双能量源纯电动汽车能量控制

Research on Energy Control of Pure Electric Vehicle with Two Energy Sources

发展纯电动汽车已成为解决我国环境污染和能源短缺的主要途径之一,而双能量源是目前纯电动汽车解决电池容量不足的一个较好方式。无刷直流电机根据汽车不同的行驶工况要求在电动和发电两种运行状态之间切换控制,能量利用和回储在大电容和电池之间进行。首先分析无刷直流电机控制系统在硬件不变的情况下实现电动和能量回馈制动的控制原理;然后提出驱动电机在不同工况模式下对蓄电池和超级电容功率需求的分配方案,并根据汽车需求功率和蓄电池、超级电容的SOC等参数,研究相应的模糊控制策略;最后通过在ADVISOR二次开发基础上进行试验。仿真结果表明系统控制效率得到较大提高:与只有单一电源相比,基于无刷直流电机的双能量源纯电动汽车一次充电续驶里程提高了32.80%,50 km/h加速时间降低了42.86%,50 km/h最大爬坡度提升了31.07%,蓄电池电流变化相对平稳,温度大幅降低。

The development of pure electric vehicles has become one of the main ways to solve the environmental pollution and energy shortage in China,and dual energy source is a better way to solve the battery capacity shortage of pure electric vehicle.According to the different driving conditions of the automobile,the BLDCM can switch between the two working states of the motor and the generator,supplying energy by battery and storing energy by large capacitor respectively.Firstly,the control principle of energy supply and energy feedback in the control system of BLDCM is analyzed when the hardware is invariable;secondly,the demand of the drive motor to the power distribution scheme of the battery and the super capacitor under different working modes is put forward,and the corresponding fuzzy control strategy is studied according to the demand power of the pure electric vehicle and the SOC of the battery and the super capacitor;Finally,the test is carried out on the basis of secondary development of ADVISOR.The simulation results show that the control system efficiency of the pure electric vehicle is greatly improved.Compared with the pure electric vehicle of single power supply,the one-charge mileage of the dual-energy source pure electric vehicle based on brushless DC motor is increased by 32.8%,the acceleration time of 50 km/h is decreased by 42.85%,and the maximum climbing inclination is increased by 31.07%under the speed of 50 km/h.The current of the battery changes smoothly,and its temperature is greatly reduced.