運用磁場導向控制之感應馬達驅動器設計

Abstract

泛用型磁場導向控制器能在任意的參考座標系實現磁場導向控制。因其 具有一般性，所以泛用型磁場導向控制器與任何現有的磁場導向控制相容 ，包括轉子、定子和氣隙磁場導向。論文中比較了這三種磁場導向的轉矩 穩定工作區。然而，準確的馬達參數估測是所有磁場導向控制的先決條件 ，如果估測的參數與實際馬達參數不同時就會發生失解耦的現象並使得驅 動器的性能變差。本論文中分析了在任意參考座標系中，泛用型磁場導向 控器失解耦時磁場和轉矩的情形。同時，提出了感應馬達參數量測和系統 性地設計電流控制器和速度控制器的方法。 經由模擬的結果可以了 解當利用泛用型磁場導向控制器實現轉子、定子和氣隙磁場導向時的響應 。此外，為了分析不同控制變數(電流或電壓)對磁場導向的影響，所以針 對採用不同控制變數的轉子磁場導向響應加以比較。 The principle of the Universal Field Oriented (UFO) control scheme can operate in any arbitrary reference frame. Due to its high degree of generality, the UFO controller is compatible with all the existing field oriented controller: rotor, stator and airgap flux field oriented controller. In this thesis, the stability regions of these three types of controllers are compared. However, correct estimation of the machine parameter is essential for all field oriented control scheme. If the estimated parameters is differ from the machine parameters, the detuning occurs and the drive performance become poor. In this thesis, generalized steady state torque and flux expression are derived analytically for dutuned operation of UFO controller in an arbitrary reference frame. Also, the parameter estimation of induction motor and systematic mathematical formulation is presented for designing motor controller. Simulation results are carried out to show that the performance of the UFO system, i.e., combined rotor, stator and airgap flux orientation. Also, rotor flux orientation with different controlled variable(current or voltage) are simulated and compared.