Field Oriented Control of Permanent Magnet Synchronous Motor Using DSPIC30F4011/6010A

Abstract

Owing to requirement of modem society, high frequency, eciency and comfort ofwork and living, modem elevators require more and more sophisticated drive require-ment, such as permissible load, travel velocity, landing precision, passenger comfort,low energy consumption and linear toque control etc. All traditional control systems,such as DC motor drive, variable-poles AC motor drive, variable-voltage AC motordrive and VVVF AC motor drive cannot satisfy the requirement of modem elevator.The low-speed gearless permanent magnet synchronous motor (PMSM) is a hot topicin techniques for modem elevator drive in recent years in the world. Variable-polestwo-speed AC motor, VVVF controlled DC motor and PMSM drive system has pre-sented tradition-breaking improvement compare with hydraulic system. Nonetheless,in electric drive system, the perfect performance of lower-speed gearless PMSM isincomparable.The thesis is based on the FOC (Field Oriented Control) of PMSM motor usingdsPIC30F4011/6010A. A ux-weakening technique can be applied when extensionof motor speed beyond the base speed is desired. The FOC with its ux/torquedecoupling feature is realized with the digital PWM controller in rotating d-q coor-dinate system. This kind of control requires relative powerful controller along withthe DSP features and relative peripherals to make the vector control practical propo-sition.The DSC board used, dsPIC30f4011/6010A programmed using MPLAB IDEand C-compiler software for this type of drive applications. This report gives the briefidea about eld oriented control technique of PMSM, application of PMSM, spacevector PWM, software implementation of FOC and design and fabrication of prototype motor control board.Comparision of simulated and actual hardware results areshown which is as per requirement. Relation between speed-torque characteristic ofresult is described. In this report 5.5 KW Permanent Magnet Synchronous Motor isconsidered for the elevator and FOC is successfully implemented on 2hp Inductionmotor with necessary changes in the program.