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Currently electric vehicles are introduced in public transport and individual traffic in order to reduce for example the noise and the green house gas emissions. Beside the advantage of higher traction drive efficiency the main disadvantage of electric vehicles compared to vehicles with conventional drive is the shorter operating distance. This is caused by the comparatively low energy density of...
A technique capable of identifying electric vehicle (EV) mass in real-time has been a topic of research for several years due to the advantages it presents, such as the ability to dramatically improve range estimates, perform more effective torque vectoring for ABS/ESC, track delivery vehicle weight, etc. Some crucial issues in mass identification impede an easy implementation of such an algorithm,...
Hybrid under-actuated control for the autonomous dynamic balance of a running electrical bicycle including frictional torque and motor dynamics is developed, where includes two control inputs: steering and pendulum voltages, and three system outputs: steering, lean and pendulum angles. Due to the under-actuated feature, two novel reference signals using three system outputs are designed so that the...
So far, the authors' group have developed a pitching control method for electric vehicle (EV) based on the quick torque response of motors in order to improve the driving comfort. In this paper, a novel estimation method of braking torque is proposed to generate ideal vehicle acceleration for pitching control. The acceleration reference can be obtained from the estimated braking torque, motor torque,...
Electric motor's controlling algorithm decides bus acceleration ability. Under acceleration and huge resistance condition, electric motor is expected to give peak torque in a short response time. The paper analyzes the principle of the power train based on a permanent magnet DC motor with an augment-winding, develops a transient mathematical model of electric motor drive system in the acceleration...
A novel power assisted steering system was proposed in this paper, due to the independent driving characteristics of electric vehicle (EV) with four-wheel-independent-drive. The basic theory of differential drive torque assisted steering is discussed at first. After that, vehicle dynamics model with steering system was built in SIMULINK, and the control strategy for minimizing the difference between...
In this article is proposed an approach to study electric vehicles based on an experimental platform that adequately reproduces the behavior of electric vehicles by obtaining the correct equivalences between a vehicle and a test bench. In the first part the general dynamic equation of movement of a vehicle is stated, then how to obtain an equivalent dynamic equation for the test bench that represents...
Sizing the drive system is a major task in electric traction design. To reach this goal, we have chosen an approach using power efficiency criteria minimization by iterative procedure. To start with, this study proposes a statistical analysis of electric vehicle (EV) mission for establishment of power and base speed of drive system motorization. The result is considered an initial step in drive system...
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