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http://hdl.handle.net/10985/7315
Flux Weakening Strategy Optimization for Five-Phase PM Machine with Concentrated Windings
JILIN, Gong; ASLAN, Bassel; SEMAIL, Eric; GILLON, Frédéric
The paper applies an Efficient Global Optimization method (EGO) to improve the efficiency, in flux weakening region, of a given 5-phase Permanent Magnet (PM) machine. An optimal control for the four independent currents is thus defined. Moreover, a modification proposal of the machine geometry is added to the optimization process of the global drive. The effectiveness of the method allows solving the challenge which consists in taking into account inside the control strategy the eddy-current losses in magnets and iron. In fact, magnet losses are a critical point to protect the machine from demagnetization in flux-weakening region. But these losses, which highly depend on magnetic state of the machine, must be calculated by Finite Element Method (FEM) to be accurate. The FEM has the drawback to be time consuming. It is why a direct optimization using FEM is critical. EGO method, using sparingly FEM, allows to find a feasible solution to this hard optimization problem of control and design of multi-phase drive.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10985/73152012-01-01T00:00:00ZJILIN, GongASLAN, BasselSEMAIL, EricGILLON, FrédéricThe paper applies an Efficient Global Optimization method (EGO) to improve the efficiency, in flux weakening region, of a given 5-phase Permanent Magnet (PM) machine. An optimal control for the four independent currents is thus defined. Moreover, a modification proposal of the machine geometry is added to the optimization process of the global drive. The effectiveness of the method allows solving the challenge which consists in taking into account inside the control strategy the eddy-current losses in magnets and iron. In fact, magnet losses are a critical point to protect the machine from demagnetization in flux-weakening region. But these losses, which highly depend on magnetic state of the machine, must be calculated by Finite Element Method (FEM) to be accurate. The FEM has the drawback to be time consuming. It is why a direct optimization using FEM is critical. EGO method, using sparingly FEM, allows to find a feasible solution to this hard optimization problem of control and design of multi-phase drive.Signal-based Technique for Fault Detection and Isolation of Inverter Faults in Multi-phase Drives
http://hdl.handle.net/10985/6817
Signal-based Technique for Fault Detection and Isolation of Inverter Faults in Multi-phase Drives
MEINGUET, Fabien; SANDULESCU, Paul; ASLAN, Bassel; LU, Li; NGUYEN, Ngac Ky; KESTELYN, Xavier; SEMAIL, Eric
A method for fault detection and isolation is proposed and applied to inverter faults in multi-phase drives. An analysis of simulations in faulty conditions leads to the derivation of suitable fault indices. These are based on the unbalance of the phase currents and their instantaneous frequency. The method is applied to a five-phase permanent-magnet synchronous machine drive. Simulations and experiments validate the proposed method.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10985/68172012-01-01T00:00:00ZMEINGUET, FabienSANDULESCU, PaulASLAN, BasselLU, LiNGUYEN, Ngac KyKESTELYN, XavierSEMAIL, EricA method for fault detection and isolation is proposed and applied to inverter faults in multi-phase drives. An analysis of simulations in faulty conditions leads to the derivation of suitable fault indices. These are based on the unbalance of the phase currents and their instantaneous frequency. The method is applied to a five-phase permanent-magnet synchronous machine drive. Simulations and experiments validate the proposed method.Analytical Model of Magnet Eddy-Current Volume Losses in Multi-phase PM Machines with Concentrated Winding
http://hdl.handle.net/10985/6954
Analytical Model of Magnet Eddy-Current Volume Losses in Multi-phase PM Machines with Concentrated Winding
ASLAN, Bassel; SEMAIL, Eric; LEGRANGER, Jerome
this paper studies magnet eddy-current losses in permanent magnet (PM) machines with concentrated winding. First of all, space harmonics of magnetomotive force (MMF) and their influence on magnet losses in electrical machines are investigated. Secondly, analytical model of magnet volume losses is developed by studying the interaction between MMF harmonics wavelengths and magnet pole dimensions. Different cases of this interaction are studied according to the ratio between each harmonic wavelength and magnet pole width (following flux density variation). Then various losses sub-models are deduced. Finally, using this analytical model, magnet volume losses for many slots/poles combinations of 3, 5, and 7 phase machines with concentrated winding are compared. This comparison leads to classify combinations into different families depending on their magnet losses level. Besides, in order to validate the theoretical study, Finite Element models are built and simulation results are compared with analytical calculations.
Thanks to IEEE. The original PDF of the article can be found at: http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6342330&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6342330 MHYGALE, project managed by VALEO-EEM
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10985/69542012-01-01T00:00:00ZASLAN, BasselSEMAIL, EricLEGRANGER, Jeromethis paper studies magnet eddy-current losses in permanent magnet (PM) machines with concentrated winding. First of all, space harmonics of magnetomotive force (MMF) and their influence on magnet losses in electrical machines are investigated. Secondly, analytical model of magnet volume losses is developed by studying the interaction between MMF harmonics wavelengths and magnet pole dimensions. Different cases of this interaction are studied according to the ratio between each harmonic wavelength and magnet pole width (following flux density variation). Then various losses sub-models are deduced. Finally, using this analytical model, magnet volume losses for many slots/poles combinations of 3, 5, and 7 phase machines with concentrated winding are compared. This comparison leads to classify combinations into different families depending on their magnet losses level. Besides, in order to validate the theoretical study, Finite Element models are built and simulation results are compared with analytical calculations.Multi-phase System Supplied by SVM VSI: A New Fast Algorithm to Compute Duty Cycles
http://hdl.handle.net/10985/6998
Multi-phase System Supplied by SVM VSI: A New Fast Algorithm to Compute Duty Cycles
KESTELYN, Xavier; SEMAIL, Eric; HAUTIER, Jean-Paul
Many authors proposed SVM VSI applied to multi-phase drives.
La version éditeur de cette article est disponible à l'adresse suivante : http://www.epe-association.org/epe/index.php
Thu, 01 Jan 2004 00:00:00 GMThttp://hdl.handle.net/10985/69982004-01-01T00:00:00ZKESTELYN, XavierSEMAIL, EricHAUTIER, Jean-PaulMany authors proposed SVM VSI applied to multi-phase drives.Multi-star multi-phase winding for a high power naval propulsion machine with low ripple torques and high fault tolerant ability
http://hdl.handle.net/10985/6975
Multi-star multi-phase winding for a high power naval propulsion machine with low ripple torques and high fault tolerant ability
SCUILLER, Franck; CHARPENTIER, Jean-Frederic; SEMAIL, Eric
In this paper, an original multi-phase Surface Mounted Permanent Magnet (SMPM) Machine designed for naval propulsion is proposed. The design objective of this high power low speed machine is twofold: to enhance the fault tolerance capability of the system and to optimize the quality of the torque by reducing the electromagnetic torque ripples which underlie the acoustic behaviour of the motor and of the global mechanical structure. A low level of ripple torques must also be ensured in faulty operations. To fullfill these constraints, the machine is equipped with a fractional-slot concentrated winding made up of four 3-phase windings each one being star-connected, each star being magnetically shifted by an angle of 15 degrees. This 4-star 3-phase configuration allows to reduce the cogging torque and to separate magnetically and physically the phase windings. The end-turns are also drastically reduced, which improves the compactness and the efficiency of the machine. This original multi-phase machine is supplied by four 3-phase PWM voltage source inverter with sinusoidal current law. The magnetic independences between the four star windings allow a very simple control of the four-star supply and a straightforward fault operating mode. Moreover, this 4-star winding configuration yields to very low torque ripples in nominal configuration (four stars connected) and in faulty operations if two magnetic non adjacent stars are disconnected. For all these reasons, this structure appears particularly suitable for naval propulsion application since it increases the machine performances in terms of compactness, reliability and quality of torque.
La version éditeur est disponible à cette adresse : http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5729185&isnumber=5728974
Fri, 01 Jan 2010 00:00:00 GMThttp://hdl.handle.net/10985/69752010-01-01T00:00:00ZSCUILLER, FranckCHARPENTIER, Jean-FredericSEMAIL, EricIn this paper, an original multi-phase Surface Mounted Permanent Magnet (SMPM) Machine designed for naval propulsion is proposed. The design objective of this high power low speed machine is twofold: to enhance the fault tolerance capability of the system and to optimize the quality of the torque by reducing the electromagnetic torque ripples which underlie the acoustic behaviour of the motor and of the global mechanical structure. A low level of ripple torques must also be ensured in faulty operations. To fullfill these constraints, the machine is equipped with a fractional-slot concentrated winding made up of four 3-phase windings each one being star-connected, each star being magnetically shifted by an angle of 15 degrees. This 4-star 3-phase configuration allows to reduce the cogging torque and to separate magnetically and physically the phase windings. The end-turns are also drastically reduced, which improves the compactness and the efficiency of the machine. This original multi-phase machine is supplied by four 3-phase PWM voltage source inverter with sinusoidal current law. The magnetic independences between the four star windings allow a very simple control of the four-star supply and a straightforward fault operating mode. Moreover, this 4-star winding configuration yields to very low torque ripples in nominal configuration (four stars connected) and in faulty operations if two magnetic non adjacent stars are disconnected. For all these reasons, this structure appears particularly suitable for naval propulsion application since it increases the machine performances in terms of compactness, reliability and quality of torque.Inversion-based control of electromechanical systems using causal graphical descriptions
http://hdl.handle.net/10985/9276
Inversion-based control of electromechanical systems using causal graphical descriptions
BARRE, Pierre-Jean; BOUSCAYROL, Alain; DELARUE, Philippe; DUMETZ, Eric; GIRAUD, Frédéric; HAUTIER, Jean-Paul; KESTELYN, Xavier; LEMAIRE-SEMAIL, Betty; SEMAIL, Eric
Causal Ordering Graph and Energetic Macroscopic Representation are graphical descriptions to model electromechanical systems using integral causality. Inversion rules have been defined in order to deduce control structure step-bystep from these graphical descriptions. These two modeling tools can be used together to develop a two-layer control of system with complex parts. A double-drive paper system is taken as an example. The deduced control yields good performances of tension regulation and velocity tracking.
Sun, 01 Jan 2006 00:00:00 GMThttp://hdl.handle.net/10985/92762006-01-01T00:00:00ZBARRE, Pierre-JeanBOUSCAYROL, AlainDELARUE, PhilippeDUMETZ, EricGIRAUD, FrédéricHAUTIER, Jean-PaulKESTELYN, XavierLEMAIRE-SEMAIL, BettySEMAIL, EricCausal Ordering Graph and Energetic Macroscopic Representation are graphical descriptions to model electromechanical systems using integral causality. Inversion rules have been defined in order to deduce control structure step-bystep from these graphical descriptions. These two modeling tools can be used together to develop a two-layer control of system with complex parts. A double-drive paper system is taken as an example. The deduced control yields good performances of tension regulation and velocity tracking.Right Harmonic Spectrum for the back-electromotive force of a n-phase synchronous motor
http://hdl.handle.net/10985/9274
Right Harmonic Spectrum for the back-electromotive force of a n-phase synchronous motor
SEMAIL, Eric; KESTELYN, Xavier; BOUSCAYROL, Alain
This paper deals with a vector control of n-phase permanent magnet synchronous machine. To use control algorithms already developed for sine-wave 3-phase machines, the spectrum of back electromotive force (EMF) must contain only odd 2k+1 harmonics which verify the following inequality, 1≤ 2k +1< n . In an experimental vector control of a 5-phase drive, two usual algorithms of sine-wave 3-phase machine are thus used to supply a machine with trapezoidal waveform back EMF. In this case, the first and third harmonics are used to produce torque: the other harmonics, and particularly the 7th one, induce effects as torque ripples and parasitic currents.
Thu, 01 Jan 2004 00:00:00 GMThttp://hdl.handle.net/10985/92742004-01-01T00:00:00ZSEMAIL, EricKESTELYN, XavierBOUSCAYROL, AlainThis paper deals with a vector control of n-phase permanent magnet synchronous machine. To use control algorithms already developed for sine-wave 3-phase machines, the spectrum of back electromotive force (EMF) must contain only odd 2k+1 harmonics which verify the following inequality, 1≤ 2k +1< n . In an experimental vector control of a 5-phase drive, two usual algorithms of sine-wave 3-phase machine are thus used to supply a machine with trapezoidal waveform back EMF. In this case, the first and third harmonics are used to produce torque: the other harmonics, and particularly the 7th one, induce effects as torque ripples and parasitic currents.Investigations on the performances of the electrical generator of a rim-driven marine current turbine”
http://hdl.handle.net/10985/9257
Investigations on the performances of the electrical generator of a rim-driven marine current turbine”
DROUEN, Laurent; CHARPENTIER, Jean-Frederic; SEMAIL, Eric; CLENET, Stéphane
In this paper, the electrical generator of a rim-driven horizontal-axis current turbine is modeled in detail. Its main characteristics and performances are evaluated (efficiency, mass, cost, etc). This generator is of permanent magnet direct-driven synchronous type and is connected to a variable speed power electronics drive. It is then compared to a more traditional technology (a pod generator) in terms of mass and cost for a common set of specification. In addition, due to the specific geometry of the machine, the use of low-cost ferrite magnets is investigated in place of NdFeB magnets.
Tue, 01 Jan 2008 00:00:00 GMThttp://hdl.handle.net/10985/92572008-01-01T00:00:00ZDROUEN, LaurentCHARPENTIER, Jean-FredericSEMAIL, EricCLENET, StéphaneIn this paper, the electrical generator of a rim-driven horizontal-axis current turbine is modeled in detail. Its main characteristics and performances are evaluated (efficiency, mass, cost, etc). This generator is of permanent magnet direct-driven synchronous type and is connected to a variable speed power electronics drive. It is then compared to a more traditional technology (a pod generator) in terms of mass and cost for a common set of specification. In addition, due to the specific geometry of the machine, the use of low-cost ferrite magnets is investigated in place of NdFeB magnets.Fault-Tolerant Operation of an Open-End Winding Five-Phase PMSM Drive with Inverter Faults
http://hdl.handle.net/10985/7421
Fault-Tolerant Operation of an Open-End Winding Five-Phase PMSM Drive with Inverter Faults
MEINGUET, Fabien; NGUYEN, Ngac Ky; SANDULESCU, Paul; KESTELYN, Xavier; SEMAIL, Eric
Multi-phase machines are known for their fault-tolerant capability. However, star-connected machines have no fault tolerance to inverter switch short-circuit fault. This paper investigates the fault-tolerant operation of an open-end five-phase drive, i.e. a multi-phase machine fed with a dual-inverter supply. Open-circuit faults and inverter switch short-circuit faults are considered and handled with various degrees of reconfiguration. Theoretical developments and experimental results validate the proposed strategies.
The authors would like to thank the ADEME for the funding of the MHYGALE project.
Tue, 01 Jan 2013 00:00:00 GMThttp://hdl.handle.net/10985/74212013-01-01T00:00:00ZMEINGUET, FabienNGUYEN, Ngac KySANDULESCU, PaulKESTELYN, XavierSEMAIL, EricMulti-phase machines are known for their fault-tolerant capability. However, star-connected machines have no fault tolerance to inverter switch short-circuit fault. This paper investigates the fault-tolerant operation of an open-end five-phase drive, i.e. a multi-phase machine fed with a dual-inverter supply. Open-circuit faults and inverter switch short-circuit faults are considered and handled with various degrees of reconfiguration. Theoretical developments and experimental results validate the proposed strategies.HIGH SPEED FUNCTIONALITY OPTIMIZATION OF FIVE-PHASE PM MACHINE USING 3RD HARMONIC CURRENT
http://hdl.handle.net/10985/7355
HIGH SPEED FUNCTIONALITY OPTIMIZATION OF FIVE-PHASE PM MACHINE USING 3RD HARMONIC CURRENT
GONG, Jinlin; ASLAN, Bassel; GILLON, Frédéric; SEMAIL, Eric
Some surrogate-assisted optimization techniques are applied in order to improve the performances of a 5-phase Permanent Magnet (PM) machine in the context of a complex model requiring computation time. An optimal control of four independent currents is proposed in order to minimize the total losses with the respect of functioning constraints. Moreover, some geometrical parameters are added to the optimization process allowing a co-design between control and dimensioning. The effectiveness of the method allows solving the challenge which consists in taking into account inside the control strategy the eddy-current losses in magnets and iron. In fact, magnet losses are a critical point to protect the machine from demagnetization in flux-weakening region. But these losses, which highly depend on magnetic state of the machine, must be calculated by Finite Element Method (FEM) to be accurate. The FEM has the drawback to be time consuming. It is why, a direct optimization using FEM is critical. The response surface method (RSM) and the Efficient Global Optimization (EGO) algorithm consist in approximating the FEM by a surrogate model used directly or indirectly in the optimization process. The optimal results proved the interest of the both methods in this context
This project was supported by the Laboratory of Electrical Engineering and Power Electronics (L2EP) France. It is a successive cooperation project between the control team and optimization team of the laboratory .
Wed, 01 Jan 2014 00:00:00 GMThttp://hdl.handle.net/10985/73552014-01-01T00:00:00ZGONG, JinlinASLAN, BasselGILLON, FrédéricSEMAIL, EricSome surrogate-assisted optimization techniques are applied in order to improve the performances of a 5-phase Permanent Magnet (PM) machine in the context of a complex model requiring computation time. An optimal control of four independent currents is proposed in order to minimize the total losses with the respect of functioning constraints. Moreover, some geometrical parameters are added to the optimization process allowing a co-design between control and dimensioning. The effectiveness of the method allows solving the challenge which consists in taking into account inside the control strategy the eddy-current losses in magnets and iron. In fact, magnet losses are a critical point to protect the machine from demagnetization in flux-weakening region. But these losses, which highly depend on magnetic state of the machine, must be calculated by Finite Element Method (FEM) to be accurate. The FEM has the drawback to be time consuming. It is why, a direct optimization using FEM is critical. The response surface method (RSM) and the Efficient Global Optimization (EGO) algorithm consist in approximating the FEM by a surrogate model used directly or indirectly in the optimization process. The optimal results proved the interest of the both methods in this context