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首页> 外文会议>18th international electric vehicle symposium(EVS-18) >Tests Results with Regenerative Braking based on Ultracapacitors and a Buck-Boost Converter
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Tests Results with Regenerative Braking based on Ultracapacitors and a Buck-Boost Converter

机译：基于超级电容器和降压-升压转换器的再生制动测试结果

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An ultracapacitor bank control system for an Electric Vehicle has been implemented. The purpose of thisrndevice is to allow higher accelerations and decelerations of the vehicle with minimal loss of energy, andrnminimal degradation of the main battery pack. The system uses an IGBT Buck-Boost converter, which isrnconnected to the ultracapacitor bank at the Boost side, and to the main battery at the Buck side. The designrnhas been optimized in weight and size, by using a water-cooled system for the power converter, and anrnaluminum inductor with air core. The ratings of the ultracapacitor are: nominal voltage: 300 Vdc; nominalrncurrent: 200 Adc; capacitance: 20 Farads. The amount of energy stored allows to have 40 kW of powerrnduring 20 seconds, which is enough to accelerate the vehicle without the help of the traction batteries. Thernvehicle uses a brushless dc motor with a nominal power of 32 kW, and a peak power of 53 kW. Therncontrol of the system measures the battery voltage, the battery state-of-charge, the car speed, therninstantaneous currents in both the terminals (battery and ultracapacitor), and the actual voltage of thernultracapacitor. A microcomputer control based on a DSP manipulates all the variables and controls thernPWM switching pattern of the IGBTs. When the car runs at high speeds, the control keeps the capacitorrndischarged. If the car is not running, the capacitor bank remains charged at full voltage. Medium speedsrnkeep the ultracapacitors at medium voltages, to allow future accelerations or decelerations. The batteryrnvoltage is an indication of the car instantaneous situation. When the vehicle is accelerating, the batteryrnvoltage goes down, which is an indication for the control to take energy from the ultracapacitor. In thernopposite situation (regenerative braking), the battery voltage goes up, and then the control needs tornactivate the Buck converter to store the kinetic energy of the vehicle inside the ultracapacitor. Thernmeasurement of the currents in both sides allows to keep the current levels inside maximum ratings. Thernbattery state-of-charge is used to change the voltage level of the ultracapacitor at particular speeds. Therncar used for this experiment is a Chevrolet LUV truck, similar in shape and size to a Chevrolet S-10,rnwhich was converted to an electric vehicle at the Catholic University of Chile.
机译：已经实施了用于电动车辆的超级电容器组控制系统。该装置的目的是允许车辆进行更高的加速和减速，而能量损失最小，主电池组的降解最小。该系统使用IGBT降压-升压转换器，该转换器在Boost侧连接到超级电容器组，在Buck侧连接到主电池。通过使用电源转换器的水冷系统和带空心磁芯的铝电感器，对设计和重量进行了优化。超级电容器的额定值为：标称电压：300 Vdc；标称电流：200 Adc;电容：20法拉。存储的能量允许在20秒内具有40 kW的功率，这足以在没有牵引电池帮助的情况下使车辆加速。车辆使用额定功率为32 kW，峰值功率为53 kW的无刷直流电动机。系统的温度控制可测量电池电压，电池充电状态，汽车速度，两个端子（电池和超级电容器）中的瞬时电流以及超级电容器的实际电压。基于DSP的微机控制可操纵所有变量并控制IGBT的PWM开关模式。当汽车高速行驶时，控制装置使电容器保持放电状态。如果汽车不运行，则电容器组将保持充满电。中速-将超级电容器保持在中压，以允许将来加速或减速。电池电压是汽车瞬时状况的指示。当车辆加速时，电池电压下降，这表明控制系统从超级电容器中获取能量。在正负极情况下（再生制动），电池电压升高，然后控制需要将Buck转换器激活以将车辆的动能存储在超级电容器内部。双方电流的测量允许将电流水平保持在最大额定值以内。电池的充电状态用于以特定速度改变超级电容器的电压电平。用于该实验的Thencar是雪佛兰LUV卡车，其形状和大小与Chevrolet S-10相似，在智利天主教大学被转换为电动汽车。

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