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Implementation and evaluation of a multi-axis brushless DC motor control using a planar finite element approach

Eijking, Bram (2021) Implementation and evaluation of a multi-axis brushless DC motor control using a planar finite element approach.

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Abstract:In certain applications it is desirable to have compact solutions that are able to drive multiple degrees of freedom. This could be realized with a multi-motor design that features concentric axes that can be independently driven. This report shows a first step towards testing and validation of a BLDC multi-motor and two control methods will be tested using a planar finite element method. This finite element method was first validated using simplified models that can also be approximated analytically such that the results can be compared and the accuracy can be determined. A prototype was built with two output shafts on which measurements were conducted which were compared to the results of the FEMM model. Based on the obtained results it was shown that it is possible to achieve the required output torque on both output shafts such that the outputs can be decoupled using a controller. Besides this analysis a comparison was made between two different control techniques being sinusoidal and trapezoidal control. From the results it was shown that sinusoidal control has a benefit in the fact that the torque ripple is reduced significantly as well as reducing the cross link torque for one of the outputs significantly.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:54 computer science
Programme:Systems and Control MSc (60359)
Link to this item:http://purl.utwente.nl/essays/85989
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