【摘要】：感應電機的最大轉矩電流比(MTPA)控制算法根據需求轉矩調節(jié)磁鏈幅值,以達到轉矩與定子電流比值的最大化。因磁鏈隨轉矩的變化而變化,不再像傳統(tǒng)控制算法保持磁場幅值恒定,磁場非線性飽和效應會對控制系統(tǒng)產生影響。針對此問題,該文提出考慮磁飽和特性的MTPA轉矩控制系統(tǒng)。根據需求轉矩以及飽和模型,通過線性搜索尋找最優(yōu)磁鏈目標值,并在計算勵磁電流時考慮d軸轉子電流的動態(tài)特性,用降階觀測器觀測轉子磁鏈,并在設計滑模磁鏈控制器以及反步法設計轉矩控制器時考慮觀測誤差,以確保控制器參數的設置能達到全局穩(wěn)定。仿真和實驗結果證明了所設計控制器的有效性。
[Abstract]:The maximum torque / current ratio (MTPA) control algorithm of induction motor adjusts the flux amplitude according to the demand of torque to maximize the ratio of torque to stator current. Because the flux varies with the torque, the magnetic field amplitude is no longer constant as the traditional control algorithm, and the nonlinear saturation effect of the magnetic field will affect the control system. To solve this problem, a MTPA torque control system considering magnetic saturation is proposed. According to the required torque and saturation model, the optimal flux target value is found by linear search, and the dynamic characteristics of d axis rotor current are taken into account in the calculation of excitation current, and the rotor flux is observed with a reduced order observer. The observation error is considered in the design of the sliding mode flux controller and the backstepping torque controller, so as to ensure the global stability of the parameters of the controller. Simulation and experimental results show the effectiveness of the designed controller.
【作者單位】： 同濟大學電子與信息工程學院;
【分類號】：TM346
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本文編號：2251001