Traditional vehicles are modified to add a motor on them instead of IC engine. The original clutch and gear box are retained (Figure 7.1a). In new design, the transmission between the motor and the drive wheels usually has one or two stages of fixed-ratio reduction gear (Figure 7.1b-e). For most current electric cars, the transmission has a singlestage reduction gear to provide the vehicle with the required hill-climbing capability and the desired maximum speed. In the design as shown Figure7.1d-f, the differential is eliminated with two motors used. The design as shown in Figure 7.1c is widely used because of its more compact construction, easer installation and simpler control.
动力换档 传动轴 选档式变速器 轮式和履带式专用车辆
专用车辆 功率合成齿轮箱 级联电动机，双电动机 轮毂驱动
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
7.1.1 Layout of Battery Electric Vehicles Drives纯电动汽车的传动布 置
-The central motor acting on a conventional axle drive via a gearbox assembly for speed adjustment, preferably a planetary gearbox; fixed ratio. Application: city buses (Figure 7.3b). Possible alternative: design with tandem motors with two planetary gearboxes and a summarising gearbox (Figure 7.3d).
Figure 7.3 Schematic design types for traction motor applications a direct central motor; c tandem motors with summarising gear
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
本章学习目标
1. 掌握电动汽车传动布置的应用及蓄电池的设计原则； 2. 了解数学建模；本章难点重点来自重点：不同传动布置的应用
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
New Words and Phrases
hull modify proximity relevance
Chapter 7 Design Aspects of Electric Vehicles 电动汽车设计概略
本章学习内容
7.1 Layout of Electric Vehicles Drives电动汽车 的传动布置 7.2 Design Criteria of Batteries 蓄电池设计原则
7.3 Optimization Techniques - Mathematical Modeling 优化技术-数学建模
Figure 7.1 Layout of 7.1 Layout of Electric Vehicles Drives电动汽车的传P动as布se置nger Vehicle
Electric Drives CL clutch; D differential; FG fixed ratio reduction gear; GB gear box; M motor
驱动车轮，驱动轮 固定速比减速机构 齿轮箱 对…有意义 爬坡能力 就…而言 船体内驱动 行星齿轮减速箱
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
power shifting propeller shaft selector transmission special wheeled and tracked vehicle special-purpose vehicle summarising gearbox tandem motor wheel hub drive
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
-The central motor acting directly on a conventional axle drive; no ratio range. Application: city buses (Figure 7.3a). Possible alternative: design with tandem motors and a summarising gearbox (Figure 7.3c).
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
According to hybridization factor (HF), hybrid drives are current classified into micro hybrid, medium hybrid and full hybrid. Micro and medium hybrids are designed in most cases as parallel hybrids. Full hybrids have been designed as parallel hybrids and power-split hybrids.
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
Figure 7.2 three types of hybrid drives (a) series type; (b) parallel type; (c) power-split (mixed) type BA battery; C/C converter/inverter; CL clutch; E engine; G generator; M/G motor/generator; TR transmission
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
7.1.2 Layout of Hybrid Electric Vehicles Drives 混合动力电动汽车的传动布置
Hybrid drives can be divided into serial hybrid, parallel hybrid and power-split hybrid (also called series-parallel hybrid) drive (Figure 7.2). Serial hybrid is simplest in construction and easiest in control; power-split hybrid is most complicated in construction and control. Nowadays, serial hybrid is mainly used for commercial vehicles and power-split is mainly used for passenger cars.
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
7.1.3 Layout of Commercial Vehicle Serial Hybrid Drives
商用车串联式混合动力的布置
Serial hybrid powertrains have a practical relevance for commercial vehicles. They have no mechanical coupling of the engine to the wheels. The serial hybrid drive has the advantage of being highly flexible in terms of the selection of an electrical energy supply source. For all the drive configurations named, the electric traction motors can be arranged as follows:
[hʌl] ['mɒdɪfaɪ] [prɒk'sɪməti] ['reləvəns]
n.外壳，船壳，船体 vi.修改，改变，改造 n.接近，邻近 n.重要性，意义，相关性
7.1 Layout of Electric Vehicles Drives电动汽车的传动布置
drive wheel fixed-ratio reduction gear gear box have a relevance for hill-climbing capability in terms of in-hull drive planetary gearbox