Optimization and Model Validation of Operation Control Strategies for a Novel Dual-Motor Coupling-Propulsion Pure Electric Vehicle

Abstract

Abstract:The strict operational condition of driving motors for vehicles propels the development of more complicated configurations in pure electric vehicles (PEVs). Multi-power-source powertrain configurations are one of the efficient technologies to reduce the manufacturing difficulty of driving motors. However, most of the existing studies are predominantly focused on optimal designs of powertrains and power distribution between the engine and motor of hybrid electric vehicles, which are not appropriate for PEVs. This paper proposes a novel dual-motor coupling-propulsion powertrain system that improves the dynamic and economic performance of the powertrain system in PEVs. The proposed powertrain system can realize both the single-motor driving mode and dual-motor coupling driving mode. The driving modes are divided and a power distribution strategy for the different driving modes based on an optimal system efficiency rule is employed, which enhances the performance of the proposed system. Further, a mode-switching strategy that ensures driving comfort by preventing jerk during mode switching is incorporated into the system. The results of comparative evaluations that were conducted using a dual-motor electric vehicle model implemented in MATLAB/Simulink, indicate that the mileage and dynamic performance of the proposed powertrain system are significantly better than those of the traditional single-motor powertrain system.

Energy management strategy based on driving pattern recognition for a dual‐motor battery electric vehicle

“…The mode switching is primarily used to select the most suitable drive mode according to the target speed and torque of the vehicle. To construct a rational mode switching strategy that enables the motor to operate more often in its high‐efficiency region, the strategy developed in this paper is based on the following principles, with the results shown in Table : Motor M1 needs to meet the steady‐state torque requirement of the vehicle and work under most of the driving conditions. Motor M2 is mainly used for auxiliary power and to regulate speed in SC mode and needs to satisfy the transient torque requirements of the vehicle. Therefore, a motor that can provide medium speed for a relatively wide speed range is appropriate. When the drivetrain is in SM1 mode, the high‐efficiency operating region of motor M1 should cover speeds of 30 to 60 km/h and a required torque range of 300 to 500 N·m to the maximum extent possible. When the drivetrain is in SM2 mode, the high‐efficiency operating region of M2 should cover speeds of 0 to 30 km/h and a required torque range of 0 to 300 N·m to the maximum extent possible. …”

“…The mode switching is primarily used to select the most suitable drive mode according to the target speed and torque of the vehicle. To construct a rational mode switching strategy that enables the motor to operate more often in its high-efficiency region, the strategy developed in this paper is based on the following principles, 27 with the results shown in Table 14: 1. Motor M1 needs to meet the steady-state torque requirement of the vehicle and work under most of the driving conditions.…”

“…In this paper, the DMCD presented in literature is taken as the research object. This drivetrain can operate in four different drive modes by controlling the engagement and disengagement of the clutches C1, C2, and C3 and the brake B.…”

Research on the Energy-Saving Strategy of Path Planning for Electric Vehicles Considering Traffic Information

“…The development of electric vehicles (EVs) can effectively solve environmental pollution, improve urban air quality, and alleviate energy shortage pressure [1,2]. However, the drivers are often plagued by EV mileage anxiety, which affects the driving experience due to the limitation of power battery capacity and worrying about the unknown energy consumption on future road segments [3]. The driving range of the remaining energy of the power battery is generally estimated based on the new european driving cycle (NEDC) [4] and the path planning method commonly used in EVs in travel navigation is based on the shortest travel route [5].…”

Stabilization and Speed Control of a Permanent Magnet Synchronous Motor with Dual-Rotating Rotors

“…Similarly, for the PMSM with dual-rotating rotors, each rotor's rotation speed should also be synchronized with the magnetic field rotation speed. For the multiple induction motors system, scholars have adopted different control methods to guarantee the stability in existing studies [7][8][9][10][11][12]. Scholars have also studied the stability and speed synchronization of the multiple PMSMs system.…”