Cristian De Angelo | Universidad Nacional de Rio Cuarto (original) (raw)
Papers by Cristian De Angelo
IEEE Transactions on Industrial Electronics, 2006
A new sensorless scheme for high-performance speed control of permanent-magnet ac motors (PMACMs)... more A new sensorless scheme for high-performance speed control of permanent-magnet ac motors (PMACMs) driving an unknown load is proposed. This scheme uses an extended nonlinear reduced-order observer to estimate the induced electromotive force (EMF) and load torque. From the estimated variables, the rotor position, the rotor speed, and the position derivative of flux are calculated and are used to close the control loop. In order to improve the drive performance, the estimated load torque is incorporated as a feedforward signal in the closed control loop. In addition, the proposed sensorless PMACM drive allows the torque-ripple and copper-loss minimization for motors with an arbitrary EMF waveform. Simulation and experimental results to validate the proposal are presented in this paper.
Energy Conversion and Management, 2011
This paper aims to complement studies concerning the influence of voltage unbalance on the perfor... more This paper aims to complement studies concerning the influence of voltage unbalance on the performance of induction motors. We use sequence equivalent circuits to determine the increase of losses in the induction motor. We take into account the dependence of the rotor negative-sequence reactance with the load state and the increase in rotor resistance with the negative-sequence currents. Variations in the negative-sequence impedance are related with the structural characteristics of the rotor. We analyze motors with open and closed rotor slots, because the impedance of rotors with closed slots grows considerably when the load is less than rated, producing lower negative-sequence currents and lower losses. Increased rotor impedance in closed slot motors protects these motors against problems due to unbalanced supply voltage. For both type of rotors, we analyze motor derating factor based on voltage unbalance and increases in total losses and rotor losses.► We study the increase of losses in the induction motor (IM) with voltage unbalance. ► We take into account the variations in the negative-sequence impedance of the rotor. ► We analyze the performance in IM with open and closed rotor slots. ► For both type of rotors, we get the derating factor for different levels of unbalance. ► IM with closed-slot are less affected by voltage unbalance than open-slot ones.
Effects of rotor faults on stator currents in induction motors are studied in the present work. P... more Effects of rotor faults on stator currents in induction motors are studied in the present work. Particularly, the effects of such faults on the sidebands at fundamental and harmonics current components are analyzed. A multiple-coupled circuit model determines the variation of amplitude of these sidebands as a function of the number of broken bars, load and motor-load inertia. The results obtained from this analysis allow improving the rotor fault diagnosis techniques and identifying and separating rotor faults from others. Simulation and experimental results are presented to validate the proposal.
1, 2, 4 Grupo de Electrónica Aplicada, Universidad Nacional de Río Cuarto Ruta Nacional #36, Km. ... more 1, 2, 4 Grupo de Electrónica Aplicada, Universidad Nacional de Río Cuarto Ruta Nacional #36, Km. 601, (5800) Río Cuarto, Córdoba, Argentina Tel.: +54-358-4676255; Fax: +54-358-4676246 gbossio@ing.unrc.edu.ar; cdeangelo@ieee.org; g.garcia@ieee.org
IEEE Transactions on Energy Conversion, 2004
IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 19, NO. 1, MARCH 2004 ... A 2-D Model of the Inducti... more IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 19, NO. 1, MARCH 2004 ... A 2-D Model of the Induction Machine: An Extension ... Guillermo Bossio, Cristian De Angelo, Student Member, IEEE, Jorge Solsona, Member, IEEE, Guillermo García, Senior Member, IEEE, ...
A sensorless strategy for speed control of permanent motors driving an unknown load torque is pre... more A sensorless strategy for speed control of permanent motors driving an unknown load torque is presented. The proposed strategy uses an extended non-linear reduced-order observer that includes information about the waveform of the EMF generated by the motor, which is neither sinusoidal nor trapezoidal. In order to improve the drive performance, the unknown disturbance torque is estimated by means of an adaptive law, and is incorporated as feedforward signal into the control loop. It allows the realization of torque control avoiding position sensor and with minimum torque ripple. Simulation results that validate the proposal are shown.
A method for the analysis of a position estimation strategy for induction motors is presented. A ... more A method for the analysis of a position estimation strategy for induction motors is presented. A model of multiple-coupled circuits, whose parameters are calculated from the winding geometry and distribution, is used for the analysis. The analyzed estimation strategy is based on the variation of the inductance between stator windings and rotor bars. The rotor position is obtained from the
1,2 y 4 Grupo de Electrónica Aplicada (GEA), Universidad Nacional de Río Cuarto Ruta Nacional #36... more 1,2 y 4 Grupo de Electrónica Aplicada (GEA), Universidad Nacional de Río Cuarto Ruta Nacional #36, Km. 601, (5800) Río Cuarto, Córdoba, Argentina Tel.: +54-358-4676255; Fax: +54-358-4676246 cdeangelo@ieee.org; gbossio@ing.unrc.edu.ar; g.garcia@ieee.org
... [3] Manés F Cabanas, Carlos H. Rojas, Manuel García Maleno, Gonzalo A. Orcajo, Manuel P. Dons... more ... [3] Manés F Cabanas, Carlos H. Rojas, Manuel García Maleno, Gonzalo A. Orcajo, Manuel P. Donsión. ... [4] Obaid, RR; Habetler, TG; Current-based algorithm for mechanical fault detection in induction motors with arbitrary load conditions. In-...
The effect of rotor faults, such as broken bars and end rings, over the signals of a position est... more The effect of rotor faults, such as broken bars and end rings, over the signals of a position estimation strategy for induction motor drives is analyzed using a multiple coupled circuit model. The objective is to establish the possibility of using the estimation strategy signals for fault diagnosis in variable speed electric drives. This strategy is based on the effect produced by inductance variation on the zero sequence voltage, exciting the motor with a predefined inverter-switching pattern. Experimental results illustrate the feasibility of the proposal.
In this work a stator winding turn fault diagnosis strategy in induction motor drives is proposed... more In this work a stator winding turn fault diagnosis strategy in induction motor drives is proposed. The strategy is based on the effect of the inductance variations, produced by the faults, over the cero sequence voltage when the motor is excited with a predefined inverter switching pattern applied by the inverter.
In this work, a method to minimize DC motor drive losses is presented. It is based on a model tha... more In this work, a method to minimize DC motor drive losses is presented. It is based on a model that includes motor and converter losses. The method is theoretically presented and experimental results to validate the theory are shown. A controller for torque and speed is proposed
IEEE Transactions on Industrial Electronics, 2005
A new nonlinear reduced-order observer to estimate the rotor speed and position for permanent-mag... more A new nonlinear reduced-order observer to estimate the rotor speed and position for permanent-magnet motors, with arbitrary electromotive force (EMF) waveform, is presented. The proposed observer is suitable for the realization of a torque control with minimum torque ripple. In order to implement the observer, the EMF generated by the motor is first obtained experimentally offline. After that, it is approximated by a Fourier series in order to develop the model to be used in the online estimation. From the estimated EMF, rotor position and speed are calculated using the relationship between the EMF and the rotor variables. The proposal is validated with experimental results.
IEEE Transactions on Industry Applications, 2005
Page 1. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 41, NO. 4, JULY/AUGUST 2005 1005 Effects... more Page 1. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 41, NO. 4, JULY/AUGUST 2005 1005 Effects of Rotor Bar and End-Ring Faults Over the Signals of a Position Estimation Strategy for Induction Motors Guillermo ...
IEEE Transactions on Industrial Electronics, 2009
A new method for broken rotor bars and load oscillation diagnosis on induction motors is presente... more A new method for broken rotor bars and load oscillation diagnosis on induction motors is presented. The proposed strategy is based on the decomposition of the stator currents into their instantaneous active and reactive current components. Such components allow the decoupling of the effects produced by rotor asymmetries from those produced by oscillating loads. This allows not only the proper fault detection but also a correct fault diagnosis. Simulation and experimental results, both from laboratory and industrial cases, are presented to validate the proposal.
IEEE Transactions on Industrial Electronics, 2009
In this paper, a model-based strategy for statorinterturn short-circuit detection on induction mo... more In this paper, a model-based strategy for statorinterturn short-circuit detection on induction motors is presented. The proposed strategy is based on the generation of a vector of specific residual using a state observer. The vectorial residual is generated from a decomposition of the current estimation error. This allows for a fast detection of incipient faults, independently of the phase in which the fault occurs. Since the observer includes an adaptive scheme for rotor-speed estimation, the proposed scheme can be implemented for online monitoring, by measuring only stator voltages and currents. It is shown that the proposed strategy presents very low sensitivity to load variations and power-supply perturbations. Experimental results are included to show the ability of the proposed strategy for detecting incipient faults, including a low number of short-circuited turns and low fault current.
Resumen: Se presenta el análisis y diseño de un convertidor reductor-elevador bidireccional, incl... more Resumen: Se presenta el análisis y diseño de un convertidor reductor-elevador bidireccional, incluyendo su control. El convertidor fue diseñado para ser usado en un accionamiento con un motor de imanes permanentes de flujo axial para vehículos eléctricos. El objetivo de este convertidor es controlar el flujo de energía desde y hacia un banco de baterías, regulando la tensión de alimentación
IEEE Transactions on Energy Conversion, 2006
AbstractIn this paper, the application of an additional excita-tion in induction motor (IM) driv... more AbstractIn this paper, the application of an additional excita-tion in induction motor (IM) drives for static, dynamic, and mixed eccentricity diagnosis is proposed. The additional excitation con-sists in a predefined inverter-switching pattern that is applied on the motor for a short ...
Resumen En los últimos años algunos investigadores han propuesto e implementado variadas altern... more Resumen En los últimos años algunos investigadores han propuesto e implementado variadas alternativas para la detección y diagnóstico de fallas en maquinas de inducción. Algunas metodologías se caracterizan por su carácter no invasivo ya que no se montan sensores sobre el ...
IEEE Transactions on Industrial Electronics, 2006
A new sensorless scheme for high-performance speed control of permanent-magnet ac motors (PMACMs)... more A new sensorless scheme for high-performance speed control of permanent-magnet ac motors (PMACMs) driving an unknown load is proposed. This scheme uses an extended nonlinear reduced-order observer to estimate the induced electromotive force (EMF) and load torque. From the estimated variables, the rotor position, the rotor speed, and the position derivative of flux are calculated and are used to close the control loop. In order to improve the drive performance, the estimated load torque is incorporated as a feedforward signal in the closed control loop. In addition, the proposed sensorless PMACM drive allows the torque-ripple and copper-loss minimization for motors with an arbitrary EMF waveform. Simulation and experimental results to validate the proposal are presented in this paper.
Energy Conversion and Management, 2011
This paper aims to complement studies concerning the influence of voltage unbalance on the perfor... more This paper aims to complement studies concerning the influence of voltage unbalance on the performance of induction motors. We use sequence equivalent circuits to determine the increase of losses in the induction motor. We take into account the dependence of the rotor negative-sequence reactance with the load state and the increase in rotor resistance with the negative-sequence currents. Variations in the negative-sequence impedance are related with the structural characteristics of the rotor. We analyze motors with open and closed rotor slots, because the impedance of rotors with closed slots grows considerably when the load is less than rated, producing lower negative-sequence currents and lower losses. Increased rotor impedance in closed slot motors protects these motors against problems due to unbalanced supply voltage. For both type of rotors, we analyze motor derating factor based on voltage unbalance and increases in total losses and rotor losses.► We study the increase of losses in the induction motor (IM) with voltage unbalance. ► We take into account the variations in the negative-sequence impedance of the rotor. ► We analyze the performance in IM with open and closed rotor slots. ► For both type of rotors, we get the derating factor for different levels of unbalance. ► IM with closed-slot are less affected by voltage unbalance than open-slot ones.
Effects of rotor faults on stator currents in induction motors are studied in the present work. P... more Effects of rotor faults on stator currents in induction motors are studied in the present work. Particularly, the effects of such faults on the sidebands at fundamental and harmonics current components are analyzed. A multiple-coupled circuit model determines the variation of amplitude of these sidebands as a function of the number of broken bars, load and motor-load inertia. The results obtained from this analysis allow improving the rotor fault diagnosis techniques and identifying and separating rotor faults from others. Simulation and experimental results are presented to validate the proposal.
1, 2, 4 Grupo de Electrónica Aplicada, Universidad Nacional de Río Cuarto Ruta Nacional #36, Km. ... more 1, 2, 4 Grupo de Electrónica Aplicada, Universidad Nacional de Río Cuarto Ruta Nacional #36, Km. 601, (5800) Río Cuarto, Córdoba, Argentina Tel.: +54-358-4676255; Fax: +54-358-4676246 gbossio@ing.unrc.edu.ar; cdeangelo@ieee.org; g.garcia@ieee.org
IEEE Transactions on Energy Conversion, 2004
IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 19, NO. 1, MARCH 2004 ... A 2-D Model of the Inducti... more IEEE TRANSACTIONS ON ENERGY CONVERSION, VOL. 19, NO. 1, MARCH 2004 ... A 2-D Model of the Induction Machine: An Extension ... Guillermo Bossio, Cristian De Angelo, Student Member, IEEE, Jorge Solsona, Member, IEEE, Guillermo García, Senior Member, IEEE, ...
A sensorless strategy for speed control of permanent motors driving an unknown load torque is pre... more A sensorless strategy for speed control of permanent motors driving an unknown load torque is presented. The proposed strategy uses an extended non-linear reduced-order observer that includes information about the waveform of the EMF generated by the motor, which is neither sinusoidal nor trapezoidal. In order to improve the drive performance, the unknown disturbance torque is estimated by means of an adaptive law, and is incorporated as feedforward signal into the control loop. It allows the realization of torque control avoiding position sensor and with minimum torque ripple. Simulation results that validate the proposal are shown.
A method for the analysis of a position estimation strategy for induction motors is presented. A ... more A method for the analysis of a position estimation strategy for induction motors is presented. A model of multiple-coupled circuits, whose parameters are calculated from the winding geometry and distribution, is used for the analysis. The analyzed estimation strategy is based on the variation of the inductance between stator windings and rotor bars. The rotor position is obtained from the
1,2 y 4 Grupo de Electrónica Aplicada (GEA), Universidad Nacional de Río Cuarto Ruta Nacional #36... more 1,2 y 4 Grupo de Electrónica Aplicada (GEA), Universidad Nacional de Río Cuarto Ruta Nacional #36, Km. 601, (5800) Río Cuarto, Córdoba, Argentina Tel.: +54-358-4676255; Fax: +54-358-4676246 cdeangelo@ieee.org; gbossio@ing.unrc.edu.ar; g.garcia@ieee.org
... [3] Manés F Cabanas, Carlos H. Rojas, Manuel García Maleno, Gonzalo A. Orcajo, Manuel P. Dons... more ... [3] Manés F Cabanas, Carlos H. Rojas, Manuel García Maleno, Gonzalo A. Orcajo, Manuel P. Donsión. ... [4] Obaid, RR; Habetler, TG; Current-based algorithm for mechanical fault detection in induction motors with arbitrary load conditions. In-...
The effect of rotor faults, such as broken bars and end rings, over the signals of a position est... more The effect of rotor faults, such as broken bars and end rings, over the signals of a position estimation strategy for induction motor drives is analyzed using a multiple coupled circuit model. The objective is to establish the possibility of using the estimation strategy signals for fault diagnosis in variable speed electric drives. This strategy is based on the effect produced by inductance variation on the zero sequence voltage, exciting the motor with a predefined inverter-switching pattern. Experimental results illustrate the feasibility of the proposal.
In this work a stator winding turn fault diagnosis strategy in induction motor drives is proposed... more In this work a stator winding turn fault diagnosis strategy in induction motor drives is proposed. The strategy is based on the effect of the inductance variations, produced by the faults, over the cero sequence voltage when the motor is excited with a predefined inverter switching pattern applied by the inverter.
In this work, a method to minimize DC motor drive losses is presented. It is based on a model tha... more In this work, a method to minimize DC motor drive losses is presented. It is based on a model that includes motor and converter losses. The method is theoretically presented and experimental results to validate the theory are shown. A controller for torque and speed is proposed
IEEE Transactions on Industrial Electronics, 2005
A new nonlinear reduced-order observer to estimate the rotor speed and position for permanent-mag... more A new nonlinear reduced-order observer to estimate the rotor speed and position for permanent-magnet motors, with arbitrary electromotive force (EMF) waveform, is presented. The proposed observer is suitable for the realization of a torque control with minimum torque ripple. In order to implement the observer, the EMF generated by the motor is first obtained experimentally offline. After that, it is approximated by a Fourier series in order to develop the model to be used in the online estimation. From the estimated EMF, rotor position and speed are calculated using the relationship between the EMF and the rotor variables. The proposal is validated with experimental results.
IEEE Transactions on Industry Applications, 2005
Page 1. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 41, NO. 4, JULY/AUGUST 2005 1005 Effects... more Page 1. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 41, NO. 4, JULY/AUGUST 2005 1005 Effects of Rotor Bar and End-Ring Faults Over the Signals of a Position Estimation Strategy for Induction Motors Guillermo ...
IEEE Transactions on Industrial Electronics, 2009
A new method for broken rotor bars and load oscillation diagnosis on induction motors is presente... more A new method for broken rotor bars and load oscillation diagnosis on induction motors is presented. The proposed strategy is based on the decomposition of the stator currents into their instantaneous active and reactive current components. Such components allow the decoupling of the effects produced by rotor asymmetries from those produced by oscillating loads. This allows not only the proper fault detection but also a correct fault diagnosis. Simulation and experimental results, both from laboratory and industrial cases, are presented to validate the proposal.
IEEE Transactions on Industrial Electronics, 2009
In this paper, a model-based strategy for statorinterturn short-circuit detection on induction mo... more In this paper, a model-based strategy for statorinterturn short-circuit detection on induction motors is presented. The proposed strategy is based on the generation of a vector of specific residual using a state observer. The vectorial residual is generated from a decomposition of the current estimation error. This allows for a fast detection of incipient faults, independently of the phase in which the fault occurs. Since the observer includes an adaptive scheme for rotor-speed estimation, the proposed scheme can be implemented for online monitoring, by measuring only stator voltages and currents. It is shown that the proposed strategy presents very low sensitivity to load variations and power-supply perturbations. Experimental results are included to show the ability of the proposed strategy for detecting incipient faults, including a low number of short-circuited turns and low fault current.
Resumen: Se presenta el análisis y diseño de un convertidor reductor-elevador bidireccional, incl... more Resumen: Se presenta el análisis y diseño de un convertidor reductor-elevador bidireccional, incluyendo su control. El convertidor fue diseñado para ser usado en un accionamiento con un motor de imanes permanentes de flujo axial para vehículos eléctricos. El objetivo de este convertidor es controlar el flujo de energía desde y hacia un banco de baterías, regulando la tensión de alimentación
IEEE Transactions on Energy Conversion, 2006
AbstractIn this paper, the application of an additional excita-tion in induction motor (IM) driv... more AbstractIn this paper, the application of an additional excita-tion in induction motor (IM) drives for static, dynamic, and mixed eccentricity diagnosis is proposed. The additional excitation con-sists in a predefined inverter-switching pattern that is applied on the motor for a short ...
Resumen En los últimos años algunos investigadores han propuesto e implementado variadas altern... more Resumen En los últimos años algunos investigadores han propuesto e implementado variadas alternativas para la detección y diagnóstico de fallas en maquinas de inducción. Algunas metodologías se caracterizan por su carácter no invasivo ya que no se montan sensores sobre el ...