外文翻译----电动自行车锂电池管理系统设计.doc
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外文翻译----电动自行车锂电池管理系统设计,battery electric vehicle1 technical overview of electric vehiclethe advantage of the evs is the mechanical simplicity of the drivetrain. for example, an ev driv...
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Battery Electric Vehicle
1 Technical Overview of Electric Vehicle
The advantage of the EVs is the mechanical simplicity of the drivetrain. For example, an EV drive train can convert energy stores into vehicle motion, just like a conventional vehicle, and it can also reverse direction and convert vehicle motion back into energy stores through regeneration barking, which means that theirs energy/work loop is inherent bi-directional. Besides, moving parts of the electric motor in the EVs consist primarily of the armature (DC motors) or rotor (AC motors) and bearings, a relatively simple and far more efficient machine. other advantages include electric motor torque much more suited to the torque demand curve of a vehicle. EV drive train often needs only one gear ratio other than two or more. More-over, a reverse gear is unnecessary because the rotational direction of the motor itself can be reversed simply by reversing the electrical in-put polarity.
However, the function capabilities and the cost/benefits profile of electronic system are rather complicated. Electrical power is delivered to the wall outlet in the form of alternating current, and must be converted into direct current in order to charge EV batteries. In the case of EVs powered by DC motor, electricity from the battery must then be “chopped” into small bursts of variable duty cycle in order to control the speed and torque of the motor. With EVs using AC motors, the direct current from the battery must undergo complex power condition
电动自行车锂电池管理系统设计
1 电动汽车技术概述
电动汽车的优点是具有简单的机械传动机构。电动汽车能够像传统的汽车一样将本身的能量转变成汽车的动能，但它却还可以沿相反方向进行转换，利用能量再生制动系统将动能转换成汽车的电能储备，这说明它的能源和工作回路是双向的。此外，电动汽车的运动部件电动马达主要由电枢（直流电机）或转子（交流电机）和轴承组成，电机不仅仅具有结构简单效率高的优点，而且它的输出扭矩适合车辆的扭矩曲线。电动汽车的动力传动系统往往只需要一个传动比，不需要倒档，因为旋转运动方向的变换可以通过改变电力输入的极性来实现。
电池系统的充电是相当复杂的。通过电源插座传送的是交流电，必须转换成直流电，才能被用来为电动汽车电池充电。如果电动汽车采用了直流电动机，来自电池的能源必须被“切”成具有一定周期的可变占空比，才能用以控制发动机的速度和扭矩。随着电动汽车越来越多的采用交流电机，为了提供交流电和控制汽车动力输出的能量，从电池来的直流电必须进行复杂的能源转换。纯电动汽车的主要缺点是电池能源有限，而混合电动汽车的复杂的动力系统是困扰其质量提高和成本的居高不下的原因。
1 Technical Overview of Electric Vehicle
The advantage of the EVs is the mechanical simplicity of the drivetrain. For example, an EV drive train can convert energy stores into vehicle motion, just like a conventional vehicle, and it can also reverse direction and convert vehicle motion back into energy stores through regeneration barking, which means that theirs energy/work loop is inherent bi-directional. Besides, moving parts of the electric motor in the EVs consist primarily of the armature (DC motors) or rotor (AC motors) and bearings, a relatively simple and far more efficient machine. other advantages include electric motor torque much more suited to the torque demand curve of a vehicle. EV drive train often needs only one gear ratio other than two or more. More-over, a reverse gear is unnecessary because the rotational direction of the motor itself can be reversed simply by reversing the electrical in-put polarity.
However, the function capabilities and the cost/benefits profile of electronic system are rather complicated. Electrical power is delivered to the wall outlet in the form of alternating current, and must be converted into direct current in order to charge EV batteries. In the case of EVs powered by DC motor, electricity from the battery must then be “chopped” into small bursts of variable duty cycle in order to control the speed and torque of the motor. With EVs using AC motors, the direct current from the battery must undergo complex power condition
电动自行车锂电池管理系统设计
1 电动汽车技术概述
电动汽车的优点是具有简单的机械传动机构。电动汽车能够像传统的汽车一样将本身的能量转变成汽车的动能，但它却还可以沿相反方向进行转换，利用能量再生制动系统将动能转换成汽车的电能储备，这说明它的能源和工作回路是双向的。此外，电动汽车的运动部件电动马达主要由电枢（直流电机）或转子（交流电机）和轴承组成，电机不仅仅具有结构简单效率高的优点，而且它的输出扭矩适合车辆的扭矩曲线。电动汽车的动力传动系统往往只需要一个传动比，不需要倒档，因为旋转运动方向的变换可以通过改变电力输入的极性来实现。
电池系统的充电是相当复杂的。通过电源插座传送的是交流电，必须转换成直流电，才能被用来为电动汽车电池充电。如果电动汽车采用了直流电动机，来自电池的能源必须被“切”成具有一定周期的可变占空比，才能用以控制发动机的速度和扭矩。随着电动汽车越来越多的采用交流电机，为了提供交流电和控制汽车动力输出的能量，从电池来的直流电必须进行复杂的能源转换。纯电动汽车的主要缺点是电池能源有限，而混合电动汽车的复杂的动力系统是困扰其质量提高和成本的居高不下的原因。
