measurable IM state quantities and one or more slowly changing parameters must be solved. For this purpose, the Extended Kalman Filter (EKF) was chosen and an EKF of 7th order was designed to estimate magnetic flux linkage of the stator and rotor and also IM speed and stator and rotor resistances. The IM model was then extended to the 9th order and the corresponding 9th order EKF enabled to estimate further stator parameters. Theoretical solutions were verified by computer simulations and also by practical experiments with a 2,2kW IM fed from 4-level VSI.
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