Simulation and experimental demonstration of a seamless two-speed automatic mechanical transmission for electric vehicles

NGUYEN Truong Sinh; SONG Jian; FANG Shengnan; SONG Haijun; TAI Yuzhuo; LI Fei

doi:10.16511/j.cnki.qhdxxb.2017.25.053

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (10) : 1106-1113. DOI: 10.16511/j.cnki.qhdxxb.2017.25.053

AUTOMOTIVE ENGINEERING

Simulation and experimental demonstration of a seamless two-speed automatic mechanical transmission for electric vehicles

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Abstract

This paper describes a two-speed automatic mechanical transmission (AMT) for an efficient, uninterrupted powertrain for electric vehicles. This paper describes the transmission structure, which consists of a single planetary gear system, a disk friction clutch and a drum brake that allows seamless shifting between two gears. A dynamic model is given for a front drive wheel powertrain system in an electric vehicle in a MATLAB/Simulink environment that is more suitable for real-time simulations for designing the transmission. A real-time dynamic transmission test bench was setup with a hardware-in-the-loop simulation platform. The simulation and test results indicate that the power interrupt during shifting is eliminated and the transmission significantly improves the electric motor efficiency as well as the vehicle dynamics and energy consumption.

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two-speed transmission / electric vehicle / automatic mechanical transmission (AMT) / test bench / real-time simulation

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NGUYEN Truong Sinh, SONG Jian, FANG Shengnan, SONG Haijun, TAI Yuzhuo, LI Fei. Simulation and experimental demonstration of a seamless two-speed automatic mechanical transmission for electric vehicles[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(10): 1106-1113 https://doi.org/10.16511/j.cnki.qhdxxb.2017.25.053

References

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