期刊名称：International Journal of Soft Computing & Engineering
电子版ISSN：2231-2307
出版年度：2012
卷号：2
期号：4
页码：1-10
出版社：International Journal of Soft Computing & Engineering
摘要：The reliability of the drive system is very important in critical systems. The faults in these systems are unwanted and the drive system must be operated under the fault conditions. If fault occurs this may be lead to loss of the human life and capital so the detection of this fault, separation the faulty part and method invention for remedial operation is very important. In this paper the performance of a permanent magnet synchronous motor drive under a stator winding fault is studied and a negative sequence is used to detect the different types of the faults in that winding. This paper is suggested two models for solving these faults. The control in these models depends upon the controlling in each phase separately. The first model doesn’t contain any special tools to improve the torque ripple and THD. The second model contains 2PI current controllers to improvement the performance at fault and remedial operation. One is for the torque and the other is for the flux. The first PI controller is feeding from the torque error between the reference and estimated torques to get new q-axis current component representing modifier current arises from uncertain things inside the machine and drive system. This current will add to reference q-axis current to get robust new q-axis current to satisfy the drive requirement and solve the torque problem (ripple torque). With robust current, the total harmonic distortion is a decrease but doesn’t reach the best value so the other PI controller is used to adjust the THD. In this PI controller, the d-axis flux is compared to rotor permanent magnet flux to solve this problem arises from non-sinusoidal of the magnetic flux. The output of the PI controller is introduced to the reference d-axis current. The new d-axis current will reach the best value of THD. The simulation of the second controller is compared to the simulation of first controller to show if the adding the 2 PI current controllers is profit or not. Here the matlab simulink is used to simulate the drive system.
关键词：fault detection; PI controller; remedial;Operation; stator winding fault; Torque ripple.
