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This paper presents a set of system equations of a dual stator induction machine (DSIM) and a new approach for online parameter identification including its verification through simulation and measurements. An uneven current share between the two three-phase systems of a DSIM is used to determine machine parameters online.
Energy saving is arguably the most important factor in issues regarding energy and carbon emission. For electric vehicles in particular, saving energy extends the driving range. This can be achieved with a highly efficient variable-speed drive that can cover a wide speed range, and changing the number of poles is one way of realizing such a drive. In addition, electric vehicles must be fault tolerant...
The most commonly used electrical machine is induction machine since it is durable, easy to manufacture, control, it requires less maintenance, responses different loads. In this study, the design of 115kW (continuous 85kW) squirrel cage induction motor for electric vehicle applications is presented. Main design constraints and performance criteria of the motor is determined and depending on these...
This paper presents regeneration characteristics of a 20-kW class high-temperature superconductor induction /synchronous motor (HTS-ISM). It has experimentally been demonstrated that the HTS-ISM generates synchronous electric power at about rated condition (20 kW), and the corresponding efficiency is more than 90%. The tested characteristics have also been reproduced based on the nonlinear electrical...
This paper presents a comparison between two control techniques: Direct Field-Oriented Control (DFOC) and Second Order Sliding Mode Control (SOSMC), both on real-time implementations. DFOC is one of the most popular control strategies in the industry for induction motor drives and has the advantage to produce a continuous control signal, helping to extend life of electric vehicle batteries. On the...
For an electric vehicle, motor selection is very important as it mainly determine its efficiency, cost and reliability. A particular motor may behave differently under different driving conditions. The driving behavior for an urban and suburban region is represented by its drive cycle. Thus, motor must be analyzed based on different drive cycles. In this paper, analysis of an induction motor for different...
This paper treats a speed-sensorless drive of a three-phase Induction Motor (squirrel-cage). The purpose is to implement an electric traction system, based on the use of IM controlled by power electronic converter. This system allows the speed control of the vehicle, forward, backward and regenerative braking. The four quadrants operation is required. The developed control strategy is based on classical...
In this paper, we propose an experimental study for GIMC (Generalized Internal Model Control) active fault tolerant control design based on fixed H∞ robust approach. The proposed strategy is applied for the induction motor speed drive of electrical vehicle powertrain in presence of fault speed sensors. To adopt the best performance method for electrical vehicle application, we illustrate the effectiveness...
Selection of propulsion motor and design of suitable transmission gear box are significant issue for designing an efficient drive train of a battery operated electric vehicle driving on Indian urban and suburban areas. In this paper we present, selection of Motor among different available electric motors, estimation of base power rating of selected motor, design of suitable gear ratio considering...
The control of the power flow in a vehicle is a preponderant task for the correct vehicle performance. Therefore in this paper is developed the implementation of a fuzzy indirect vector control for the energy management of an EV powertrain. The main energy propulsion unit is a squirrel cage induction motor and the powertrain is simulated as the connections among motor, gear box, energy storage unit...
Research interest in Electric vehicles has grown over the years due to growing environmental concerns, and rising fuel costs. Research into electric cars can draw upon an existing knowledge base of niche electric vehicles, such as specialized trucks and mine shuttles. Existing Electric Mine Shuttle Vehicles (EMSVs) use an Induction Machine (IM) and drive combination. As extensive research into Reluctance...
A three-phase squirrel-cage induction motor is used as a propulsion system of an electric vehicle (EV). The motor is controlled at different operating conditions using a direct torque control (DTC) technique known to have simple control structure with comparable performance. Whereas in a conventional DTC drive, the weakest points is the optimal voltage space vector choice. In this paper Artificial...
This paper deals with a methodology for presizing the induction motor propulsion of an Electric Vehicle (EV). Based on the EV desired performances, the induction motor optimal power can be calculated. The final objective is to find its minimum weight, volume, and cost that meet the design constraints with minimum power under the European urban (ECE-15) and sub-urban (EUDC) driving cycles. The power...
The paper presents a hands free Inductive Power Transfer (IPT) system for charging Electric Vehicle (EV) batteries using a technique called dynamic demand control (DDC). A typical IPT system comprises a power supply, a pair of magnetic pads for wireless power coupling and a power regulator to drive the load as required. DDC enables suitable domestic appliances to assist grid stabilisation by adjusting...
This work presents the modeling of the dynamics of an electric vehicle (EV). Then, by using a typical driving cycle, the parameters for the motor drive system and other drive train components are determined. The proposed drive system is based on an induction motor being supplied by a 3-level NPC inverter. The speed control is based on a constant V/Hz strategy while the inverter is commanded by a Sinusoidal...
Electric vehicles must extremely improve its electric drive system efficiency and effectively use its limited energy. In this paper, a structure diagram of the induction motor in synchronously rotating frame of reference including iron loss is given at first, the losses of induction motor in operation is discussed and an efficiency optimization control strategy of induction motor driving system based...
This paper presents a simple dynamic overmodulation method to obtain a quick dynamic torque response in Direct Torque Control with constant switching frequency (will be referred as DTC-CSF) induction machines. A fast dynamic torque control can be achieved by applying a voltage vector that produces the largest tangential flux component during the transient condition. To perform this, the flux error...
The mechanical property curve, efficiency and speed operation regions of induction traction motor for electric vehicle are introduced here. According to the vehicle's driving characteristic, the motor mechanical property curve is determined. Within the scope of mechanical property region of the motor, the method of regulating motor efficiency region is presented. Within the speed region, the relation...
This paper presents a new approach for operation of an AC motor in electric vehicle due to fault occurrence in the motor drive system. By using the new topology after finding the fault type and rearranging the control method, the motor can operate with lower performance. This paper shows the electric vehicle performance in a faulty mode in comparison with its healthy one for a designed electric vehicle...
The electric vehicle needs the induction motor to run efficiently over the entire speed range, the dynamic torque response should also be good. Based on analyzing vector control and minimum losses control of induction motor, an efficiency optimization strategy of induction motors over wide speed range taking the dynamic torque response into account is presented in the issue. The strategy applies the...
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