scholarly journals Electromagnetic simulation of an external rotor PM hub motor power device for distributed driving electric vehicle

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096652
Author(s):  
Qiping Chen ◽  
Yue Tian ◽  
Chuanjie Liao ◽  
Sheng Kang ◽  
Ning Wang
Keyword(s):  
Electric Vehicle ◽  
Damping Coefficient ◽  
Power Device ◽  
Viscous Damping ◽  
Motor Power ◽  
Analysis Model ◽  
Performance Requirements ◽  
Split Ratio ◽  
Steady State Simulation ◽  
External Rotor

In order to increase efficiency and reliability of hub motor power device for distributed driving electric vehicle, a novel hub motor with an external rotor PM (permanent magnet) is designed and optimized. The performance parameters of hub motor are computed and selected based on vehicle dynamics indicators and the driving equations. This paper determines the optimum primary size of hub motor by choosing appropriate magnetic circuit structure and integrating three key parameters, including as stator split ratio, electromagnetic load and viscous damping coefficient. This paper has built the analysis model of external rotor PM hub motor, and simulated and analyzed the transient magnetic field of hub motor under no-load and load transient or steady state. Simulation results indicate that the external rotor PM hub motor designed by combining stator split ratio, electromagnetic load and viscous damping coefficient has satisfactory electromagnetic performance, which can satisfy the performance requirements and indicators of hub motor power device for distributed driving electric vehicles.

Investigation of Parameter Effect to Performance of Battery's Cooling System

2012 ◽  
Vol 538-541 ◽  
pp. 2015-2019
Author(s):  
Zhen Zhe Li ◽  
Xiao Ming Pan ◽  
Ming Ren ◽  
Mei Qin Li ◽  
Gui Ying Shen
Keyword(s):  
Energy Consumption ◽  
Fuel Cell ◽  
Numerical Model ◽  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Cooling System ◽  
Analysis Model ◽  
Hybrid Electric

With the heightened concern for energy consumption and environment conservation, the interest on fuel cell HEV (hybrid electric vehicle) has been greatly increased. In this study, a numerical model for the cooling system of batteries was constructed. Using the constructed analysis model, the material of the cartridge and the cartridge width were checked for improving the performance of the cooling system of batteries. The performance was changed by using different cartridge material, and the cartridge width also has an effect to the performance of the cooling system of batteries as shown in the analysis results. The constructed model and method can be used to investigate the performance of the cooling system of batteries.

scholarly journals Damping Force and Loading Position Dependence of Mass Sensitivity of Magnetoelastic Biosensors in Viscous Liquid

Sensors ◽  
2018 ◽  
Vol 19 (1) ◽  
pp. 67
Author(s):  
Kewei Zhang ◽  
Zhe Chen ◽  
Qianke Zhu ◽  
Yong Jiang ◽  
Wenfeng Liu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Damping Coefficient ◽  
Viscous Damping ◽  
Simulation Approach ◽  
Damping Force ◽  
Mass Sensitivity ◽  
High Order Resonance ◽  
Target Loading ◽  
Position Dependence ◽  
Different Order

We established the vibration governing equation for a magnetoelastic (ME) biosensor with target loading in liquid. Based on the equation, a numerical simulation approach was used to determine the effect of the target loading position and viscous damping coefficient on the node (“blind points”) and mass sensitivity (Sm) of an ME biosensor under different order resonances. The results indicate that viscous damping force causes the specific nodes shift but does not affect the overall variation trend of Sm as the change of target loading position and the effect on Sm gradually reduces when the target approaches to the node. In addition, Sm decreases with the increase of viscous damping coefficient but the tendency becomes weak at high-order resonance. Moreover, the effect of target loading position on Sm decreases with the increase of viscous damping coefficient. Finally, the results provide certain guidance on improving the mass sensitivity of an ME biosensor in liquid by controlling the target loading position.

Design and Analysis of a Series Hybrid Electric Vehicle for Indian Conditions

2012 ◽  
Author(s):  
C. S. Nanda Kumar ◽  
Shankar C. Subramanian
Keyword(s):  
Electric Vehicle ◽  
Electric Vehicles ◽  
Electric Motor ◽  
Hybrid Electric Vehicle ◽  
Traction Force ◽  
Drive System ◽  
Maximum Speed ◽  
Performance Requirements ◽  
Series Hybrid Electric Vehicle ◽  
Hybrid Electric

Electric and hybrid vehicles are emerging rapidly in the automotive market as alternatives to the traditional Internal Combustion Engine (ICE) driven vehicles to meet stringent emission standards, environmental and energy concerns. Recently, Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs) have been introduced in many countries including India. One configuration of a HEV is the Series Hybrid Electric Vehicle (SHEV). The design and analysis of the drive system of a SHEV under Indian conditions is the focus of this paper. In conventional vehicles, the ICE is the power source that drives the vehicle. The energy from the ICE is distributed to the wheels through the transmission, which is then used to generate the traction force at the tyre-road interface. In a HEV, both the engine and the electric motor provide the energy to drive the vehicle. In a SHEV, the energy generated by the electric motor is transmitted through the transmission to meet the torque demand at the wheels. Based on the driver’s acceleration demand and the state of charge of the battery, the controller manages the ICE, the generator and the battery to supply the required energy to the motor. The motor finally develops the required drive torque to generate the traction force at the wheels to meet the vehicle drive performance requirements like gradeability, acceleration and maximum speed. The objective of this paper is to discuss the design of the drive system of a SHEV. This involves the calculation of the power specifications of the electric motor based on the vehicle drive performance requirements. The equations for performing these calculations are presented. The procedure is then demonstrated by considering a typical Indian commercial vehicle along with its typical vehicle parameter values. A simulation study has also been performed by considering the Indian drive cycle to demonstrate the energy savings obtained by the use of a SHEV.

An Alternative Procedure for Selection of Induction Motor for Electric Vehicle Application

2019 ◽  
Vol 16 (8) ◽  
pp. 3351-3358
Author(s):  
Jyothi P. Phatak ◽  
L. Venkatesha ◽  
C. S. Raviprasad
Keyword(s):  
Induction Motor ◽  
Electric Vehicle ◽  
Conventional Method ◽  
Driving Cycle ◽  
Vehicle Design ◽  
Alternative Procedure ◽  
Vehicle Performance ◽  
Performance Requirements ◽  
Selection Of ◽  
Significant Factors

The selection of motor is one of the significant factors in Electric Vehicle design. When the motor is selected based on the conventional method, its performance during starting of the EV is met but it may fail in other operating regions of the driving cycle. This is because, acceleration requirements assume zero initial speed conditions and the requirements with different initial speeds is not accounted in the conventional method. This paper discusses an alternative procedure to compute the ratings of induction motor. The preliminary method to compute the ratings is carried out based on vehicle performance requirements. The improvisation techniques in the computation are then adopted to get required acceleration and transient torque capabilities of motor to meet the driving cycle requirements. The procedure is illustrated through simulation studies using MAT lab software.

Force Behavior of Parallel Double Coupling Beams with Different Width

2014 ◽  
Vol 578-579 ◽  
pp. 707-710
Author(s):  
Ming Li ◽  
Ji Guang Chen ◽  
Wei Jian Zhao ◽  
Li Guo Wang
Keyword(s):  
Finite Element ◽  
Energy Dissipation ◽  
Damping Coefficient ◽  
Viscous Damping ◽  
Coupling Beams ◽  
Equivalent Viscous Damping ◽  
Dissipation Coefficient ◽  
Finite Element Software ◽  
Double Coupling ◽  
Energy Dissipation Coefficient

The force behavior of parallel double coupling beams (PDCB) with different width is analyzed, based on which the feasibility of this kind of beams is discussed. The loading process of the PDCB is simulated by using finite element software ABAQUS. By analyzing the hysteretic loops, skeleton curves, energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient,the bearing capacity and seismic performance of the PDCB is studied. Through simulation, it shows that the hysteretic loops is plump, and the energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient of this double beams is high. It can be concluded that the PDCB has good force behavior, and the beams of PDCB can work in coordination.

NONDIMENSIONAL ANALYSIS OF ANNULAR DUCT FLOW IN MAGNETORHEOLOGICAL/ELECTRORHEOLOGICAL DAMPERS

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1577-1583 ◽  
Author(s):  
JIN-HYEONG YOO ◽  
NORMAN M. WERELEY
Keyword(s):  
Quadratic Equation ◽  
Damping Coefficient ◽  
Viscous Damping ◽  
Uniform Field ◽  
Duct Flow ◽  
Equivalent Viscous Damping ◽  
Performance Metric ◽  
Annular Duct ◽  
Er Damper ◽  
Analytical Expressions

Approximate analytical expressions describing MR/ER damper performance for an axisymmetric annular duct under the assumption of uniform field are presented. The key performance metric is the damping coefficient, which is the ratio of the equivalent viscous damping constant, Ceq, to the Newtonian viscous damping constant, C. To develop these approximations, a quadratic equation was used to approximate the center of the plug location in the annular duct. This equation simplified the calculation of the annular duct solution without resorting to numerical methods to solve the boundary value problem. Approximations for the damping coefficient are developed on this basis.

Analysis of the Novel Two-Speed Uninterrupted Transmission With Centrifugal Clutch for Electric Vehicle

2015 ◽  
Author(s):  
Haijun Song ◽  
Jian Song ◽  
Shengnan Fang ◽  
Yuzhuo Tai ◽  
Fei Li ◽  
...  
Keyword(s):  
Simulation Model ◽  
Electric Vehicle ◽  
Dynamic Characteristics ◽  
Transmission System ◽  
The Novel ◽  
Motor Power ◽  
Traction Motor ◽  
Single Row ◽  
Utilization Ratio ◽  
Electric Traction

Current research suggests that the performance of electric vehicle with a single-speed transmission can still be widely improved. The novel two-speed uninterrupted transmission consists of a single-row planetary, a centrifugal clutch, a brake, and two motor controlling clutch and brake. Changing the switch of clutch and brake can achieve two-speed uninterrupted gearshifts. Different from the traditional centrifugal clutch, a novel adjustable device is specifically designed to control the switch of clutch. Torque characteristics of clutch prototype are displayed. Some differences of the gearshift methodology are specifically designed to compensate for the characteristics of the electric traction motor and the adjustable centrifugal clutch. The specific simulation model is established according to the novel uninterrupted transmission prototype. The dynamic characteristics of the two-speed uninterrupted transmission system are analyzed. The higher utilization ratio of the traction motor power increases the efficiency of the traction motor with the novel two-speed uninterrupted transmission.

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