On the Design of In-Wheel-Hub Motor Transmission Systems with Six-Link Mechanisms for Electric Vehicles

Abstract

Nowadays, there are several electric vehicles (EV) on the market, due to the innovation of technology that promotes new components such as batteries, transmissions, and electric motors. This study proposes the design procedure for the configuration synthesis and simulation of in-wheel-hub motor transmissions with six-link mechanisms. The synthesis process shows six mechanisms with six members and eight joints, 15 new clutchless motor transmissions, and 16 new clutched motor transmissions. A novel motor transmission with the possibility of synthesized configurations is chosen as a case to analyze the working rules connected with the power flow modes and operation modes. Moreover, this design is modeled for the simulation process that generates the results of the operation mode transition and energy regulation.

Design and Analysis of Mechanisms of 7-, 8- and 9-Speed Automatic Transmissions for Vehicle Powertrains

“…The above equations can be written in matrix form as shown in Equation (10) for ease of computer processing. In this form, K is the coefficient matrix of characteristic parameters for kinematic analysis, and P is a constant vector, as shown in Equation (11). W represents the velocity vector, i.e., [ω s1 , ω pc1 , ω r1 , ω s2 , ω pc2 , ω r2 , ω s3 , ω pc3 , ω r3 , ω s4 , ω pc4 , ω r4 ] T .…”

“…Based on the lever diagram of planetary gear sets, Liu et al [10] proposed a configuration design method for multi-speed ATs suitable for single and hybrid inputs. By determining design constraints, Hoang and Yan [11] studied a method for generating electric vehicle transmission mechanisms from 6-link kinematic chains and performed simulations using Matlab/Simulink. Du and Yang [12] proposed an automatic analysis method for structural components and dynamic parameters of multi-input transmission systems under different operating conditions.…”

Studies on Energy Consumption of Electric Light Commercial Vehicle Powered by In-Wheel Drive Modules

“…In some eLCV solutions, a hybrid system in the form of an internal combustion generator is used to increase the range [29]. Another solution (Figure 1b-d) to this limitation is to place the drive motors with inverters in the immediate vicinity of the vehicle wheels and drive them through a transmission or directly via a drive shaft [30]. There are also solutions where electricity is transmitted wirelessly to the motor located in the wheel or its immediate vicinity [31,32].…”

Development of an online adaptive energy management strategy for the novel hierarchical coupled electric powertrain

“…1 The HCEP is composed of the upper coupling layer (the torque coupling between the front and rear axles) and the lower coupling layer (the dual-motor rotation speed coupling in each wheel). The HCEP is promising because of the following two advantages: (1) it integrates the rotation speed coupling and torque coupling, which allows it to expand the efficient working range of distributed drive electric vehicles (DDEVs) in two dimensions of the vehicle speed and torque and to significantly improve the economy of DDEVs; (2) compared with peer powertrains proposed in [2][3] which arrange both the rotational speed coupling and torque coupling in each wheel, the HCEP is simpler in structure. The HCEP utilizes the independence and controllability between the output torque of the front axle and that of the rear axle in DDEVs and moves the torque coupling from inside of wheels to between the front and rear axles; thus, only the rotational speed coupling is arranged in each wheel.…”