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Microprocessor-controlled brushless DC linear stepping motor

Ismael, Adel 2018. Microprocessor-controlled brushless DC linear stepping motor. PhD Thesis, Cardiff University.
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Presently, there is a rapidly growing research interest for an efficient, high thrust density and high thrust to input power electrical linear machine. However, only limited work has been carried out in terms of the development of brushless DC linear motors (BDCLM). Focusing on this research gap which presently exist in this field, this thesis makes the development of the BDCLM the research objective, in order to produce a large thrust to input power, compared to the already existing designs. The motor is designed in such way that the motor core accommodates twenty-four independent multi-layer coil sections wound with enamelled copper wire and each layer section has 470 turns without compromising the effective air-gap. Also, a design commutation algorithm to provide a smooth movement and a high thrust for the BDCLM is implemented. The design, analysis and optimization of the BDCLM in applications that requires a high thrust to input current ratio is described in this project. The investigation includes; the analysis, design, and control of the BDCLM through appropriate modelling, construction and experimental validation of the modelled results, employing both the static and dynamic approaches. The BDCLM design was analysed from electrical, mechanical and magnetic perspectives. A Finite Element Method (FEM) was used to predict the performance of the BDCLM and to optimise the motor parameters. Additional challenges such as force ripple and normal force are investigated and analysed. A Proportional Integral Derivative (PID) control system, based on an Arduino Mega board is used to control the motor speed and position. A graphical user interface (GUI) is built in LabVIEW environment to control the Arduino board. V The experimental results were within 8.9 %, 2 % and 3 % of the modelled results with respect to the motor thrust, speed and position. These results demonstrate a good agreement between the two approaches. This research work can be considered as an initial step to developing the BDCLM for commercial applications.

Item Type: Thesis (PhD)
Date Type: Submission
Status: Unpublished
Schools: Engineering
Uncontrolled Keywords: Brushless DC linear motor design; Modelling linear motor using finite element method; PID controller; Thermal Analysis of Brushless DC Linear motor design; MATLAB/SIMULINK modelling of Brushless DC linear motor.
Date of First Compliant Deposit: 1 February 2019
Last Modified: 11 Dec 2020 02:47

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