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Modelling of direct drive motors for performance improvement by design and control

Scholten, Jeroen (2004) Modelling of direct drive motors for performance improvement by design and control.

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Abstract:In this thesis a direct drive permanent magnet motor has been modelled to improve its performance by means of design and control. An electromagnetic motor model has been made which uses construction design parameters to calculate specific properties of a direct drive permanent magnet motor like its steepness, motor constant, reluctance torque, saturation losses, inductance and windings resistance. The model is based on a parametric magnetic equivalent circuit that calculates the flux balance for a three phase motor as a function of the rotor angle. It is generalized for any combination of pole shoes and magnet poles, takes magnetic saturation into account and is validated against three motors. Also a thermal model has been made which uses the same design parameters as input to simulate the thermal behaviour of a motor. By varying the design parameters while calculating the motor performance the electromagnetic model can be used for improving the constructional design of a motor. By using the calculated motor properties like motor constant and reluctance torque in a closed loop model, the performance of a motor design can be improved by means of control. For example the effect of learning control on two motor designs has been simulated.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering MSc (60353)
Link to this item:https://purl.utwente.nl/essays/56909
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