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It has been observed that adoption of different possible switching patterns/schemes affects the transient behaviours such as phase current and torque of a PMBLDC motor. Four possible switching patterns are achieved by modulating only upper/lower switches and incoming/outgoing phase switches. For the purpose of control of PMBLDC motor low cost ATMEGA 32 micro-controller is used to generate all the...
The paper is concerned with a vehicle where each front wheel is equipped with a steering equipment. Aim of the paper is to analyze the behavior of the resulting driving apparatus during the steering maneuver in order to subsequently develop a suitable control system. The analysis is carried out in two stages, termed kinematic and dynamic. The kinematic analysis describes the steering maneuver when...
The paper is concerned with the development of the propulsion system for two Light Electric Vehicles (LEVs), namely a city scooter and an electric bicycle. The propulsion system of the city scooter consists of a wheel motor for the traction and a lithium-ion battery for the energy storage. The propulsion system of the electric bicycle utilizes a fuel cell assisted by a supercapacitor bank for the...
The paper presents the activities ongoing in the framework of a two-year Italian National Research Project aimed at developing a distributed Driving and Steering (DaS) system for Electric Vehicles (EVs). The system is built up around an actuation module embedding a rotary-linear motor and including a power converter and a local Electronic Control Unit (ECU) to supply and control the motor. The actuation...
Z-source inverters (ZSIs) supply AC loads from a DC source and boost the voltage of the DC source in a single stage. Such an ability is much needed in electric vehicles where the rated voltage of the traction motors is usually higher than the voltage generated by the onboard DC sources. Being the technological trend in the traction drives directed toward the employment of PM brushless motors, the...
Summary form only given. The lecture deals with the recent activities carried out in the Laboratory of Industrial Automation of the University of Padova, Italy, in the field of electric propulsion systems for light vehicles. Two projects are illustrated. The first project has been completed and was concerning with an electric tilting 3-wheel vehicle. The project was aimed at showing the possibilities...
The paper presents the design and the development of an electric tilting three-wheel vehicle. It shows the possibilities offered by the integration of novel mechanical and electrical technologies in the arrangement of a vehicle for a sustainable urban mobility. The vehicle retains the performance of a light internal-combustion vehicle with two or four wheels (acceleration, maximum speed, range) while...
In the steer-by-wire (SbW) system of new generation of vehicles the shaft of the conventional steering equipment is substituted by two electric drives. This article presents two schemes, termed torque and speed schemes, for the control of SbW system. The first scheme, designated with the torque scheme, is derived from the model of the conventional steering equipment, while the second one, designated...
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