Search results for "Counter-electromotive force"

showing 4 items of 4 documents

Back EMF Sensorless-Control Algorithm for High-Dynamic Performance PMSM

2010

In this paper, a low-time-consuming and low-cost sensorless-control algorithm for high-dynamic performance permanent-magnet synchronous motors, both surface and internal permanent-magnet mounted for position and speed estimation, is introduced, discussed, and experimentally validated. This control algorithm is based on the estimation of rotor speed and angular position starting from the back electromotive force space-vector determination without voltage sensors by using the reference voltages given by the current controllers instead of the actual ones. This choice obviously introduces some errors that must be vanished by means of a compensating function. The novelties of the proposed estima…

Brushless machines Control equipments Synchronous motor drives Transducers0209 industrial biotechnologyTest benchEngineeringEstimation theoryAngular displacementbusiness.industry020208 electrical & electronic engineeringControl engineering02 engineering and technologySettore ING-IND/32 - Convertitori Macchine E Azionamenti ElettriciCounter-electromotive force020901 industrial engineering & automationControl and Systems EngineeringControl theoryRobustness (computer science)0202 electrical engineering electronic engineering information engineeringInverterElectrical and Electronic EngineeringSynchronous motorbusinessMachine controlIEEE Transactions on Industrial Electronics
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Field‐circuit analysis of construction modifications of a torus‐type PMDC motor

2003

This paper presents the field‐circuit analysis of a disc‐type torus DC motor with permanent magnets. Calculations of the magnetic field are carried out using the finite element method (FEM) in the 3D space. The integral quantities like the ripple‐cogging torque, back electromotive force, flux linkage, self and mutual inductances of the winding are analyzed. The electromagnetic torque is comparatively determined from the Maxwell stress tensor and co‐energy methods. Based on the 3D magnetic field calculations, the lumped‐parameter model of the tested motor is constructed, taking into account an electronic power converter as well. For comparison, various permanent magnet widths and teeth thick…

Engineeringbusiness.industryStatorApplied MathematicsElectrical engineeringMechanicsMaxwell stress tensorCounter-electromotive forceDC motorFlux linkageComputer Science Applicationslaw.inventionComputational Theory and MathematicsDirect torque controllawMagnetTorqueElectrical and Electronic EngineeringbusinessCOMPEL - The international journal for computation and mathematics in electrical and electronic engineering
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Electromotive Force Generation with Hydrogen Release by Salt Water Flow under a Transverse Magnetic Field

2011

By considering an electrolyte solution in motion in a duct under a transverse magnetic field, we notice that a so called Faraday voltage arises because of the Lorentz force acting on anions and cations in the fluid. When salt water is considered, hydrogen production takes place at one of the electrodes if an electric current, generated by Faraday voltage, flows in an external circuit. The maximum amount of hydrogen production rate is calculated by basic electrochemical concepts.

Materials scienceElectromotive forceElectrolyteCounter-electromotive forcelaw.inventionsymbols.namesakeNuclear magnetic resonancelawsymbolsPhysics::Chemical PhysicsElectric currentAtomic physicsFaraday cageLorentz forceFaraday efficiencyVoltage
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A novel correction method for a low cost sensorless control system of IPMSM electrical drives

2008

In this paper a novel correction method for sensorless Field Oriented Control System of Brushless internal Permanent Magnet Electrical Drives is introduced discussed and experimentally validated. The novelty of this control system is the estimation of rotor speed and angular position is based on the back electromotive force space vector determination, without the aid of voltage probes. Actual voltage signals needed for estimation are replaced with the reference ones given by the current controller. This choice obviously introduces an error that have been vanished by means of a new compensating function or with the aid of data coming from experimental tests. Experimental verifications of the…

Test benchVector controlAngular displacementControl theoryComputer scienceMagnetControl systemTorqueControl engineeringCounter-electromotive forceVoltage2008 IEEE International Symposium on Industrial Electronics
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