https://sam.ensam.eu:443 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Thu, 12 Mar 2026 14:03:37 GMT 2026-03-12T14:03:37Z http://hdl.handle.net/10985/9261 Predetermination of Currents and Field in Short-Circuit Voltage Operation for an Axial-Flux Permanent Magnet Machine HENNERON, Thomas; LOCMENT, Fabrice; PIRIOU, Francis; SEMAIL, Eric Risk of irreversible magnet demagnetization during short-circuit fault is analyzed in case of an axial-flux dual-rotor machine, using a three-dimensional finite-element method (3D-FEM). In order to validate the numerical model, calculated waveforms of the currents are compared with experimental results for short-circuit at low speeds. Then currents and magnetic flux density inside the magnets are computed for short-circuit at higher speeds in order to predetermine the maximum admissible speed for the machine. Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10985/9261 2008-01-01T00:00:00Z HENNERON, Thomas LOCMENT, Fabrice PIRIOU, Francis SEMAIL, Eric Risk of irreversible magnet demagnetization during short-circuit fault is analyzed in case of an axial-flux dual-rotor machine, using a three-dimensional finite-element method (3D-FEM). In order to validate the numerical model, calculated waveforms of the currents are compared with experimental results for short-circuit at low speeds. Then currents and magnetic flux density inside the magnets are computed for short-circuit at higher speeds in order to predetermine the maximum admissible speed for the machine. http://hdl.handle.net/10985/9263 Modeling and Control of a 7-phase Claw-pole Starter-alternator for a Micro-hybrid Automotive Application BRUYERE, Antoine; BOUSCAYROL, Alain; CHARLEY, Jacques; LOCMENT, Fabrice; DUBUS, Jean-Marc; MIPO, Jean-Claude; SEMAIL, Eric This paper deals with the modeling and the control of a new high power 12V Integrated Starter Alternator (ISA). This system is used to bring micro-hybrid functions to standard Internal Combustion Engine (ICE) vehicles. The drive is composed of a seven-phase synchronous claw-pole machine with separate excitation, supplied with a seven-leg Voltage Source Inverter (VSI) designed for low voltage and high current. The system is modeled in a generalized Concordia frame and a graphical description is used to highlight energetic properties of such a complex system. A control scheme is then deduced from this graphical description. Two controls are achieved in generator mode and compared: one is using the VSI in a square-wave mode, the other in a Pulse Width Modulation (PWM) mode. Experimental results are provided. Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10985/9263 2008-01-01T00:00:00Z BRUYERE, Antoine BOUSCAYROL, Alain CHARLEY, Jacques LOCMENT, Fabrice DUBUS, Jean-Marc MIPO, Jean-Claude SEMAIL, Eric This paper deals with the modeling and the control of a new high power 12V Integrated Starter Alternator (ISA). This system is used to bring micro-hybrid functions to standard Internal Combustion Engine (ICE) vehicles. The drive is composed of a seven-phase synchronous claw-pole machine with separate excitation, supplied with a seven-leg Voltage Source Inverter (VSI) designed for low voltage and high current. The system is modeled in a generalized Concordia frame and a graphical description is used to highlight energetic properties of such a complex system. A control scheme is then deduced from this graphical description. Two controls are achieved in generator mode and compared: one is using the VSI in a square-wave mode, the other in a Pulse Width Modulation (PWM) mode. Experimental results are provided. http://hdl.handle.net/10985/9255 Identification of a 7-phase claw-pole starter-alternator for a micro-hybrid automotive application BRUYERE, Antoine; HENNERON, Thomas; SEMAIL, Eric; LOCMENT, Fabrice; BOUSCAYROL, Alain; DUBUS, Jean-Marc; MIPO, Jean-Claude This paper deals with the identification of a new high power starter-alternator system, using both: a Finite Element Method (FEM) modeling and an experimental vector control. The drive is composed of a synchronous 7-phase claw-pole machine supplied with a low voltage / high current Voltage Source Inverter (VSI). This structure needs specific approaches to plan its electrical and mechanical behaviors and to identify the parameters needed for control purpose. At first, a Finite Element Method (FEM) modeling of the machine is presented. It is used for the predetermination of the electromotive forces and of the torque. Experimental results are in good accordance with numerical results. In a second part, resistive and inductive parameters of the drive are determined by an original experimental approach that takes into account each component of the drive: the battery, the VSI and the machine. Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10985/9255 2008-01-01T00:00:00Z BRUYERE, Antoine HENNERON, Thomas SEMAIL, Eric LOCMENT, Fabrice BOUSCAYROL, Alain DUBUS, Jean-Marc MIPO, Jean-Claude This paper deals with the identification of a new high power starter-alternator system, using both: a Finite Element Method (FEM) modeling and an experimental vector control. The drive is composed of a synchronous 7-phase claw-pole machine supplied with a low voltage / high current Voltage Source Inverter (VSI). This structure needs specific approaches to plan its electrical and mechanical behaviors and to identify the parameters needed for control purpose. At first, a Finite Element Method (FEM) modeling of the machine is presented. It is used for the predetermination of the electromotive forces and of the torque. Experimental results are in good accordance with numerical results. In a second part, resistive and inductive parameters of the drive are determined by an original experimental approach that takes into account each component of the drive: the battery, the VSI and the machine. http://hdl.handle.net/10985/7424 Design and Study of a Multi-phase Axial-flux machine LOCMENT, Fabrice; PIRIOU, Francis; SEMAIL, Eric In this paper, a 7-phase Axial-flux Double-rotor Permanent Magnet Synchronous Machine is studied using analytical and Finite Element methods. This type of machine shows a higher sensitivity to the inductance harmonics and electromotive force (emf) compared with the 3-phase machines. So, the conventional analytical modeling method, in which only the first harmonic is taken into account, leads to significant errors in the determination of the control parameters, e.g. the frequency of Pulse Width Modulation Voltage Source Inverter. A multi-machine model explains the reasons for this sensitivity and a more sophisticated analytical method is used. Results are compared with those obtained by the 3-D FEM Adresse URL de l'éditeur http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1608484&isnumber=33780 Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Sun, 01 Jan 2006 00:00:00 GMT http://hdl.handle.net/10985/7424 2006-01-01T00:00:00Z LOCMENT, Fabrice PIRIOU, Francis SEMAIL, Eric In this paper, a 7-phase Axial-flux Double-rotor Permanent Magnet Synchronous Machine is studied using analytical and Finite Element methods. This type of machine shows a higher sensitivity to the inductance harmonics and electromotive force (emf) compared with the 3-phase machines. So, the conventional analytical modeling method, in which only the first harmonic is taken into account, leads to significant errors in the determination of the control parameters, e.g. the frequency of Pulse Width Modulation Voltage Source Inverter. A multi-machine model explains the reasons for this sensitivity and a more sophisticated analytical method is used. Results are compared with those obtained by the 3-D FEM http://hdl.handle.net/10985/6976 Fault Tolerant Multiphase Electrical Drives: The Impact of Design LOCMENT, Fabrice; SEMAIL, Eric; KESTELYN, Xavier This paper deals with fault tolerant multiphase electrical drives. The quality of the torque of a vector-controlled Permanent Magnet (PM) Synchronous Machine supplied by a multi-leg Voltage Source Inverter (VSI) is examined in normal operation and when one or two phases are open-circuited. It is then deduced that a seven-phase machine is a good compromise allowing high torque-to-volume density and easy control with smooth torque in fault operation. Experimental results confirm the predicted characteristics. La version editeur de cet article est disponible à l'adresse suivante : http://journals.cambridge.org/action//displayFulltext?type=1&fid=8024174&jid=JAP&volumeId=43&issueId=02&aid=8024172&bodyId=&membershipNumber=&societyETOCSession= Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10985/6976 2008-01-01T00:00:00Z LOCMENT, Fabrice SEMAIL, Eric KESTELYN, Xavier This paper deals with fault tolerant multiphase electrical drives. The quality of the torque of a vector-controlled Permanent Magnet (PM) Synchronous Machine supplied by a multi-leg Voltage Source Inverter (VSI) is examined in normal operation and when one or two phases are open-circuited. It is then deduced that a seven-phase machine is a good compromise allowing high torque-to-volume density and easy control with smooth torque in fault operation. Experimental results confirm the predicted characteristics. http://hdl.handle.net/10985/6956 Vectorial Approach Based Control of a Seven-Phase Axial Flux Machine Designed for Fault Operation LOCMENT, Fabrice; SEMAIL, Eric; KESTELYN, Xavier This paper deals with easy-to-implement control strategies when a seven-phase axial flux permanent magnet machine supplied by a seven-leg voltage source inverter is in fault operation mode. Using a vectorial multimachine description, a seven-phase machine presenting a heightened ability to be controlled with one or two open-circuited phases has been designed. The machine is first presented, and experimental results are provided when one or two phases are open circuited. Based on a vectorial approach, new current references are calculated to avoid high-torque ripples. Version éditeur disponible à l'adresse suivante : http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4519973&isnumber=4636792 Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10985/6956 2008-01-01T00:00:00Z LOCMENT, Fabrice SEMAIL, Eric KESTELYN, Xavier This paper deals with easy-to-implement control strategies when a seven-phase axial flux permanent magnet machine supplied by a seven-leg voltage source inverter is in fault operation mode. Using a vectorial multimachine description, a seven-phase machine presenting a heightened ability to be controlled with one or two open-circuited phases has been designed. The machine is first presented, and experimental results are provided when one or two phases are open circuited. Based on a vectorial approach, new current references are calculated to avoid high-torque ripples.