Maurice Apap - Academia.edu (original) (raw)
Papers by Maurice Apap
2008 IEEE International Symposium on Industrial Electronics, 2008
Page 1. Reducing the Common Mode Voltage in a DTC-PMSM drive using Matrix Converters Carlos Orteg... more Page 1. Reducing the Common Mode Voltage in a DTC-PMSM drive using Matrix Converters Carlos Ortega Electronic Department Escola Universit`aria Salesiana de Sarri`a Barcelona, Spain Email: cortega@euss.es Antoni ...
2007 European Conference on Power Electronics and Applications, 2007
Carlos Ortega1, Antoni Arias 2, Cedric Caruana 3, Maurice Apap3, Josep Balcells2, 1Electronics De... more Carlos Ortega1, Antoni Arias 2, Cedric Caruana 3, Maurice Apap3, Josep Balcells2, 1Electronics Dept. Escola Universitària Salesiana de Sarrià. Barcelona, Spain. 2Electronics Engineering Dept. Universitat Politècnica de Catalunya. Terrassa, Spain. 3 Power Electronics Dept. ...
IEEE Transactions on Industrial Electronics, 2002
This paper is concerned with the process of current commutation in matrix converters. The mechani... more This paper is concerned with the process of current commutation in matrix converters. The mechanisms involved in the commutation process are described and practical waveforms are presented. A novel commutation strategy is described that uses gate drive level intelligence in the form of a field-programmable gate array. Current direction is determined using device voltages and, therefore, the measurement problems associated with all other commutation methods are overcome. Practical results from an 18-kW matrix converter induction motor drive are presented.
IEEE Transactions on Industrial Electronics, 2008
This paper quantifies the extra harmonic losses in an induction motor that are associated with th... more This paper quantifies the extra harmonic losses in an induction motor that are associated with the use of a matrix converter topology as a motor drive. These extra losses are compared to the harmonic losses associated with an inverter-based motor drive. The technique employed in the determination of the harmonic losses is described. For the matrix converter, the extra harmonic losses associated with two commonly used modulation techniques are calculated and compared. The impact of these extra losses on the cooling requirements and operation of the motor is considered.
2008 15th IEEE International Conference on Electronics, Circuits and Systems, 2008
... Converters Carlos Ortega Electronic Department Escola Universit`aria Salesiana de Sarri`a Bar... more ... Converters Carlos Ortega Electronic Department Escola Universit`aria Salesiana de Sarri`a Barcelona, Spain Email: cortega@euss.es Antoni Arias Electronic Department Univeristat Polit`ecnica de Catalunya Terrassa, Spain Email: arias@eel.upc.edu ...
This paper describes the design, construction and testing of a matrix converter permanent magnet ... more This paper describes the design, construction and testing of a matrix converter permanent magnet motor drive for an electro-hydrostatic aircraft actuator (ERA). The converter has been built using a 35Amp Eupec matrix converter module with closed loop vector control. The commutation time has been minimized to avoid any unnecessary waveform distortion. Practical results from the testing of this converter are presented.
IEEE Transactions on Industrial Electronics, 2007
Matrix converters are becoming a real alternative to traditional topologies for many ac-ac power ... more Matrix converters are becoming a real alternative to traditional topologies for many ac-ac power conversion applications. One of the less well-known advantages is the potential for reduced waveform distortion that arise from device characteristics and commutation delays. This paper describes the origin of distortion effects for a matrix converter with current sign-based commutation and gives a novel approach to the method that can, in principle, eliminate the distorting effects to give a power converter having excellent linear behavior. The effectiveness of compensation techniques are illustrated for both an open-loop matrix converter driving a passive load and a matrix converter as part of a vector-controlled drive.
Eurocon 2013, 2013
ABSTRACT This paper presents the study of a sensorless speed controlled Doubly-Fed Induction Mach... more ABSTRACT This paper presents the study of a sensorless speed controlled Doubly-Fed Induction Machine (DFIM) using a Model Reference Adaptive System (MRAS). Various Stator Flux Voltage Models found in literature were implemented on a DFIM driven by a rotor side matrix converter. Simulation results for the sensorless closed loop control are presented in the range of operation of a typical wind turbine and rotor angle/speed estimates are presented for each of the Voltage Models.
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
Parallel inverters having LCL output filters cause voltage distortions at the point of common cou... more Parallel inverters having LCL output filters cause voltage distortions at the point of common coupling (PCC) in islanded microgrids when non-linear loads are present. A capacitive virtual impedance loop could be used to provide selective harmonic compensation in islanded microgrids, instead of introducing additional active or passive filters into the system that could compromise the stability of the microgrid. However, the performance of these compensation loops becomes degraded when a virtual resistance is introduced with the aim to improve the overall stability of the parallel inverters. With the capacitive virtual impedance, there is effectively a compromise between the additional stability provided by the virtual resistance and the harmonic compensation due to the virtual capacitance. This paper focuses on overcoming this limitation of the capacitive virtual impedance with additional virtual resistance for selective harmonic compensation in islanded microgrids. Simulation results were given to show the suitability of the proposed algorithms in reducing the voltage harmonics at the PCC.
ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483), 2001
Email: jcilia@,eng.um.edu.mt, cispit@,engum.edu.mt, vibutt@eng.um.edu.mt University of Malta, Msi... more Email: jcilia@,eng.um.edu.mt, cispit@,engum.edu.mt, vibutt@eng.um.edu.mt University of Malta, Msida. MSD06, Malta. FAX: 00356 343 577, TEL: 00356 333995 ... This paper presents the design of an electric vehicle (EV) for operation over short distances (approximately ...
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of rotor side current harmonics, on the control scheme were analysed. The paper also presents experimental results for active and reactive power control for the variable speed DFIM including operation at zero Stator Reactive power.
MELECON - IEEE Mediterranean Electrotechnical Conference, 2010
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of harmonics, present in the rotor windings, on the control scheme were analysed. The paper also presents experimental results for power control and variable speed operation of the DFIM.
International Symposium on Control, Communications and Signal Processing, 2008
Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix conve... more Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix converter for the control of a three phase induction motor. The advantages of such a converter are that power flow is inherently bidirectional so that four-quadrant operation is ...
2010 IEEE International Symposium on Industrial Electronics, 2010
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of rotor side current harmonics, on the control scheme were analysed. The paper also presents experimental results for active and reactive power control for the variable speed DFIM including operation at zero Stator Reactive power.
Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of rotor side current harmonics, on the control scheme were analysed. The paper also presents experimental results for active and reactive power control for the variable speed DFIM including operation at zero Stator Reactive power.
2008 3rd International Symposium on Communications, Control and Signal Processing, 2008
Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix conve... more Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix converter for the control of a three phase induction motor. The advantages of such a converter are that power flow is inherently bidirectional so that four-quadrant operation is ...
Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010
... 3, San Francisco, 1996. [7] G. Grandi, D. Casadei and U. Reggiani, Common-and Differential-M... more ... 3, San Francisco, 1996. [7] G. Grandi, D. Casadei and U. Reggiani, Common-and Differential-Mode HF Current Components in AC Motors Supplied by Voltage Source Inverters, IEEE Trans. Power Electr., Vol. 19, No. 1, January 2004. ...
Inorganic Chemistry Communications, 2001
This paper presents the design of an electric vehicle (EV) for operation over short distances (ap... more This paper presents the design of an electric vehicle (EV) for operation over short distances (approximately 80 km) with an average speed of 80 km/h. These specifications were chosen to fulfil the daily transport needs of a small island such as Malta
2008 IEEE International Symposium on Industrial Electronics, 2008
Page 1. Reducing the Common Mode Voltage in a DTC-PMSM drive using Matrix Converters Carlos Orteg... more Page 1. Reducing the Common Mode Voltage in a DTC-PMSM drive using Matrix Converters Carlos Ortega Electronic Department Escola Universit`aria Salesiana de Sarri`a Barcelona, Spain Email: cortega@euss.es Antoni ...
2007 European Conference on Power Electronics and Applications, 2007
Carlos Ortega1, Antoni Arias 2, Cedric Caruana 3, Maurice Apap3, Josep Balcells2, 1Electronics De... more Carlos Ortega1, Antoni Arias 2, Cedric Caruana 3, Maurice Apap3, Josep Balcells2, 1Electronics Dept. Escola Universitària Salesiana de Sarrià. Barcelona, Spain. 2Electronics Engineering Dept. Universitat Politècnica de Catalunya. Terrassa, Spain. 3 Power Electronics Dept. ...
IEEE Transactions on Industrial Electronics, 2002
This paper is concerned with the process of current commutation in matrix converters. The mechani... more This paper is concerned with the process of current commutation in matrix converters. The mechanisms involved in the commutation process are described and practical waveforms are presented. A novel commutation strategy is described that uses gate drive level intelligence in the form of a field-programmable gate array. Current direction is determined using device voltages and, therefore, the measurement problems associated with all other commutation methods are overcome. Practical results from an 18-kW matrix converter induction motor drive are presented.
IEEE Transactions on Industrial Electronics, 2008
This paper quantifies the extra harmonic losses in an induction motor that are associated with th... more This paper quantifies the extra harmonic losses in an induction motor that are associated with the use of a matrix converter topology as a motor drive. These extra losses are compared to the harmonic losses associated with an inverter-based motor drive. The technique employed in the determination of the harmonic losses is described. For the matrix converter, the extra harmonic losses associated with two commonly used modulation techniques are calculated and compared. The impact of these extra losses on the cooling requirements and operation of the motor is considered.
2008 15th IEEE International Conference on Electronics, Circuits and Systems, 2008
... Converters Carlos Ortega Electronic Department Escola Universit`aria Salesiana de Sarri`a Bar... more ... Converters Carlos Ortega Electronic Department Escola Universit`aria Salesiana de Sarri`a Barcelona, Spain Email: cortega@euss.es Antoni Arias Electronic Department Univeristat Polit`ecnica de Catalunya Terrassa, Spain Email: arias@eel.upc.edu ...
This paper describes the design, construction and testing of a matrix converter permanent magnet ... more This paper describes the design, construction and testing of a matrix converter permanent magnet motor drive for an electro-hydrostatic aircraft actuator (ERA). The converter has been built using a 35Amp Eupec matrix converter module with closed loop vector control. The commutation time has been minimized to avoid any unnecessary waveform distortion. Practical results from the testing of this converter are presented.
IEEE Transactions on Industrial Electronics, 2007
Matrix converters are becoming a real alternative to traditional topologies for many ac-ac power ... more Matrix converters are becoming a real alternative to traditional topologies for many ac-ac power conversion applications. One of the less well-known advantages is the potential for reduced waveform distortion that arise from device characteristics and commutation delays. This paper describes the origin of distortion effects for a matrix converter with current sign-based commutation and gives a novel approach to the method that can, in principle, eliminate the distorting effects to give a power converter having excellent linear behavior. The effectiveness of compensation techniques are illustrated for both an open-loop matrix converter driving a passive load and a matrix converter as part of a vector-controlled drive.
Eurocon 2013, 2013
ABSTRACT This paper presents the study of a sensorless speed controlled Doubly-Fed Induction Mach... more ABSTRACT This paper presents the study of a sensorless speed controlled Doubly-Fed Induction Machine (DFIM) using a Model Reference Adaptive System (MRAS). Various Stator Flux Voltage Models found in literature were implemented on a DFIM driven by a rotor side matrix converter. Simulation results for the sensorless closed loop control are presented in the range of operation of a typical wind turbine and rotor angle/speed estimates are presented for each of the Voltage Models.
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
Parallel inverters having LCL output filters cause voltage distortions at the point of common cou... more Parallel inverters having LCL output filters cause voltage distortions at the point of common coupling (PCC) in islanded microgrids when non-linear loads are present. A capacitive virtual impedance loop could be used to provide selective harmonic compensation in islanded microgrids, instead of introducing additional active or passive filters into the system that could compromise the stability of the microgrid. However, the performance of these compensation loops becomes degraded when a virtual resistance is introduced with the aim to improve the overall stability of the parallel inverters. With the capacitive virtual impedance, there is effectively a compromise between the additional stability provided by the virtual resistance and the harmonic compensation due to the virtual capacitance. This paper focuses on overcoming this limitation of the capacitive virtual impedance with additional virtual resistance for selective harmonic compensation in islanded microgrids. Simulation results were given to show the suitability of the proposed algorithms in reducing the voltage harmonics at the PCC.
ICECS 2001. 8th IEEE International Conference on Electronics, Circuits and Systems (Cat. No.01EX483), 2001
Email: jcilia@,eng.um.edu.mt, cispit@,engum.edu.mt, vibutt@eng.um.edu.mt University of Malta, Msi... more Email: jcilia@,eng.um.edu.mt, cispit@,engum.edu.mt, vibutt@eng.um.edu.mt University of Malta, Msida. MSD06, Malta. FAX: 00356 343 577, TEL: 00356 333995 ... This paper presents the design of an electric vehicle (EV) for operation over short distances (approximately ...
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of rotor side current harmonics, on the control scheme were analysed. The paper also presents experimental results for active and reactive power control for the variable speed DFIM including operation at zero Stator Reactive power.
MELECON - IEEE Mediterranean Electrotechnical Conference, 2010
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of harmonics, present in the rotor windings, on the control scheme were analysed. The paper also presents experimental results for power control and variable speed operation of the DFIM.
International Symposium on Control, Communications and Signal Processing, 2008
Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix conve... more Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix converter for the control of a three phase induction motor. The advantages of such a converter are that power flow is inherently bidirectional so that four-quadrant operation is ...
2010 IEEE International Symposium on Industrial Electronics, 2010
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of rotor side current harmonics, on the control scheme were analysed. The paper also presents experimental results for active and reactive power control for the variable speed DFIM including operation at zero Stator Reactive power.
Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010
This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter a... more This paper presents the control of a doubly fed induction machine (DFIM) via a matrix converter applied to the machine's rotor side. The experimental set-up shall be used to show its viability for wind energy applications. Stator Field Oriented control of the machine was implemented for active and reactive power control. The effects of rotor side current harmonics, on the control scheme were analysed. The paper also presents experimental results for active and reactive power control for the variable speed DFIM including operation at zero Stator Reactive power.
2008 3rd International Symposium on Communications, Control and Signal Processing, 2008
Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix conve... more Abstract This paper describes the development of a 1.9 kVA bi-directional power flow matrix converter for the control of a three phase induction motor. The advantages of such a converter are that power flow is inherently bidirectional so that four-quadrant operation is ...
Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010
... 3, San Francisco, 1996. [7] G. Grandi, D. Casadei and U. Reggiani, Common-and Differential-M... more ... 3, San Francisco, 1996. [7] G. Grandi, D. Casadei and U. Reggiani, Common-and Differential-Mode HF Current Components in AC Motors Supplied by Voltage Source Inverters, IEEE Trans. Power Electr., Vol. 19, No. 1, January 2004. ...
Inorganic Chemistry Communications, 2001
This paper presents the design of an electric vehicle (EV) for operation over short distances (ap... more This paper presents the design of an electric vehicle (EV) for operation over short distances (approximately 80 km) with an average speed of 80 km/h. These specifications were chosen to fulfil the daily transport needs of a small island such as Malta