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اطلاعات کتابشناختی
عنوان اصلی: كنترل غيرخطي موتور سنكرون مغناطيس دائم
پدیدآورندگان : سجاد (پديدآور)
نادري لردجاني (پديدآور)
محمدجواد (پديدآور)
يزدان پناه (پديدآور)
رشته مهندسي برق وكامپيوتر-دانشكده مهندسي برق و كامپيوتر (پديدآور)
نوع : متن
جنس : پايان نامه
صاحب محتوا :

کتابخانه دیجیتالی دانشگاه تهران

وضعیت نشر :
خلاصه : Permanent Magnet Synchronous Motor (PMSM) has a nonlinear dynamic and is exposed to systematic, parametric and various kinds of external uncertainties. On the other hand, it is required to keep its desired and nominal performance in different operating conditions. In this way, it can be understood that it is a challenging task to control such a kind of system. In accordance with the main goal of this project, which is keeping the nominal response of the motor in the presence different kinds of uncertainties, two control schemes are investigated for the speed control of the motor.A series controller is designed in the first scheme. A Neural Networks (NN) based Model Reference Adaptive Control method is employed to design the outer loop controller. Since this method is model free, different kind of parametric uncertainties and nonlinear terms can be compensated. The conventional PI controller is usually used to design the inner control loop. While, this controller loses its performance in the presence of parametric variations, plus, the non-ideal effects of the inverter cannot suppressed. Hence, after deriving a suitable model for uncertainties and nonlinear effects of the inverter, they have been compensated in an adaptive manner to increase the performance of this method. In addition to the speed, one of the current components can also be defined as a new controlled output to increase the efficiency and enlarge the operating range of the motor. The reference signal for the new output is usually designed based on parameter dependent equations which are not optimal due to the sever parametric variations. Therefore, two online gradient based method are investigated to estimate the optimal value of the reference signal.The non-series control of the motor, in which the controller is designed by considering all the system dynamics simultaneously, is investigated in the second scheme. The regulation problem is transformed into a stabilization one by designing a suitable feedforward control. Then a sub-optimal controller is designed based on approximate solution of the State Dependent Riccati Equation (SDRE) for the stabilization problem. To increase the degrees of freedom, a new term has been added to the integrand of the conventional quadratic cost function and the optimal control problem has been solved based on this modified cost function. The Integral Sliding Mode Control (ISMC) with boundary layer is used to have a robust controller. But this method is accompanied by tracking error and chattering phenomenon. Based on the ISMC concepts, a new back stepping method based on disturbance observer is designed and added to the nominal controller to solve aforementioned problems and increase the robustness of the control system.One of the main parts of the studied drive system is the modulator. To implement this part the efficient and useful Space Vector Pulse Width Modulation (SVPWM) is usually used. In final section of this study, a new modulation method based on the concepts of SMC is presented to reduce the switching losses compared to the sinusoidal modulation.
یادداشت :
چكيده: به فارسي و انگليسي
كتابنامه: به انگليسي
عنوان به انگليسي :Nonlinear Control of a Permanent MagnetSynchronous Motor
واژه نامه:دارد
گرايش كنترل
كارشناسي ارشد
شناسه : oai:ut.ac.ir:thesis/1-285271
تاریخ ایجاد رکورد : 1394/6/24
تاریخ تغییر رکورد : 1394/7/15
قیمت شيء دیجیتال : فاقد شيء دیجیتالی


* محتوای این صفحه توسط کارشناسان این درگاه ویرایش نشده است. لطفا در صورت مشاهده ایراد در محتوا از این طریق اطلاع رسانی کنید.

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