Electrical Machine Research Papers - Academia.edu (original) (raw)
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An electrical machine was designed for an energy storage flywheel in a load-levelling system for a city bus. This machine has a slotless stator, and was designed by the use of analytical field calculations. The calculation of the field... more
An electrical machine was designed for an energy storage flywheel in a load-levelling system for a city bus. This machine has a slotless stator, and was designed by the use of analytical field calculations. The calculation of the field due to the current distribution in the airgap forms the main contribu- tion of this paper. The results of the analytical field calculations are verified with the finite element method (FEM). The work described in this paper forms part of a research project into the energy storage part of a load-levelling sys- tem for city busses and light rail vehicles. The specified stored energy is 7.2 MJ usable with an output power of 200 kW continuous. Fig. 1 shows a block diagram of the electri- cal system of the city bus. The internal combustion engine turns the shaft of a dc generator. This dc current is processed by a dc-dc converter to drive a traction motor when the vehi- cle is driven. The flywheel energy storage unit is connected to the dc bus via a bidire...
- by Urban Lundin and +1
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- Engineering, Technology, Finite Element Analysis, Computer Simulation
In this paper the authors present a two-step algorithm for predicting the core losses in an electrical machine. As a first step, the flux patterns in the cross section of the machine are calculated by using a time stepped two-dimensional... more
In this paper the authors present a two-step algorithm for predicting the core losses in an electrical machine. As a first step, the flux patterns in the cross section of the machine are calculated by using a time stepped two-dimensional finite element (FE) model, neglecting hysteresis and eddy currents in the laminated core. The second step consists in enforcing the calculated tooth and yoke flux waveforms to a one-dimensional FE lamination model in which the variation along the thickness of the induction and of the induced eddy currents is considered. The hysteretic behavior of the ferromagnetic material is taken into account by, means of a rate-dependent Preisach model. The outlined procedure is applied to a 3 kW squirrel-cage induction motor with either open or closed rotor slots, the former yielding elevated flux harmonics. Computation results and measurements at no-load (phase currents, stator tooth flux, and total iron losses) are compared.
- by L. Dupre and +1
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- Engineering, Finite element method, Finite Element, Magnetic field
The Switched reluctance Motor (SRM) is an old member of the Electric Machines Family. Its simple structure, ruggedness and inexpensive manufacturing capability make it more attractive for Industrial applications. However these merits are... more
The Switched reluctance Motor (SRM) is an old member of the Electric Machines Family. Its simple structure, ruggedness and inexpensive manufacturing capability make it more attractive for Industrial applications. However these merits are overshadowed by its inherent high torque ripple, acoustic noise and difficulty to control. In this work Design, modeling, simulation and analysis of Switched Reluctance motor has been done. Various models of Switched reluctance Motor Linear and nonlinear model with different control strategies are simulated in MATLAB/SIMULINK. The control strategies used are PI Control, Hysteresis Control and voltage control. The result obtained from simulation has been verified practically. The control signal and circuit design for operation of a Switched Reluctance Motor (SRM) drive has been described. The control circuit has been realized using microcomputer system. The technique developed is suitable for implementation with recent DSP processors. The result obta...
6 TH INTERNATIONAL CONFERENCE ON ELECTROMECHANICAL AND POWER SYSTEMS ... ON THE DESIGN OF THE MODULAR LINEAR TRANSVERSE FLUX RELUCTANCE MOTORS ... Dan-Cristian POPA, Vasile IANCU, Ioan-Adrian VIOREL, Loránd SZABÓ
ABSTRACT Homopolar generators are a particular class of electrical machines capable of generating DC current without the use of mechanical commutators or electronic rectifiers. This paper presents an overview of the typical configurations... more
ABSTRACT Homopolar generators are a particular class of electrical machines capable of generating DC current without the use of mechanical commutators or electronic rectifiers. This paper presents an overview of the typical configurations of homopolar DC machines. The paper focuses on generating operation, trying to assess the optimal configuration for a high efficiency generator. Among the possible solutions, a specific configuration which uses permanent magnets for the excitation field was chosen and built to perform a set of experiments.
- by Carlo Concari and +1
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- Electrical Machine, High Efficiency
The paper presents a new double layer three phase 4 to 6 pole-changing winding, with 48 slots and 6 terminals. In order to obtain a higher fundamental winding factor when winding is 6-pole connected, a degree of asymmetry is accepted for... more
The paper presents a new double layer three phase 4 to 6 pole-changing winding, with 48 slots and 6 terminals. In order to obtain a higher fundamental winding factor when winding is 6-pole connected, a degree of asymmetry is accepted for the winding when 4-pole connected. The new winding is compared with a well known two-layer winding presented in literature.
Modern electric actuators or generators are inherently mechatronic systems. They are mechanical things that exploit electromagnetic principles for energy conversion, power electronics for conversion optimization, sensors and control... more
Modern electric actuators or generators are inherently mechatronic systems. They are mechanical things that exploit electromagnetic principles for energy conversion, power electronics for conversion optimization, sensors and control electronics. We present a synthesis of electromagnetic energy conversion, then we give two examples leading to of research works of electrical engineering and mechanical staffs. These examples are a flywheel energy storage
Modern electric actuators or generators are inherently mechatronic systems. They are mechanical things that exploit electromagnetic principles for energy conversion, power electronics for conversion optimization, sensors and control... more
Modern electric actuators or generators are inherently mechatronic systems. They are mechanical things that exploit electromagnetic principles for energy conversion, power electronics for conversion optimization, sensors and control electronics. We present a synthesis of electromagnetic energy conversion, then we give two examples leading to of research works of electrical engineering and mechanical staffs. These examples are a flywheel energy storage
- by Pascal Brochet and +1
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- Finite element method, Finite Element, Machine Design, Design Tool
This paper gives an overview of nowadays used simulation models and measurement methods in order to determine iron losses in electrical machinery. The paper provides machine designers and system engineers with an overview of suitable iron... more
This paper gives an overview of nowadays used simulation models and measurement methods in order to determine iron losses in electrical machinery. The paper provides machine designers and system engineers with an overview of suitable iron loss models applicable for the machine design process and simulations. Furthermore, possible methods for iron loss measurements in electrical machines are presented from ongoing research projects. Besides standard electrical power measurements, iron losses are determined by thermal and magnetic property measurements, taking into account different {IEC} and {IEEE} standards. The goal is to emphasize the different possibilities of iron loss measurement methods and possible application areas for electrical machinery.