【摘要】：開關(guān)磁阻電機作為一種新型調(diào)速電機已經(jīng)在諸如紡織、航空等領(lǐng)域得到了廣泛應(yīng)用,尤其是電動車研發(fā)行業(yè),更在近年成為國家的重點研究項目。但是受結(jié)構(gòu)制約,其嚴重的轉(zhuǎn)矩脈動現(xiàn)象阻礙了其市場應(yīng)用,而傳統(tǒng)的控制策略又不能達到理想的控制效果,因此本文以減小轉(zhuǎn)矩脈動為研究目的,選擇了直接瞬時轉(zhuǎn)矩控制控制策略作為研究方向,從系統(tǒng)設(shè)計的角度闡明了如何實現(xiàn)這一控制理論。本文以一臺7.5kW、三相12/8極開關(guān)磁阻電機為試驗樣機,首先從其雙凸極磁阻結(jié)構(gòu)特點介紹,分析了運作原理。并在理想線性模型下由電流、電感、定轉(zhuǎn)子相對位置角推導(dǎo)出了電磁轉(zhuǎn)矩關(guān)系,引出了由轉(zhuǎn)矩作為直接控制參數(shù)的直接瞬時轉(zhuǎn)矩控制策略。然后展示并說明了直接瞬時轉(zhuǎn)矩控制系統(tǒng)結(jié)構(gòu)和原理,分析了如何有效在電機一個電感周期內(nèi)抑制轉(zhuǎn)矩脈動。由此重點對轉(zhuǎn)矩單元,轉(zhuǎn)矩滯環(huán)器等單元進行了設(shè)計分析,表明利用合理的開通關(guān)斷角即可以滿足恒轉(zhuǎn)矩輸出。接著本文針對該控制策略,硬件上設(shè)計了以TI公司DSP TMS320F28335為主的控制電路,并對相關(guān)位置檢測電路、電流檢測電路、通訊電路、驅(qū)動等主要電路進行細致的工作原理介紹。軟件上根據(jù)直接瞬時轉(zhuǎn)矩控制要求進行C語言編寫,介紹了雙閉環(huán)PI控制和數(shù)字位置識別的編程思想及代碼實現(xiàn),同時對其中的通訊函數(shù),轉(zhuǎn)速計算等內(nèi)容進行算法設(shè)計和流程圖講解。最后本文對直接瞬時轉(zhuǎn)矩控制系統(tǒng)進行測試實驗,得到相關(guān)實驗數(shù)據(jù)和波形,并對實驗結(jié)果進行分析,通過結(jié)果可以看出電機穩(wěn)定運行,證明了該策略的可行性和正確性,并對未來研究方向進行展望。
[Abstract]:As a new type of speed regulating motor, switched reluctance motor (SRM) has been widely used in such fields as textile and aviation, especially in electric vehicle research and development industry, and has become a key research project in our country in recent years. However, restricted by the structure, its serious torque ripple phenomenon hinders its market application, and the traditional control strategy can not achieve the ideal control effect, so the purpose of this paper is to reduce the torque ripple. The direct instantaneous torque control strategy is chosen as the research direction, and how to realize this control theory is expounded from the point of view of system design. In this paper, a 7.5kW three-phase 12 / 8 pole switched reluctance motor is used as the experimental prototype. Firstly, the operating principle is analyzed from the characteristics of its double salient pole reluctance structure. Under the ideal linear model, the electromagnetic torque relation is derived from the current, inductance and relative position angle of stator and rotor, and the direct instantaneous torque control strategy is derived by using torque as the direct control parameter. Then, the structure and principle of direct instantaneous torque control system are demonstrated and explained, and how to restrain torque ripple effectively in a period of inductance of motor is analyzed. The design and analysis of torque unit and torque hysteresis unit are carried out. It is shown that the constant torque output can be satisfied with reasonable turn-off angle. Then, this paper designs the control circuit based on DSP TMS320F28335 of TI Company in hardware, and introduces the main circuits of position detection, current detection, communication, driving and so on. According to the requirement of direct instantaneous torque control, C language is programmed in the software. The programming idea and code realization of double closed loop PI control and digital position recognition are introduced, and the communication function is also discussed. Speed calculation and other contents of the algorithm design and flow chart explanation. Finally, this paper tests the direct instantaneous torque control system, obtains the relevant experimental data and waveform, and analyzes the experimental results. Through the results, we can see that the motor runs stably, and proves the feasibility and correctness of the strategy. The future research direction is prospected.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM352

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本文編號：2362885