Karel Jezernik - Academia.edu (original) (raw)

Papers by Karel Jezernik

2010 IEEE International Symposium on Industrial Electronics, 2010

IEEE Transactions on Energy Conversion, 2006

IFAC Proceedings Volumes, 1996

IFAC Proceedings Volumes, 1996

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, 2012

ABSTRACT This paper proposes the field programmable gate array (FPGA) implementation of a variabl... more ABSTRACT This paper proposes the field programmable gate array (FPGA) implementation of a variable structure system (VSS) predictive sequential switching control strategy, as applied to a permanent magnet synchronous machine (PMSM). In the case of AC motor drives, in contrast to conventional vector control where the inverter is not taken into consideration by the controller, the proposed control integrates the inverter model and considers the states of inverter switches as a control variable. It allows the obtaining of faster torque dynamics rather than vector control algorithms. The main design specifications are a reduced switching frequency and simple hardware implementation. A predictive sliding mode controller has been developed, designed as finite state automata (FSM), and implemented with a FPGA. This new logic FPGA torque and speed controller has been developed, analyzed, and experimentally verified.

Proceedings of 4th IEEE International Workshop on Advanced Motion Control - AMC '96 - MIE

... The act,ual current tracks the desired value without delay, it is ro-bust to the variations o... more ... The act,ual current tracks the desired value without delay, it is ro-bust to the variations of rotor resistance RI% and mutual inductance L,, and it decouples the influences interact-ing between atatnr windings WP assunr~ that the rotor flux behaves like a disturbance acting in a ...

2008 34th Annual Conference of IEEE Industrial Electronics, 2008

ABSTRACT A new, the torque and speed sensorless induction motor control is proposed, analyzed and... more ABSTRACT A new, the torque and speed sensorless induction motor control is proposed, analyzed and experimentally verified in this paper. The control is based on stator and rotor flux as state variables. This choice of state variables allows a graphical representation which is transparent and insightful. A speed sensorless implementation of the control is demonstrated experimentally for low speed operation. Proposed control scheme is implemented on DSP system extended with FPGA circuit. Experimental results demonstrated high efficiency of the proposed estimation and control approach.

Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010

ABSTRACT This study presents a novel means of designing a simple and effective torque control for... more ABSTRACT This study presents a novel means of designing a simple and effective torque control for Permanent Magnet Synchronous Motor (PMSM). The overall stability of the system is shown using Lyapunov technique. The Lyapunov functions used contain a term penalizing incremental energy of control error, torque and stator flux, enhancing the stability. A new logical FPGA torque controller and flux observer based on Lyapunov theory are developed, analyzed and experimentally verified.

IEEE EUROCON 2009, 2009

ABSTRACT This paper presents a FPGA-based digital control for a DC-DC converter. The main differe... more ABSTRACT This paper presents a FPGA-based digital control for a DC-DC converter. The main difference from DSP-based solution is that FPGA allows simultaneous execution of all control procedures, enabling high performance and novel control methods. The control algorithm has been developed using a VHDL language or CAD state graphical approach based on the use of logical state diagram. The FPGA switching controller has been designed as simple as possible while maintaining good accuracy and dynamic response. A sliding mode switching controller via Lyapunov design presented in this paper has been implemented on a SPARTAN 3 for a prototype buck converter. The high computation power of FPGA allows digital implementation of more advanced control algorithms such as sliding mode controller. Simulations and experimental results show the feasibility of the proposed method, opening interesting possibilities in motion and power electronics converter control.

2002 IEEE World Congress on Computational Intelligence. 2002 IEEE International Conference on Fuzzy Systems. FUZZ-IEEE'02. Proceedings (Cat. No.02CH37291)

Abstract - This paper gives a survey of fuzzy rule base reduction methods. The research of comple... more Abstract - This paper gives a survey of fuzzy rule base reduction methods. The research of complex-ity reduction methods are originated form two as-pects depending of different design methodologies of the model. The first model design type comes from the original idea of ...

2006 12th International Power Electronics and Motion Control Conference, 2006

An approach to discrete-time sliding-mode (SM) current control and conventional SM with smoothing... more An approach to discrete-time sliding-mode (SM) current control and conventional SM with smoothing filter is presented for field-oriented induction motor (IM) drives. Design of both proposed SM controllers is based on space vector PWM scheme by introducing some parts of the stator model as control input, which may correspond to voltage vector command. The control input was obtained employing the

2007 European Conference on Power Electronics and Applications, 2007

ABSTRACT This paper introduces a new sequential switching control strategy for a current control ... more ABSTRACT This paper introduces a new sequential switching control strategy for a current control of a three phase inverter. The key idea, presented in this paper, is to integrate the benefits of the variable structure system control design and the event-driven sequential control structures to raise the system performance and to improve the control efficiency. Twofold design covers the switching conditions determination using the Lyapunov stability criteria and the event- driven sequential switching pattern design for the switching of inverter transistors. The proposed control design is applied for the control of three phase permanent magnet synchronous machine.

2008 10th IEEE International Workshop on Advanced Motion Control, 2008

In this paper we investigate the advantages and feasibility of motor control using very fast (MHz... more In this paper we investigate the advantages and feasibility of motor control using very fast (MHz) switching in place of traditional amplifiers. We also propose integrated motion-control architecture based on a sliding mode control to be implemented in digital logic at an equally high rate. A switching controller combines the current and motion feedback paths into a single loop. A model-based observer estimates the load torque. When compared to second-order controllers implemented with traditional amplifiers, the proposed design promises increased performance, better efficiency, and improved load estimation. Recent advances in semiconductor technology provide the required fast switching and logic with relatively standard components. Simple implementation make concepts of switching control very attractive in motion control systems like control of dc or ac servomotors. The control algorithm designed by proposed approach can be easily implemented on DSP/FPGA platforms.

5th IFAC Symposium on Mechatronic Systems (2010), 2010

ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings

This paper shows that logic programming languages, such as PROLOG, provide useful computational l... more This paper shows that logic programming languages, such as PROLOG, provide useful computational logic for modelling, simulating and verifying real-time discrete event processes. The notion of a timed transition model (TTM) is provided as a generic computational model for real-time systems and real-time temporal logic (RTTL) is used for specifying the properties to be verified. Automatic testing and simulation of safety properties of the system specification by the logic programming language PROLOG is presented using the example of a simplified TTM press line model. Interest is limited to the use of PROLOG in the construction and checking of proof diagrams for the time invariance of system specifications.<<ETX>>

IET Power Electronics, 2013

ABSTRACT

A drive system which consist of an induction motor (IM) and isolated gate bipolar transistor thre... more A drive system which consist of an induction motor (IM) and isolated gate bipolar transistor three phase inverter for electric vehicle (EV) propulsion is presented. Efforts have been made to ensure efficient operation of sliding mode torque and flux vector control of IM. A simple, robust and novel control strategy is proposed for driving and regenerative braking of EV. The

ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics

ABSTRACT Indirect vector controlled induction motor drives exhibit excellent behaviour even in th... more ABSTRACT Indirect vector controlled induction motor drives exhibit excellent behaviour even in the low speed region. Thus these motors can be advantageously employed as actuators in several high-performance motor applications. Since the indirect vector control scheme is sensitive to changes in the rotor time constant, the implementation of an estimation mechanism is essential for the success of such a control system. In this paper, a new rotor time constant estimation method for an indirect vector-controlled induction motor drive is described. Its features are simple and cheap implementation and independence of motor parameters which drift with temperature. It does not require any additional transducers or any injected test signals to the stator. The estimation is performed while the loaded motor operates under steady-state conditions. Simulation results are presented which verify the proposed estimation scheme

2000 26th Annual Conference of the IEEE Industrial Electronics Society. IECON 2000. 2000 IEEE International Conference on Industrial Electronics, Control and Instrumentation. 21st Century Technologies and Industrial Opportunities (Cat. No.00CH37141)

ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)

ABSTRACT

2010 IEEE International Symposium on Industrial Electronics, 2010

IEEE Transactions on Energy Conversion, 2006

IFAC Proceedings Volumes, 1996

IFAC Proceedings Volumes, 1996

International Symposium on Power Electronics Power Electronics, Electrical Drives, Automation and Motion, 2012

ABSTRACT This paper proposes the field programmable gate array (FPGA) implementation of a variabl... more ABSTRACT This paper proposes the field programmable gate array (FPGA) implementation of a variable structure system (VSS) predictive sequential switching control strategy, as applied to a permanent magnet synchronous machine (PMSM). In the case of AC motor drives, in contrast to conventional vector control where the inverter is not taken into consideration by the controller, the proposed control integrates the inverter model and considers the states of inverter switches as a control variable. It allows the obtaining of faster torque dynamics rather than vector control algorithms. The main design specifications are a reduced switching frequency and simple hardware implementation. A predictive sliding mode controller has been developed, designed as finite state automata (FSM), and implemented with a FPGA. This new logic FPGA torque and speed controller has been developed, analyzed, and experimentally verified.

Proceedings of 4th IEEE International Workshop on Advanced Motion Control - AMC '96 - MIE

... The act,ual current tracks the desired value without delay, it is ro-bust to the variations o... more ... The act,ual current tracks the desired value without delay, it is ro-bust to the variations of rotor resistance RI% and mutual inductance L,, and it decouples the influences interact-ing between atatnr windings WP assunr~ that the rotor flux behaves like a disturbance acting in a ...

2008 34th Annual Conference of IEEE Industrial Electronics, 2008

ABSTRACT A new, the torque and speed sensorless induction motor control is proposed, analyzed and... more ABSTRACT A new, the torque and speed sensorless induction motor control is proposed, analyzed and experimentally verified in this paper. The control is based on stator and rotor flux as state variables. This choice of state variables allows a graphical representation which is transparent and insightful. A speed sensorless implementation of the control is demonstrated experimentally for low speed operation. Proposed control scheme is implemented on DSP system extended with FPGA circuit. Experimental results demonstrated high efficiency of the proposed estimation and control approach.

Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 2010

ABSTRACT This study presents a novel means of designing a simple and effective torque control for... more ABSTRACT This study presents a novel means of designing a simple and effective torque control for Permanent Magnet Synchronous Motor (PMSM). The overall stability of the system is shown using Lyapunov technique. The Lyapunov functions used contain a term penalizing incremental energy of control error, torque and stator flux, enhancing the stability. A new logical FPGA torque controller and flux observer based on Lyapunov theory are developed, analyzed and experimentally verified.

IEEE EUROCON 2009, 2009

ABSTRACT This paper presents a FPGA-based digital control for a DC-DC converter. The main differe... more ABSTRACT This paper presents a FPGA-based digital control for a DC-DC converter. The main difference from DSP-based solution is that FPGA allows simultaneous execution of all control procedures, enabling high performance and novel control methods. The control algorithm has been developed using a VHDL language or CAD state graphical approach based on the use of logical state diagram. The FPGA switching controller has been designed as simple as possible while maintaining good accuracy and dynamic response. A sliding mode switching controller via Lyapunov design presented in this paper has been implemented on a SPARTAN 3 for a prototype buck converter. The high computation power of FPGA allows digital implementation of more advanced control algorithms such as sliding mode controller. Simulations and experimental results show the feasibility of the proposed method, opening interesting possibilities in motion and power electronics converter control.

2002 IEEE World Congress on Computational Intelligence. 2002 IEEE International Conference on Fuzzy Systems. FUZZ-IEEE'02. Proceedings (Cat. No.02CH37291)

Abstract - This paper gives a survey of fuzzy rule base reduction methods. The research of comple... more Abstract - This paper gives a survey of fuzzy rule base reduction methods. The research of complex-ity reduction methods are originated form two as-pects depending of different design methodologies of the model. The first model design type comes from the original idea of ...

2006 12th International Power Electronics and Motion Control Conference, 2006

An approach to discrete-time sliding-mode (SM) current control and conventional SM with smoothing... more An approach to discrete-time sliding-mode (SM) current control and conventional SM with smoothing filter is presented for field-oriented induction motor (IM) drives. Design of both proposed SM controllers is based on space vector PWM scheme by introducing some parts of the stator model as control input, which may correspond to voltage vector command. The control input was obtained employing the

2007 European Conference on Power Electronics and Applications, 2007

ABSTRACT This paper introduces a new sequential switching control strategy for a current control ... more ABSTRACT This paper introduces a new sequential switching control strategy for a current control of a three phase inverter. The key idea, presented in this paper, is to integrate the benefits of the variable structure system control design and the event-driven sequential control structures to raise the system performance and to improve the control efficiency. Twofold design covers the switching conditions determination using the Lyapunov stability criteria and the event- driven sequential switching pattern design for the switching of inverter transistors. The proposed control design is applied for the control of three phase permanent magnet synchronous machine.

2008 10th IEEE International Workshop on Advanced Motion Control, 2008

In this paper we investigate the advantages and feasibility of motor control using very fast (MHz... more In this paper we investigate the advantages and feasibility of motor control using very fast (MHz) switching in place of traditional amplifiers. We also propose integrated motion-control architecture based on a sliding mode control to be implemented in digital logic at an equally high rate. A switching controller combines the current and motion feedback paths into a single loop. A model-based observer estimates the load torque. When compared to second-order controllers implemented with traditional amplifiers, the proposed design promises increased performance, better efficiency, and improved load estimation. Recent advances in semiconductor technology provide the required fast switching and logic with relatively standard components. Simple implementation make concepts of switching control very attractive in motion control systems like control of dc or ac servomotors. The control algorithm designed by proposed approach can be easily implemented on DSP/FPGA platforms.

5th IFAC Symposium on Mechatronic Systems (2010), 2010

ISIE '93 - Budapest: IEEE International Symposium on Industrial Electronics Conference Proceedings

This paper shows that logic programming languages, such as PROLOG, provide useful computational l... more This paper shows that logic programming languages, such as PROLOG, provide useful computational logic for modelling, simulating and verifying real-time discrete event processes. The notion of a timed transition model (TTM) is provided as a generic computational model for real-time systems and real-time temporal logic (RTTL) is used for specifying the properties to be verified. Automatic testing and simulation of safety properties of the system specification by the logic programming language PROLOG is presented using the example of a simplified TTM press line model. Interest is limited to the use of PROLOG in the construction and checking of proof diagrams for the time invariance of system specifications.<<ETX>>

IET Power Electronics, 2013

ABSTRACT

A drive system which consist of an induction motor (IM) and isolated gate bipolar transistor thre... more A drive system which consist of an induction motor (IM) and isolated gate bipolar transistor three phase inverter for electric vehicle (EV) propulsion is presented. Efforts have been made to ensure efficient operation of sliding mode torque and flux vector control of IM. A simple, robust and novel control strategy is proposed for driving and regenerative braking of EV. The

ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics

ABSTRACT Indirect vector controlled induction motor drives exhibit excellent behaviour even in th... more ABSTRACT Indirect vector controlled induction motor drives exhibit excellent behaviour even in the low speed region. Thus these motors can be advantageously employed as actuators in several high-performance motor applications. Since the indirect vector control scheme is sensitive to changes in the rotor time constant, the implementation of an estimation mechanism is essential for the success of such a control system. In this paper, a new rotor time constant estimation method for an indirect vector-controlled induction motor drive is described. Its features are simple and cheap implementation and independence of motor parameters which drift with temperature. It does not require any additional transducers or any injected test signals to the stator. The estimation is performed while the loaded motor operates under steady-state conditions. Simulation results are presented which verify the proposed estimation scheme

2000 26th Annual Conference of the IEEE Industrial Electronics Society. IECON 2000. 2000 IEEE International Conference on Industrial Electronics, Control and Instrumentation. 21st Century Technologies and Industrial Opportunities (Cat. No.00CH37141)

ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)

ABSTRACT