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3-Speed Transmission Using Dual Motors and One-Way Clutches

机译：使用双电机和单向离合器的3速变速器

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摘要

The use of electric vehicles has begun to increase, and the ratio of electric vehicles will continually increase due to environmental regulations. The speed–torque characteristic of an electric motor is better than that of a combustion engine for vehicle driving due to the high torque in a low-speed range. However, the efficiency of the motor declines in the low-speed range; therefore, when an electric vehicle climbs a steep slope slowly, severe heat may be generated due to the high current in the low-efficiency range. In this regard, for driving at a high efficiency, electric vehicles also require mechanical multispeed transmissions, but a conventional mechanical multispeed transmission is bulky, heavy, and energy consuming. This paper suggests a 3-speed transmission using dual-electric motors and one-way clutches. The transmission has a structure simple enough to be used in an in-wheel drive unit, and it does not have actively moved clutches, resulting in high reliability and eliminating the need for energy to move the clutches during speed changes. The operational principle is explained, and a prototype and its experimental results are presented.
机译：电动汽车的使用已开始增加，并且由于环境法规的原因，电动汽车的比例将不断增加。由于在低速范围内具有高扭矩，因此电动机的速度-转矩特性优于用于车辆驱动的内燃机的速度-转矩特性。但是，电动机的效率在低速范围内下降。因此，当电动车辆缓慢地爬上陡坡时，由于低效率范围内的高电流，可能会产生严重的热量。在这方面，为了高效地驾驶，电动车辆还需要机械多速变速器，但是常规的机械多速变速器体积大，笨重且耗能。本文提出了一种采用双电动机和单向离合器的三速变速器。该变速器具有足以用于轮内驱动单元中的结构，并且没有主动移动的离合器，从而实现了高可靠性，并且消除了在变速过程中移动离合器所需的能量。解释了工作原理，并给出了原型及其实验结果。

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