scholarly journals Synthesis and Identification of Optimal Motion Models of an Electric Car with an Induction Traction Motor on the Slopes and Rises of the Road

2021 ◽  
Vol 155 (2) ◽  
pp. 37-44
Author(s):  
V. V. Horeniuk ◽  
Keyword(s):  
Optimal Motion ◽  
Traction Motor ◽  
The Road ◽  
Motion Models ◽  
Electric Car

scholarly journals DIMENSIONAREA SISTEMULUI DE PROPULSIE AL UNUI VEHICUL ELECTRIC. STUDIU DE CAZ

2021 ◽  
Vol 2020 (1) ◽  
pp. 1-14
Author(s):  
Alexandru TURCANU ◽  
Leonard-Călin-Valentin DOBRE
Keyword(s):  
Traction Force ◽  
Rolling Resistance ◽  
Resistance Coefficient ◽  
Gear Ratio ◽  
Calculation Model ◽  
The Road ◽  
Electric Car ◽  
Resistive Forces ◽  
Wheel Radius ◽  
Resistance Forces

This paper aims to present to readers concrete mathematical models, transposed into simulation schemes, to calculate the forces acting on a car at its interaction with the road and the atmosphere, to properly size the electric motor and batteries of an electric car. For the calculation of these forces, a table with predefined values ​​such as vehicle mass, rolling resistance coefficient, gear ratio, wheel radius, was used throughout the work. In the second section of the paper, the values ​​of the resistance forces that oppose the movement of the vehicle and the traction force necessary to overcome these resistive forces were determined. The mathematical calculation model was compiled in Matlab and the graphs in figures 3-9 were obtained.

scholarly journals Design of a direct current motor with a windingless rotor for electric vehicles

2021 ◽  
Vol 4 (5(112)) ◽  
pp. 41-50
Author(s):  
Dmytro Ivliev ◽  
Volodymyr Kosenkov ◽  
Oleksandr Vynakov ◽  
Elvira Savolova ◽  
Viktoria Yarmolovych
Keyword(s):  
Electric Vehicles ◽  
Permanent Magnets ◽  
High Price ◽  
Electromagnetic Excitation ◽  
Active Materials ◽  
Synchronous Motors ◽  
The Road ◽  
Electric Car ◽  
On The Road ◽  
The Cost

Modern electric vehicles typically exploit synchronous motors with magnetoelectric excitation as traction engines. While possessing a series of undeniable advantages, the synchronous motor has one significant drawback ‒ the high cost predetermined by the high price of permanent magnets. In addition, the impossibility to disable a magnetic field in case of engine malfunction can lead to an emergency on the road. Given this, there is a need to design new structures of electrical machines with electromagnetic excitation. The structure of a DC traction motor with electromagnetic excitation involving the rotor or stator segmentation makes it possible to considerably weaken the field of the armature transverse reaction by decreasing magnetic conductivity of the magnetic circuit in the transverse direction. Therefore, such a structure lacks commutating poles and a compensation winding. There are no permanent magnets in the structure, all windings are stationary, an electronic switch is used instead of a collector, and a windingless low-inertia rotor does not require additional measures to remove heat. That all has made it possible to significantly reduce the cost of active materials for the traction engine and improve its reliability. To test the performance of the new design, a full-size model of the engine and a working experimental prototype were fabricated. Applying a synchronous jet engine with magnetization for the BMW i3 electric car as an analog, the engine calculations were performed and its simulation was carried out. The results of the analysis show that the mass of the new engine is 35 % greater than the mass of the analog but the cost of active materials is less than that of the analog by 63 %. The results testify to the possibility of implementing a given structure industrially

Seeking to uncover biology's chemical roots

2019 ◽  
Vol 3 (5) ◽  
pp. 435-443 ◽  
Author(s):  
Addy Pross
Keyword(s):  
Environmental Changes ◽  
Biological Systems ◽  
Significant Development ◽  
The Road ◽  
Physical Chemical ◽  
Systems Chemistry ◽  
Biological World ◽  
Inanimate Matter ◽  
The Origin Of Life ◽  
Opening Up

Despite the considerable advances in molecular biology over the past several decades, the nature of the physical–chemical process by which inanimate matter become transformed into simplest life remains elusive. In this review, we describe recent advances in a relatively new area of chemistry, systems chemistry, which attempts to uncover the physical–chemical principles underlying that remarkable transformation. A significant development has been the discovery that within the space of chemical potentiality there exists a largely unexplored kinetic domain which could be termed dynamic kinetic chemistry. Our analysis suggests that all biological systems and associated sub-systems belong to this distinct domain, thereby facilitating the placement of biological systems within a coherent physical/chemical framework. That discovery offers new insights into the origin of life process, as well as opening the door toward the preparation of active materials able to self-heal, adapt to environmental changes, even communicate, mimicking what transpires routinely in the biological world. The road to simplest proto-life appears to be opening up.

Community Colleges: Vital Partners on the Road to Diversity

ASHA Leader ◽  
2006 ◽  
Vol 11 (5) ◽  
pp. 14-17 ◽  
Author(s):  
Shelly S. Chabon ◽  
Ruth E. Cain
Keyword(s):  
Community Colleges ◽  
The Road ◽  
On The Road

The Role of Crushes on the Road to Autonomy

2009 ◽  
Vol 43 (9) ◽  
pp. 18-19
Author(s):  
MICHAEL S. JELLINEK
Keyword(s):  
The Road ◽  
On The Road
Sign in / Sign up

Export Citation Format

Share Document