Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle

Two-speed gears are used to secure a wide torque-speed range while improving the power efficiency. In electric vehicles (EVs), a simple sleeve mechanism is preferred for gear shifting. This is because, during the speed synchronization process, the propulsion motor can adjust its speed for the new ge...

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Autores principales:	Taeyeon Lee, Kwanghee Nam
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Motor torque control two-speed gear electric vehicle speed synchronization PMSM control and shift shock Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/b2969ec1f1ae40108d9f1f090935ea5e
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id	oai:doaj.org-article:b2969ec1f1ae40108d9f1f090935ea5e
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spelling	oai:doaj.org-article:b2969ec1f1ae40108d9f1f090935ea5e2021-11-24T00:00:41ZTorque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle2169-353610.1109/ACCESS.2021.3127368https://doaj.org/article/b2969ec1f1ae40108d9f1f090935ea5e2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9611296/https://doaj.org/toc/2169-3536Two-speed gears are used to secure a wide torque-speed range while improving the power efficiency. In electric vehicles (EVs), a simple sleeve mechanism is preferred for gear shifting. This is because, during the speed synchronization process, the propulsion motor can adjust its speed for the new gear ratio. For such a purpose, speed controllers are commonly used. Since the torque control is the normal control mode in the vehicle, the control mode should be switched temporarily to the speed control for gear shift and turned back to the torque control mode. It is very onerous, and requires some setting time for each mode change. In this work, a synchronization method is established in the torque control mode. Furthermore, a recursive least squares (RLS) algorithm is utilized to estimate the vehicle parameters, based on which the vehicle speed variation is predicted during the shifting process. This method works satisfactorily on uphill, downhill, rough or smooth asphalt roads without changing the control mode. Experiments were performed on a wheel dynamo system, along with extensive simulation studies.Taeyeon LeeKwanghee NamIEEEarticleMotor torque controltwo-speed gearelectric vehiclespeed synchronizationPMSM control and shift shockElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 153518-153527 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Motor torque control two-speed gear electric vehicle speed synchronization PMSM control and shift shock Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Motor torque control two-speed gear electric vehicle speed synchronization PMSM control and shift shock Electrical engineering. Electronics. Nuclear engineering TK1-9971 Taeyeon Lee Kwanghee Nam Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle
description	Two-speed gears are used to secure a wide torque-speed range while improving the power efficiency. In electric vehicles (EVs), a simple sleeve mechanism is preferred for gear shifting. This is because, during the speed synchronization process, the propulsion motor can adjust its speed for the new gear ratio. For such a purpose, speed controllers are commonly used. Since the torque control is the normal control mode in the vehicle, the control mode should be switched temporarily to the speed control for gear shift and turned back to the torque control mode. It is very onerous, and requires some setting time for each mode change. In this work, a synchronization method is established in the torque control mode. Furthermore, a recursive least squares (RLS) algorithm is utilized to estimate the vehicle parameters, based on which the vehicle speed variation is predicted during the shifting process. This method works satisfactorily on uphill, downhill, rough or smooth asphalt roads without changing the control mode. Experiments were performed on a wheel dynamo system, along with extensive simulation studies.
format	article
author	Taeyeon Lee Kwanghee Nam
author_facet	Taeyeon Lee Kwanghee Nam
author_sort	Taeyeon Lee
title	Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle
title_short	Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle
title_full	Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle
title_fullStr	Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle
title_full_unstemmed	Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle
title_sort	torque control based speed synchronization for two-speed gear electric vehicle
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/b2969ec1f1ae40108d9f1f090935ea5e
work_keys_str_mv	AT taeyeonlee torquecontrolbasedspeedsynchronizationfortwospeedgearelectricvehicle AT kwangheenam torquecontrolbasedspeedsynchronizationfortwospeedgearelectricvehicle
_version_	1718416115588136960

Torque Control Based Speed Synchronization for Two-Speed Gear Electric Vehicle

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