SAM
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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.High Order Sliding mode optimal current control of Five Phase Permanent magnet Motor under Open Circuited phase Fault Conditions
http://hdl.handle.net/10985/8822
High Order Sliding mode optimal current control of Five Phase Permanent magnet Motor under Open Circuited phase Fault Conditions
MEKRI, Fatiha; CHARPENTIER, Jean-Frederic; BENELGHALI, Seifeddine; KESTELYN, Xavier
Electrical marine propulsion systems are characterized by very high level requirements in terms of compactness, acoustic behavior and reliability. In this particular context, the use of multiphase PM machines associated with VSI drives appears to be a very efficient solution. Presented work focus on the use of such a system in open circuited phase fault conditions. With this kind of system it is possible to determine optimal current references which maximize the torque density of the system when one or two phases are open circuited. Classical linear controllers (as PID for example) cannot provide a correct tracking of these optimal current references because they have a highly dynamical behavior. We propose in this paper to combine this optimal current reference generation with High Order Sliding Mode (HOSM) control. This kind of solution allows a good tracking of these unconventional current references with a fixed switching frequency for the VSI. This method is validated experimentally using a low power experimental set-up which associates a 5-phase PM machine with a DSP controlled IGBT 5-leg VSI drive.
Fri, 01 Jan 2010 00:00:00 GMThttp://hdl.handle.net/10985/88222010-01-01T00:00:00ZMEKRI, FatihaCHARPENTIER, Jean-FredericBENELGHALI, SeifeddineKESTELYN, XavierElectrical marine propulsion systems are characterized by very high level requirements in terms of compactness, acoustic behavior and reliability. In this particular context, the use of multiphase PM machines associated with VSI drives appears to be a very efficient solution. Presented work focus on the use of such a system in open circuited phase fault conditions. With this kind of system it is possible to determine optimal current references which maximize the torque density of the system when one or two phases are open circuited. Classical linear controllers (as PID for example) cannot provide a correct tracking of these optimal current references because they have a highly dynamical behavior. We propose in this paper to combine this optimal current reference generation with High Order Sliding Mode (HOSM) control. This kind of solution allows a good tracking of these unconventional current references with a fixed switching frequency for the VSI. This method is validated experimentally using a low power experimental set-up which associates a 5-phase PM machine with a DSP controlled IGBT 5-leg VSI drive.Sensitivity of a 5-phase Brushless DC machine to the 7th harmonic of the back-electromotive force
http://hdl.handle.net/10985/10781
Sensitivity of a 5-phase Brushless DC machine to the 7th harmonic of the back-electromotive force
SEMAIL, Eric; KESTELYN, Xavier; BOUSCAYROL, Alain
This paper presents a vector control of a 5-phase drive composed of a 5-leg Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) supplying a permanent-magnet Brushless DC (BLDC) machine with trapezoidal waveform of the back-electromotive force (EMF). To achieve this control a Multi-machine Multi-converter model is used: the 5-phase machine is transformed into a set of two 2-phase fictitious machines which are each one controlled in a (d,q) frame as 3-phase machines with sine waveform back-EMF. In comparison with the 3-phase BLDC drives, the 5-phase ones present one particularity: a high sensitivity to the 7th harmonic of back-EMF. Experimental results show that the 7th harmonic of back-EMF, which represents only 5% of RMS back-EMF, induces high amplitude parasitic currents (29 % percent of RMS current). The model allows to explain the origin of this sensitivity and how to modify simply the control algorithm. Experimental improvements of the drive are presented.
Thu, 01 Jan 2004 00:00:00 GMThttp://hdl.handle.net/10985/107812004-01-01T00:00:00ZSEMAIL, EricKESTELYN, XavierBOUSCAYROL, AlainThis paper presents a vector control of a 5-phase drive composed of a 5-leg Pulse Width Modulation (PWM) Voltage Source Inverter (VSI) supplying a permanent-magnet Brushless DC (BLDC) machine with trapezoidal waveform of the back-electromotive force (EMF). To achieve this control a Multi-machine Multi-converter model is used: the 5-phase machine is transformed into a set of two 2-phase fictitious machines which are each one controlled in a (d,q) frame as 3-phase machines with sine waveform back-EMF. In comparison with the 3-phase BLDC drives, the 5-phase ones present one particularity: a high sensitivity to the 7th harmonic of back-EMF. Experimental results show that the 7th harmonic of back-EMF, which represents only 5% of RMS back-EMF, induces high amplitude parasitic currents (29 % percent of RMS current). The model allows to explain the origin of this sensitivity and how to modify simply the control algorithm. Experimental improvements of the drive are presented.Analytical Optimal Currents for Multiphase PMSMs Under Fault Conditions and Saturation
http://hdl.handle.net/10985/8410
Analytical Optimal Currents for Multiphase PMSMs Under Fault Conditions and Saturation
NGUYEN, Ngac Ky; FLIELLER, Damien; KESTELYN, Xavier; SEMAIL, Eric
An original analytical expression is presented in this paper to obtain optimal currents minimizing the copper losses of a multi-phase Permanent Magnet Synchronous Motor (PMSM) under fault conditions. Based on the existing solutions [i]opt1 (without zero sequence of current constraint) and [i]opt2 (with zero sequence constraint), this new expression of currents [i]opt3 is obtained by means of a geometrical representation and can be applied to open-circuit, defect of current regulation, current saturation and machine phase short-circuit fault. Simulation results are presented to validate the proposed approach.
Wed, 01 Jan 2014 00:00:00 GMThttp://hdl.handle.net/10985/84102014-01-01T00:00:00ZNGUYEN, Ngac KyFLIELLER, DamienKESTELYN, XavierSEMAIL, EricAn original analytical expression is presented in this paper to obtain optimal currents minimizing the copper losses of a multi-phase Permanent Magnet Synchronous Motor (PMSM) under fault conditions. Based on the existing solutions [i]opt1 (without zero sequence of current constraint) and [i]opt2 (with zero sequence constraint), this new expression of currents [i]opt3 is obtained by means of a geometrical representation and can be applied to open-circuit, defect of current regulation, current saturation and machine phase short-circuit fault. Simulation results are presented to validate the proposed approach.Computation of Optimal Current References for Flux-weakening of Multi-Phase Synchronous Machines
http://hdl.handle.net/10985/6741
Computation of Optimal Current References for Flux-weakening of Multi-Phase Synchronous Machines
LU, Li; ASLAN, Bassel; KOBYLANSKI, Luc; SANDULESCU, Paul; MEINGUET, Fabien; KESTELYN, Xavier; SEMAIL, Eric
Multi-phase synchronous machines are more and more used in specific applications where high power density, low bus voltage, wide speed range and fault-tolerant capabilities are required. Due to the high number of degrees of freedom, multi-phase machines are difficult to optimally operate in flux-weakening zones. This paper proposes a technique to numerically compute optimal current references that can be used for feed-forward flux-weakening techniques in order to exploit the maximum machine performances for given DC bus voltage and current limits. The proposed technique is applied to a five-phase permanent magnet synchronous machine specifically developed for an automotive application.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10985/67412012-01-01T00:00:00ZLU, LiASLAN, BasselKOBYLANSKI, LucSANDULESCU, PaulMEINGUET, FabienKESTELYN, XavierSEMAIL, EricMulti-phase synchronous machines are more and more used in specific applications where high power density, low bus voltage, wide speed range and fault-tolerant capabilities are required. Due to the high number of degrees of freedom, multi-phase machines are difficult to optimally operate in flux-weakening zones. This paper proposes a technique to numerically compute optimal current references that can be used for feed-forward flux-weakening techniques in order to exploit the maximum machine performances for given DC bus voltage and current limits. The proposed technique is applied to a five-phase permanent magnet synchronous machine specifically developed for an automotive application.Modélisation vectorielle et commande de machines polyphasées à pôles lisses alimentées par onduleur de tension
http://hdl.handle.net/10985/6896
Modélisation vectorielle et commande de machines polyphasées à pôles lisses alimentées par onduleur de tension
SEMAIL, Eric; KESTELYN, Xavier
Ce chapitre traite de la modélisation et de la commande de machines électriques à plus de deux courants indépendants alimentées par onduleur de tension. Une approche vectorielle générale permettant de généraliser le concept de machine diphasée équivalente utilisé pour les machines triphasées est présentée et appliquée au cas d’une machine synchrone prototype à aimants permanents cinq phases alimentée soit par 5 bras d’onduleurs.
Fri, 01 Jan 2010 00:00:00 GMThttp://hdl.handle.net/10985/68962010-01-01T00:00:00ZSEMAIL, EricKESTELYN, XavierCe chapitre traite de la modélisation et de la commande de machines électriques à plus de deux courants indépendants alimentées par onduleur de tension. Une approche vectorielle générale permettant de généraliser le concept de machine diphasée équivalente utilisé pour les machines triphasées est présentée et appliquée au cas d’une machine synchrone prototype à aimants permanents cinq phases alimentée soit par 5 bras d’onduleurs.Control of Non-conventional Synchronous Motors
http://hdl.handle.net/10985/6897
Control of Non-conventional Synchronous Motors
SEMAIL, Eric; KESTELYN, Xavier
This chapter is devoted to the modeling and control of electrical machines having at least two independent statoric currents. The star-coupled three-phase machine without a neutral terminal or the triangle-coupled three-phase machine is the most basic of them. More precisely, the aim of this chapter is to emphasize the particularities created by a number of independent currents greater than two with respect to the classical three-phase machine.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10985/68972012-01-01T00:00:00ZSEMAIL, EricKESTELYN, XavierThis chapter is devoted to the modeling and control of electrical machines having at least two independent statoric currents. The star-coupled three-phase machine without a neutral terminal or the triangle-coupled three-phase machine is the most basic of them. More precisely, the aim of this chapter is to emphasize the particularities created by a number of independent currents greater than two with respect to the classical three-phase machine.Flux-weakening operation of open-end winding drive integrating a cost effective high-power charger
http://hdl.handle.net/10985/6794
Flux-weakening operation of open-end winding drive integrating a cost effective high-power charger
SANDULESCU, Paul; MEINGUET, Fabien; KESTELYN, Xavier; SEMAIL, Eric; BRUYERE, Antoine
In this paper, a three-phase drive with a six-leg Voltage Source Inverter (VSI) and an open-end winding Interior Permanent Magnet Synchronous Machine (IPMSM) designed for the traction of an electric vehicle is studied in flux-weakening operation. The topology allows the functionality of a high power charger to be obtained, without adding any other supplementary power devices. On the other hand, since there are three independent currents, the control structure has to handle not only the two dq current components but also a zero-sequence current. If neglected, in comparison with wye-coupled three-phase drive, this zero-sequence component can cause a higher maximum peak value of the phase currents, additional stator Joule losses, torque ripple, inverter voltage saturation and IGBT oversizing. The proposed control strategy consists in adapting a conventional method used for wye-connected machines particularly in flux-weakening operation. This strategy allows the closed-loop control of the zero-sequence current to be maintained in the whole speed range and therefore inverter saturation is avoided. Simulations and experimental results are presented and analyzed.
Tue, 01 Jan 2013 00:00:00 GMThttp://hdl.handle.net/10985/67942013-01-01T00:00:00ZSANDULESCU, PaulMEINGUET, FabienKESTELYN, XavierSEMAIL, EricBRUYERE, AntoineIn this paper, a three-phase drive with a six-leg Voltage Source Inverter (VSI) and an open-end winding Interior Permanent Magnet Synchronous Machine (IPMSM) designed for the traction of an electric vehicle is studied in flux-weakening operation. The topology allows the functionality of a high power charger to be obtained, without adding any other supplementary power devices. On the other hand, since there are three independent currents, the control structure has to handle not only the two dq current components but also a zero-sequence current. If neglected, in comparison with wye-coupled three-phase drive, this zero-sequence component can cause a higher maximum peak value of the phase currents, additional stator Joule losses, torque ripple, inverter voltage saturation and IGBT oversizing. The proposed control strategy consists in adapting a conventional method used for wye-connected machines particularly in flux-weakening operation. This strategy allows the closed-loop control of the zero-sequence current to be maintained in the whole speed range and therefore inverter saturation is avoided. Simulations and experimental results are presented and analyzed.A Multiphase Traction/Fast-Battery-Charger Drive for Electric or Plug-in Hybrid Vehicles
http://hdl.handle.net/10985/6750
A Multiphase Traction/Fast-Battery-Charger Drive for Electric or Plug-in Hybrid Vehicles
SANDULESCU, Paul; KESTELYN, Xavier; SEMAIL, Eric; BRUYERE, Antoine; BOUCHEZ, Boris; DE SOUSA, Luis
For Electric Vehicles (EV), the charger is one of the main technical and economical weaknesses. This paper focuses on an original electric drive [1]-[3] dedicated to the vehicle traction and configurable as a battery charger without need of additional components. This cheap solution can outfit either electric or plug-in hybrid automotive vehicles, without needing additional mass and volume dedicated to the charger. Moreover, it allows a high charging power, for short duration charge cycles. However, this solution needs specific cares concerning the electrical machine control. This paper deals with the control of this drive [1], focusing on traction mode. In introduction, a review is done about topologies of combined on-board chargers. Then, the studied topology is introduced; using a 3-phase brushless machine supplied with a 6-leg Voltage Source Inverter (VSI). A model for its control is defined in the generalized Concordia frame, considering the traction mode. Then, an analysis of this model is established using a multimachine theory and a graphical formalism (the Energetic Macroscopic Representation denoted EMR). Using EMR, a description of energy flows shows specific control constraints. Indeed, numerical simulations illustrate the perturbations on the currents and the torque when controlling the machine with standard control methodologies. An improved control, deduced from the previous analysis, shows good performances, strongly reducing currents and torque ripples.
Fri, 01 Jan 2010 00:00:00 GMThttp://hdl.handle.net/10985/67502010-01-01T00:00:00ZSANDULESCU, PaulKESTELYN, XavierSEMAIL, EricBRUYERE, AntoineBOUCHEZ, BorisDE SOUSA, LuisFor Electric Vehicles (EV), the charger is one of the main technical and economical weaknesses. This paper focuses on an original electric drive [1]-[3] dedicated to the vehicle traction and configurable as a battery charger without need of additional components. This cheap solution can outfit either electric or plug-in hybrid automotive vehicles, without needing additional mass and volume dedicated to the charger. Moreover, it allows a high charging power, for short duration charge cycles. However, this solution needs specific cares concerning the electrical machine control. This paper deals with the control of this drive [1], focusing on traction mode. In introduction, a review is done about topologies of combined on-board chargers. Then, the studied topology is introduced; using a 3-phase brushless machine supplied with a 6-leg Voltage Source Inverter (VSI). A model for its control is defined in the generalized Concordia frame, considering the traction mode. Then, an analysis of this model is established using a multimachine theory and a graphical formalism (the Energetic Macroscopic Representation denoted EMR). Using EMR, a description of energy flows shows specific control constraints. Indeed, numerical simulations illustrate the perturbations on the currents and the torque when controlling the machine with standard control methodologies. An improved control, deduced from the previous analysis, shows good performances, strongly reducing currents and torque ripples.FPGA Implementation of a General Space Vector Approach on a 6-Leg Voltage Source Inverter
http://hdl.handle.net/10985/6749
FPGA Implementation of a General Space Vector Approach on a 6-Leg Voltage Source Inverter
SANDULESCU, Paul; IDKHAJINE, Lahoucine; CENSE, Sébastien; COLAS, Frédéric; KESTELYN, Xavier; SEMAIL, Eric; BRUYERE, Antoine
A general algorithm of a Space Vector approach is implemented on a 6-leg VSI controlling a PM synchronous machine with three independent phases. In this last case, the necessity of controlling the zero-sequence current motivates the choice of a special family of vectors, different of this one used in Pulse Width Modulation (PWM) intersective strategy and in common Space Vector PWM (SVPWM). To preserve the parallelism of the algorithm and fulfill the execution time constraints, the implementation is made on a Field Programmable Gate Array (FPGA). Comparisons with more classical 2-level and 3-level PWM are provided.
Sat, 01 Jan 2011 00:00:00 GMThttp://hdl.handle.net/10985/67492011-01-01T00:00:00ZSANDULESCU, PaulIDKHAJINE, LahoucineCENSE, SébastienCOLAS, FrédéricKESTELYN, XavierSEMAIL, EricBRUYERE, AntoineA general algorithm of a Space Vector approach is implemented on a 6-leg VSI controlling a PM synchronous machine with three independent phases. In this last case, the necessity of controlling the zero-sequence current motivates the choice of a special family of vectors, different of this one used in Pulse Width Modulation (PWM) intersective strategy and in common Space Vector PWM (SVPWM). To preserve the parallelism of the algorithm and fulfill the execution time constraints, the implementation is made on a Field Programmable Gate Array (FPGA). Comparisons with more classical 2-level and 3-level PWM are provided.