Publication: Design of three-phase permanent magnet brushless direct current motor
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Date
2023-07
Authors
Allen, Bradley Lazurus
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Abstract
Permanent magnet brushless DC (PM BLDC) motor has gained its fame for having broad dynamic applications in different industries such as automotive industries and pumping industries. Due to its high performance, many researches have been done to improve and innovate the motor such that it can be used in various applications. Therefore, this project is conducted to design a three-phase permanent magnet brushless DC (PM BLDC) motor that is suitable for electric bicycles application. The dimensions of motor such as stator slot and rotor pole are proposed and calculated. The simulation will be done using Ansys Software specifically using Maxwell-2D tool. The construction process of motor in Ansys Software is explained. The materials used for the motor in the simulation and completion of stator slot and rotor pole are displayed. The configuration of coil winding arrangement in the Ansys Software will also be shown to indicate each of the phases of Phase A, Phase B and Phase C. Theoretical values of parameter such as rms voltage, current, power output, torque, losses and power input are
calculated. The magnetostatic analysis will be discussed which showing the motor is performing appropriately. There are three operating conditions in which are no-load operating condition, full-load operating condition and half-load operating condition. The motor will be simulated in these three conditions. The simulation results will be displayed and explained. During no-load operating condition, the simulation results for current, torque, power output and power input will be zero instead the cogging torque and induced voltage are the only values that are produced which are 0.0381Nm and 27.25V respectively. During full-load operating condition, simulation results for torque and output power produced are 6.18Nm and 191.77W respectively. During half-load operating condition, simulation results for torque and output power produced are 3.6Nm and 111.19W respectively. The theoretical values and simulation results will be analytically analysed by comparing the values of theoretical values and simulation results.