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Thursday Colloquium

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November 8, 2018, 12:30 PM, dr. Tomasz Tarczewski (NCU Torun) will deliver a talk entitled ''State feedback control – with prediction of constraints and with autotuning – for PMSM drives and DC-DC power converters''As usually the Thursday Colloquium will be held in auditorium COK. 




 

Abstract:

„Over the past years, electrical drives with permanent magnet synchronous motors (PMSMs) and modern DC-DC power electronics converters have been widely used in automotive applications (e.g. in hybrid and electrical vehicles, in DC-bus charging stations), and in renewable energy sources (as interfaces and in high-voltage direct current electric power transmission systems). Most of these applications require precise control of selected state-space variables to achieve good dynamical behaviour and disturbance compensation. Aforementioned tasks may be accomplished by using Cascade Control Structure (CCS) or State Feedback Control (SFC) structure, respectively. The main advantages of the first approach are related to simple and intuitive tuning rules as well as to the possibility of keeping selected state-space variables in desired ranges. On the other hand, the main disadvantage of the CCS is related to the negative impact of the inner control loop on the dynamics of the outer control loop, what results in a worse compensation of non-measurable disturbances. Since SFC approach operates in a cascade-free manner, it gives a possibility to obtain superior disturbance compensation. On the other hand, the well-known disadvantages of SFC (i.e. limitation of state-space variables and non-intuitive tuning rules) significantly reduce the possibilities of application considered control structure on a large scale.

I will present original solutions that overcome aforementioned drawbacks of SFC approach. Firstly, on the basis of differential equations describing model of the plant, discrete predictive formulas will be introduced for “a posteriori” limitation of selected state-space and control variables. Secondly, an application of non-gradient nature-inspired optimization algorithm to automatic selection of SFC coefficients will be shown.

Experimental verification of developed solutions concerns modern electrical drives and power electronics converters will be depicted.

dr. Tomasz Tarczewski

 

 

The Thursday Colloquium is organized by the Institute of Physics at NCU Torun.

Full list of speakers.

 

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