EPE Association: EPE-PEMC 2000 - Topic 03d: General Section

EPE-PEMC 2000 - Topic 03d: General Section
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 03: Control of Converters > EPE-PEMC 2000 - Topic 03d: General Section

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   Combined Control of Stabilized Impulse DC-Voltage Converters
By Sokol E.I., Goncharov Y.P., Kipensky A.V., Harisi H. [View]
[Download]

Abstract: Different variations of structures of combined control systems of impulse converters of DC-voltage (ICDCV) have been analyzed in this work. Unique systems have been proposed, which provide invariantness of output voltage of (ICDCV) to charges of its input voltage. Besides, the influence of several factors, coming from real parameters of power switches, on quality of regulation of output voltage of (ICDCV) has been considered and the systems have been proposed, which compensate the influence of those factors.

   Control of a Reversible AC/DC Voltage Converter Based on Input-Output Linearization without Load Current Sensor
By Marques G.D. [View]
[Download]

Abstract: This paper presents a modified control system for voltage type PWM AC to DC converters based on Input-Output linearization. This system is based on the direct control of two quantities: the DC capacitor voltage, via the direct current and reactive power. Two hysteresis current controllers in rotating frame co-ordinates are used as the inner loop. The method can be used also with other current controllers. An outer non-linear controller based on the input-output linearization sets the direct reference current. The synthesis of the DC voltage controller is done using some approximations. The control system presents high performances and is useful for inverter or rectifier operations. The major drawback, compared with other methods, is the need of a load current sensor. To solve this drawback a modified control system is presented in this paper. The load current is obtained using the DC current of the converter that can be easily obtained with the AC currents, the switching states of the semiconductor devices and the reference current of the capacitors.

   Controller Design for Auxiliary Resonant Commutated Pole Matrix Converter
By Teichmann R.*, Oyama J., Yamada E. [View]
[Download]

Abstract: The advantages and disadvantages of a soft switching matrix converter are discussed. A control scheme for the resonant commutations with minimum sensing effort is presented. The underlying mathematical basis is introduced. An experimental set-up representing a 6kW soft switching matrix converter is shown. Practical implementation issues with state-of-the-art control and device technology are discussed.

   Direct Self Control with Minimum Torque Ripple and High Dynamics for a Double Three-Level GTO Inverter Drive
By Janssen M., Steimel A. [View]
[Download]

Abstract: A highly dynamic control scheme with very low torque ripple - Direct Self Control with torque hysteresis control - for very high power medium voltage induction motor drives fed by a double three-level inverter is presented. The machine and inverter control are explained and the proposed torque quality and dynamic are verified by measurements at a 180 kW lab drive.

   Extended Kalman Filter Based Speed Sensorless AC Motor Control
By Fodor D., Vass J., Juhász Zs., Bíró K. A. [View]
[Download]

Abstract: The paper describes a method for speed sensorless control of an AC motor. Properly the extended Kalman filter is used for estimating the speed. The EKFT algorithm and its adaptation to the motor model are described by rigorous mathematical representation and they were realised in MATLAB Simulink. The simulation results show good dynamic behaviour suitable for DSP implementation.

   Hysteresis Current Regulation in IGBT Line Converter
By Perelmuter V. [View]
[Download]

Abstract: Line converter input current regulation in the rotating reference frame with using of the methods, that are inherent in the direct torque control, is investigated. The analytical relations are received for computation of the system main characteristics. The simulation, that illustrates an operation of the proposed system, and its comparison with the other known schemes are presented.

   Load Compensated Non-Linear Voltage Control of a Boost Type Rectifier
By Blasco-Giménez R.*, Peña R., Cárdenas R., Cartes J. [View]
[Download]

Abstract: This paper deals with the control of a three-phase Voltage-source current-regulated boost type PWM rectifier. The control scheme uses a synchronously rotating reference frame to control the input current on the rectifier. Given the non-linear nature of the DC link voltage dynamics, The square of the DC link voltage is defined as the controlled variable, to cancel the non-linear nature of the DC link voltage dynamics. Additionally, feed-forward or load compensation is used to overcome the time varying load and improve the transient response of the voltage control loop. The voltage controller and the feed-forward compensation set the reference d-axis current demand to balance the active power. The system including the vector control of the current control loops, the PWM strategy, the DC link voltage controller and the rectifier modelling has been simulated and an experimental rig has been set up to validate the control approach.

   Power Regulation and DC-Link Neutral Point Voltage Balance Control of Three-Level VSI Using a LQR-Based Gain-Scheduling Technique
By Alepuz S., Bordonau J.*, Peracaula J.* [View]
[Download]

Abstract: A simple and effective method to design the control strategy for a Three-Level VSI is introduced. Linear Quadratic Regulator (LQR) and Gain-Scheduling techniques work concurrently in the regulator. Any state variable can be regulated using the proposed method, either in small and large-signal operation. With the model and regulator presented, DC-link unbalance regulation is also achieved by means of the controller action. Then, a switching strategy to control DC-link neutral point voltage is not required. Simulation results verify the validity of the proposed controller design.

   Sliding Mode Control Parameters Optimization Using Genetics Algorithms
By Matas J., García de Vicuna L., López O., Castilla M., López M. [View]
[Download]

Abstract: A Genetic Algorithm to optimize the parameters of the sliding mode controllers for boost and buck-boost converters and for a modular power system is proposed. The algorithm is based on a performance index, which evaluates the converter transient response in order to optimize the following parameters: fast transient response, absence of steady-state errors in the output voltage, and robust output voltage responses against load disturbances. The obtained results show how the genetic algorithm is able to find optimal solutions and the proper coefficients values.

   Software Routine for Automatic Fine-Tuning of the Rectifier Synchronization to AC Line Voltages
By Nikolic A.B., Jeftenic B.I. [View]
[Download]

Abstract: A new software routine for automatic fine-tuning of the rectifier synchronization to AC line voltages is presented. The goal of this work is to create appropriate rectifier synchronization procedure that rely only on software implemented in the microcontroller. A simple electronic circuit used along with the microcontroller for zero crossing detection gives possibility to realize several functions with the same circuit and software, including protection functions. The validity of the proposed software routine was proven by the experimental results.

EPE-PEMC 2000 - Topic 03d: General Section
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 03: Control of Converters > EPE-PEMC 2000 - Topic 03d: General Section
	[return to parent folder]

	Combined Control of Stabilized Impulse DC-Voltage Converters By Sokol E.I., Goncharov Y.P., Kipensky A.V., Harisi H.	[View] [Download]
Abstract: Different variations of structures of combined control systems of impulse converters of DC-voltage (ICDCV) have been analyzed in this work. Unique systems have been proposed, which provide invariantness of output voltage of (ICDCV) to charges of its input voltage. Besides, the influence of several factors, coming from real parameters of power switches, on quality of regulation of output voltage of (ICDCV) has been considered and the systems have been proposed, which compensate the influence of those factors.

	Control of a Reversible AC/DC Voltage Converter Based on Input-Output Linearization without Load Current Sensor By Marques G.D.	[View] [Download]
Abstract: This paper presents a modified control system for voltage type PWM AC to DC converters based on Input-Output linearization. This system is based on the direct control of two quantities: the DC capacitor voltage, via the direct current and reactive power. Two hysteresis current controllers in rotating frame co-ordinates are used as the inner loop. The method can be used also with other current controllers. An outer non-linear controller based on the input-output linearization sets the direct reference current. The synthesis of the DC voltage controller is done using some approximations. The control system presents high performances and is useful for inverter or rectifier operations. The major drawback, compared with other methods, is the need of a load current sensor. To solve this drawback a modified control system is presented in this paper. The load current is obtained using the DC current of the converter that can be easily obtained with the AC currents, the switching states of the semiconductor devices and the reference current of the capacitors.

	Controller Design for Auxiliary Resonant Commutated Pole Matrix Converter By Teichmann R., Oyama J., Yamada E.*	[View] [Download]
Abstract: The advantages and disadvantages of a soft switching matrix converter are discussed. A control scheme for the resonant commutations with minimum sensing effort is presented. The underlying mathematical basis is introduced. An experimental set-up representing a 6kW soft switching matrix converter is shown. Practical implementation issues with state-of-the-art control and device technology are discussed.

	Direct Self Control with Minimum Torque Ripple and High Dynamics for a Double Three-Level GTO Inverter Drive By Janssen M., Steimel A.	[View] [Download]
Abstract: A highly dynamic control scheme with very low torque ripple - Direct Self Control with torque hysteresis control - for very high power medium voltage induction motor drives fed by a double three-level inverter is presented. The machine and inverter control are explained and the proposed torque quality and dynamic are verified by measurements at a 180 kW lab drive.

	Extended Kalman Filter Based Speed Sensorless AC Motor Control By Fodor D., Vass J., Juhász Zs., Bíró K. A.	[View] [Download]
Abstract: The paper describes a method for speed sensorless control of an AC motor. Properly the extended Kalman filter is used for estimating the speed. The EKFT algorithm and its adaptation to the motor model are described by rigorous mathematical representation and they were realised in MATLAB Simulink. The simulation results show good dynamic behaviour suitable for DSP implementation.

	Hysteresis Current Regulation in IGBT Line Converter By Perelmuter V.	[View] [Download]
Abstract: Line converter input current regulation in the rotating reference frame with using of the methods, that are inherent in the direct torque control, is investigated. The analytical relations are received for computation of the system main characteristics. The simulation, that illustrates an operation of the proposed system, and its comparison with the other known schemes are presented.

	Load Compensated Non-Linear Voltage Control of a Boost Type Rectifier By Blasco-Giménez R., Peña R., Cárdenas R., Cartes J.*	[View] [Download]
Abstract: This paper deals with the control of a three-phase Voltage-source current-regulated boost type PWM rectifier. The control scheme uses a synchronously rotating reference frame to control the input current on the rectifier. Given the non-linear nature of the DC link voltage dynamics, The square of the DC link voltage is defined as the controlled variable, to cancel the non-linear nature of the DC link voltage dynamics. Additionally, feed-forward or load compensation is used to overcome the time varying load and improve the transient response of the voltage control loop. The voltage controller and the feed-forward compensation set the reference d-axis current demand to balance the active power. The system including the vector control of the current control loops, the PWM strategy, the DC link voltage controller and the rectifier modelling has been simulated and an experimental rig has been set up to validate the control approach.

	Power Regulation and DC-Link Neutral Point Voltage Balance Control of Three-Level VSI Using a LQR-Based Gain-Scheduling Technique By Alepuz S., Bordonau J., Peracaula J.	[View] [Download]
Abstract: A simple and effective method to design the control strategy for a Three-Level VSI is introduced. Linear Quadratic Regulator (LQR) and Gain-Scheduling techniques work concurrently in the regulator. Any state variable can be regulated using the proposed method, either in small and large-signal operation. With the model and regulator presented, DC-link unbalance regulation is also achieved by means of the controller action. Then, a switching strategy to control DC-link neutral point voltage is not required. Simulation results verify the validity of the proposed controller design.

	Sliding Mode Control Parameters Optimization Using Genetics Algorithms By Matas J., García de Vicuna L., López O., Castilla M., López M.	[View] [Download]
Abstract: A Genetic Algorithm to optimize the parameters of the sliding mode controllers for boost and buck-boost converters and for a modular power system is proposed. The algorithm is based on a performance index, which evaluates the converter transient response in order to optimize the following parameters: fast transient response, absence of steady-state errors in the output voltage, and robust output voltage responses against load disturbances. The obtained results show how the genetic algorithm is able to find optimal solutions and the proper coefficients values.

	Software Routine for Automatic Fine-Tuning of the Rectifier Synchronization to AC Line Voltages By Nikolic A.B., Jeftenic B.I.	[View] [Download]
Abstract: A new software routine for automatic fine-tuning of the rectifier synchronization to AC line voltages is presented. The goal of this work is to create appropriate rectifier synchronization procedure that rely only on software implemented in the microcontroller. A simple electronic circuit used along with the microcontroller for zero crossing detection gives possibility to realize several functions with the same circuit and software, including protection functions. The validity of the proposed software routine was proven by the experimental results.