Torque Ripple Minimization And The Design Of Control System For Silicon Transmission Motor

Brushless DC Motor(BLDCM)is extensively applied in the transmission system of silicon wafers.However,the output torque of BLDCM will produce great ripple under the traditional square control method.Therefore,the vector control algorithm is introduced and applied to BLDCM.By controlling the torque current to be constant,the purpose of suppressing torque ripple is achieved.In order to enhance the control performance,a mathematical model of BLDCM is constructed in the d-q coordinate system based on the coordinate transformation theory,and the AC physical quantities are converted into DC physical quantities.In terms of modulation method,this paper proposes to use different sector electric current vector to adjust SVPWM to suppress electromagnetic torque ripple reasonably,so that there is no loss of ratio of torque to current and obtains less torque ripple.Next,the simulation model of coordinate transformation and vector control is established in the Simulink environment.The simulation results show that the torque ripple caused by the vector control algorithm applied in this paper is significantly reduced than that of the square wave control,which also provides the theory instruction for the implementation of the control system.Finally,we used the floating-point processing chip TMS320F28335 DSP as the core processing unit to design hardware system.And the schematic diagram and PCB layout design of each module are completed.Afterward,by means of software programming and design,the vector control strategy based on SVPWM in the article is verified.At the meantime,the experimental research results obtained verify the effectiveness of this measure,which can suppress the torque ripple of BLDCM during operation.