Research On Voltage Space-vector Control System Of Synchronous Motor

In oil field, the power factor was reduced and the reactive power consumption was increased because of the usage of the large number of asynchronous motor, and resulting in a huge waste of energy, which reduced the integrated cost-effective of field. The permanent magnet synchronous motor possess all the advantages of asynchronous motor and it has high efficiency and higher power factor. For the advantages of permanent magnet synchronous, it will bring good energy saving results if it is used in pumping unit. As a result, the study on permanent magnet synchronous motor control system is important.In this paper the theory of vector control system on PMSM is first deeply studied, and the idea of coordinate transformation is used to build the mathematical model of PMSM. An in-depth theoretical analysis of voltage space vector control algorithm is done. Secondly, based on the mathematical model of permanent magnet synchronous motor and SVPWM theory, the model of PMSM vector control system is established by of Matlab/Simulink. The simulation result shows the possibility of using the control system.In the paper, the software and hardware of PMSM vector control system is designed core-based TI Company's motor control DSP chip TMS320LF2407A. Hardware includes the main circuit, control circuit and its peripheral circuits; software contains the main program and SVPWM interrupt subroutine, it achieves the implementation of the dual closed-loop current. At last, the motor experiments are carried on under the laboratory, the experimental results verify the correctness of the hardware and control program.