【摘要】：隨著能源短缺和環(huán)境污染問題日益凸顯,新能源汽車成為了未來汽車的發(fā)展方向,其中,插電式混合動力汽車既能夠大幅度降低燃油消耗和排放,同時(shí)還有較長的續(xù)航里程,在當(dāng)前階段具有獨(dú)特的優(yōu)勢。無級變速器是混聯(lián)式混合動力系統(tǒng)的關(guān)鍵單元,本文所研究的電磁變速器是一種無刷化的無級變速器,由于其特殊的結(jié)構(gòu)和工作原理,以及混合動力系統(tǒng)的特殊應(yīng)用背景,對其控制有了更高的要求,另外燃油經(jīng)濟(jì)性和低排放對混合動力系統(tǒng)能量管理有新的要求。本文首先分析了基于電磁變速器的混合動力系統(tǒng)的工作原理。采用圖解的方法對電磁變速器的特性進(jìn)行了分析,得出了不同速比下電磁變速器的工作狀態(tài)和能量流動情況;對混合動力系統(tǒng)的工作原理進(jìn)行了分析,確定了混合動力系統(tǒng)各端口功率關(guān)系;分析了混合動力系統(tǒng)的工作模式,為系統(tǒng)的控制和能量管理策略的制定提供依據(jù)。其次,研究了基于電磁變速器的混動力系統(tǒng)的控制策略。建立了電磁變速器系統(tǒng)的數(shù)學(xué)模型;為避免動力系統(tǒng)輸出端轉(zhuǎn)速和內(nèi)燃機(jī)轉(zhuǎn)速差較大時(shí),電磁變速器失去轉(zhuǎn)矩傳遞能力,提出了電磁變速器的弱磁控制方法,仿真結(jié)果表明,所提出的弱磁控制方法對電磁變速器有良好的控制效果;提出了電磁變速器系統(tǒng)的協(xié)調(diào)控制策略,并在多種運(yùn)行模式下進(jìn)行了仿真,仿真結(jié)果表明,所提出的控制策略對系統(tǒng)有良好的控制效果。再次,為了在滿足汽車動力性能的同時(shí),提高車輛的經(jīng)濟(jì)性,研究了能量管理策略。先介紹了模糊控制的基本理論,然后分析了能量管理的原理,接著設(shè)計(jì)了驅(qū)動模糊控制器和制動模糊控制器。最后,采用Cruise軟件建立了混合動力汽車仿真模型,來驗(yàn)證能量管理策略,并分別在NEDC工況和UDDS工況下進(jìn)行了仿真,仿真結(jié)果表明發(fā)動機(jī)運(yùn)行于最佳效率曲線上,電池得到了優(yōu)化控制;為了評估所提出的能量管理策略對汽車燃油經(jīng)濟(jì)性的作用,與Prius2012的測試結(jié)果進(jìn)行了對比,對比表明與Prius2012的能耗非常接近,說明本文提出的能量管理策略性能良好。
[Abstract]:With the increasingly prominent problems of energy shortage and environmental pollution, new energy vehicles have become the development direction of future vehicles, in which plug-in hybrid vehicles can not only greatly reduce fuel consumption and emissions, but also have a long life mileage. It has a unique advantage at the current stage. The CVT is the key unit of the hybrid power system. The electromagnetic transmission studied in this paper is a kind of brushless CVT. Because of its special structure and working principle, and the special application background of the hybrid power system, the electromagnetic transmission studied in this paper is a kind of brushless CVT. There are higher requirements for its control and new requirements for energy management of hybrid power system with fuel economy and low emission. In this paper, the principle of hybrid power system based on electromagnetic transmission is analyzed. The characteristic of electromagnetic transmission is analyzed by graphic method, and the working state and energy flow of electromagnetic transmission with different speed ratio are obtained. The working principle of the hybrid power system is analyzed, and the power relationship between the ports of the hybrid power system is determined, and the working mode of the hybrid power system is analyzed, which provides the basis for the control of the system and the formulation of the energy management strategy. Secondly, the control strategy of hybrid power system based on electromagnetic transmission is studied. The mathematical model of electromagnetic transmission system is established. In order to avoid the loss of torque transfer ability of electromagnetic transmission when the power system output speed and internal combustion engine speed difference is large, the magnetic weakening control method of electromagnetic transmission is proposed. The simulation results show that: The proposed weak magnetic control method has a good control effect on electromagnetic transmission. The coordinated control strategy of electromagnetic transmission system is proposed and simulated under various operation modes. The simulation results show that the proposed control strategy has a good control effect on the system. Thirdly, the energy management strategy is studied in order to improve the vehicle economy while satisfying the vehicle dynamic performance. Firstly, the basic theory of fuzzy control is introduced, then the principle of energy management is analyzed, and then the driving fuzzy controller and braking fuzzy controller are designed. Finally, the hybrid electric vehicle simulation model is established with Cruise software to verify the energy management strategy. The simulation results show that the engine is running on the optimal efficiency curve under the NEDC and UDDS operating conditions, and the simulation results show that the engine is running on the optimal efficiency curve. The battery is optimized. In order to evaluate the effect of the proposed energy management strategy on automobile fuel economy, the comparison with the test results of Prius2012 shows that the energy consumption of the proposed energy management strategy is very close to the energy consumption of Prius2012, indicating that the performance of the energy management strategy proposed in this paper is good.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U469.7
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本文編號：2468826