EPE Association: EPE 2018 - DS3e: Estimation and Identification Methods; Computational Intelligence in Control Systems

EPE 2018 - DS3e: Estimation and Identification Methods; Computational Intelligence in Control Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2018 ECCE Europe - Conference > EPE 2018 - Topic 03: Measurement and Control > EPE 2018 - DS3e: Estimation and Identification Methods; Computational Intelligence in Control Systems

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   A Simple Determination of the Error Voltage Compensation Map for Motor Parameter Identification
By Tobias SCHEU [View]
[Download]

Abstract: This paper proposes a new method for determining the error voltage compensation map in a parameter identification procedure of three-phase induction motors with an inverter. The compensation curve depending on the motor current is determined using a simple procedure based on given reference voltage steps and the corresponding steady state values of the stator current of the induction motor.

   ALGORITHM FOR IMMUNE NEURAL NETWORK IN TRANSPORT COLLISION PREVENTION CONTROL SYSTEM OF UNMANNED ELECTRICAL VEHICLE
By Anna BEINAROVICA [View]
[Download]

Abstract: In this paper authors propose the algorithm for immune neural network (INN) to prevent collisions of unmanned electric transport units. To avoid collision the proposed algorithm use in INN memory stored data about previously successfully prevented collision situations as a base for similar current situation solution.

   Application of linear functional observers for the thermal estimation in power modules
By Imane SAKHRAOUI [View]
[Download]

Abstract: High integrated power electronic modules are more and more designed with the emergence of new semiconductor technologies. Thus, increase of reliability of power modules induces the precise knowledge of the local temperature, even if it can not be measured at any location. In this paper, the application of anobserver is proposed. It allows to estimate the temperature at any location using measurements providedfrom thermal sensors located at a few precise points. The aim is to design a reduced size observer thatcould be implemented on a real-time embedded target such as Digital Signal Processor. Consequently, itis necessary to obtained a minimal order observer to limit the computation complexity.

   Balancing of a Rotor With Active Magnetic Bearing System: Comparison of One- and Two-Plane Balancing Procedures
By Jouni VUOJOLAINEN [View]
[Download]

Abstract: Rotor balancing is a procedure used to reduce the unbalance vibration of rotating machinery. Unbalancevibration creates forces to the bearings and causes harmful effects such as reducing their lifespan. Unbalance is caused simply because of the difference of the rotors axis of inertia and the rotating axis. In this paper, two balancing techniques are presented to reduce the unbalance vibration: one-plane balancing procedure used for two-plane balancing and a two-plane balancing procedure. Both balancing procedures take into account the cross effect between the planes. Rotor levitated with active magnetic bearings is balanced. Magnetic levitation is unstable so the xy-position of the rotor is measured on both rotor ends for the control purposes. The unbalance vibrations are analyzed from these position measurements so no additional hardware is required for the rotor balancing. Results are presented from a simulation model of an active magnetic bearing system. Comparison of the one-plane and two-plane balancing is provided.

   Comparison of Adaptive Fuzzy PID and ANFIS Controllers for Precision Positioning of Complex Object with Nonlinear Disturbance - Study and Experiment
By Galina DEMIDOVA [View]
[Download]

Abstract: The paper considers two methods for obtaining a robust positioning system with acting internal and external disturbances and changing of control object's parameters during operation - using an Adaptive Fuzzy-PID Controller and an Adaptive Neuro-Fuzzy Inference System (ANFIS) controller. Stages of synthesis of these controllers are given; their advantages and disadvantages are listed. It's shown simulation and experimental results.

   Diagnostics of low-voltage power cables by frequency-response analysis of power-line communication channel
By Anton POLUEKTOV [View]
[Download]

Abstract: Low-voltage cabling will be in important role in the future smart grids as well as in industry applications, e.g. variable-speed drives. Hence, on-line diagnosis of cable condition and prognosis of the remaining life-time are essential functions. In this paper, a cable diagnosis method based on a power-line communication channel frequency-response analysis is presented and evaluated with laboratory tests.

   Limits of SiC MOSFETs' Parameter Deviations for Safe Parallel Operation
By Teresa BERTELSHOFER [View]
[Download]

Abstract: This paper presents a numerical method combined with a device simulation model used to analyse the parallel connection of several SiC MOSFET dies. Parallel connection is necessary to achieve the desired current carrying capability of main inverters for xEV-drives. With this method, the effect of asymmetries within the chips' on-state resistance coupled with asymmetries in the threshold voltage is investigated.The investigation result quantifies, to what extent the threshold voltage and the on-state resistance of the chips can vary at the same time, when the output power of the inverter should only be derated by 5\% at most and no single chip in the inverter should be overheated. To achieve this derating limit, the impact of the positive temperature coefficient (PTC) of the output characteristic and the thermal coupling between the paralleled chips is examined.

   Sensorless current and speed control of a PMSM driven with a Delta-Sigma-PWM
By Axel KLEIN [View]
[Download]

Abstract: In this paper two novel methods for sensorless angle detection, implemented in delta sigma signal processing, are shown. They are both based on an estimation of the electromagnetic force (EMF) in combination with a phase locked loop. The advantage of these combinations, unlike the common implementation with the arctangent function, is the possibility to perform the calculations in DSSP with a sampling rate of 10MHz. Thus the input signals are DS bit-streams, which even are intermediate results in the control system and the observed angle is updated with 10MHz. One sensorless angle detection method is based on the set voltage output by a proportional phase current controller, the other is based on the current control error. The experiments result in fast locking times (80 ms and 180 ms from stand still) and an average angle accuracy of 0:2° and 0:6°. In both performance indicators the angle detection based on the current control error shows better performance.

   Thermal Characterization of Multichip Power Module
By Fernando GONZÁLEZ [View]
[Download]

Abstract: As a recognized stressor of power semiconductors modules, thermal concerns are one of the major issues related to these devices, and the raise of power density of these modules increases this fact. This makes thermal models to gain in relevance, with higher accuracy and complexity requirements, in order to be able to foresee thermal failures. This article analyzes the thermal behaviour of a multichip power module, considering the heating of the devices and the influence of power losses on the integrated Negative Temperature Coefficient (NTC) thermistor. A complete thermal model considering all the chips in the module is proposed, including the thermal cross-coupling between devices. This is completed with a dynamic model to asses the temperature variations in the NTC based on the losses generated in each device. This way, an estimation principle is proposed for the online detection of abnormal behaviours inside the module.

EPE 2018 - DS3e: Estimation and Identification Methods; Computational Intelligence in Control Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2018 ECCE Europe - Conference > EPE 2018 - Topic 03: Measurement and Control > EPE 2018 - DS3e: Estimation and Identification Methods; Computational Intelligence in Control Systems
	[return to parent folder]

	A Simple Determination of the Error Voltage Compensation Map for Motor Parameter Identification By Tobias SCHEU	[View] [Download]
Abstract: This paper proposes a new method for determining the error voltage compensation map in a parameter identification procedure of three-phase induction motors with an inverter. The compensation curve depending on the motor current is determined using a simple procedure based on given reference voltage steps and the corresponding steady state values of the stator current of the induction motor.

	ALGORITHM FOR IMMUNE NEURAL NETWORK IN TRANSPORT COLLISION PREVENTION CONTROL SYSTEM OF UNMANNED ELECTRICAL VEHICLE By Anna BEINAROVICA	[View] [Download]
Abstract: In this paper authors propose the algorithm for immune neural network (INN) to prevent collisions of unmanned electric transport units. To avoid collision the proposed algorithm use in INN memory stored data about previously successfully prevented collision situations as a base for similar current situation solution.

	Application of linear functional observers for the thermal estimation in power modules By Imane SAKHRAOUI	[View] [Download]
Abstract: High integrated power electronic modules are more and more designed with the emergence of new semiconductor technologies. Thus, increase of reliability of power modules induces the precise knowledge of the local temperature, even if it can not be measured at any location. In this paper, the application of anobserver is proposed. It allows to estimate the temperature at any location using measurements providedfrom thermal sensors located at a few precise points. The aim is to design a reduced size observer thatcould be implemented on a real-time embedded target such as Digital Signal Processor. Consequently, itis necessary to obtained a minimal order observer to limit the computation complexity.

	Balancing of a Rotor With Active Magnetic Bearing System: Comparison of One- and Two-Plane Balancing Procedures By Jouni VUOJOLAINEN	[View] [Download]
Abstract: Rotor balancing is a procedure used to reduce the unbalance vibration of rotating machinery. Unbalancevibration creates forces to the bearings and causes harmful effects such as reducing their lifespan. Unbalance is caused simply because of the difference of the rotors axis of inertia and the rotating axis. In this paper, two balancing techniques are presented to reduce the unbalance vibration: one-plane balancing procedure used for two-plane balancing and a two-plane balancing procedure. Both balancing procedures take into account the cross effect between the planes. Rotor levitated with active magnetic bearings is balanced. Magnetic levitation is unstable so the xy-position of the rotor is measured on both rotor ends for the control purposes. The unbalance vibrations are analyzed from these position measurements so no additional hardware is required for the rotor balancing. Results are presented from a simulation model of an active magnetic bearing system. Comparison of the one-plane and two-plane balancing is provided.

	Comparison of Adaptive Fuzzy PID and ANFIS Controllers for Precision Positioning of Complex Object with Nonlinear Disturbance - Study and Experiment By Galina DEMIDOVA	[View] [Download]
Abstract: The paper considers two methods for obtaining a robust positioning system with acting internal and external disturbances and changing of control object's parameters during operation - using an Adaptive Fuzzy-PID Controller and an Adaptive Neuro-Fuzzy Inference System (ANFIS) controller. Stages of synthesis of these controllers are given; their advantages and disadvantages are listed. It's shown simulation and experimental results.

	Diagnostics of low-voltage power cables by frequency-response analysis of power-line communication channel By Anton POLUEKTOV	[View] [Download]
Abstract: Low-voltage cabling will be in important role in the future smart grids as well as in industry applications, e.g. variable-speed drives. Hence, on-line diagnosis of cable condition and prognosis of the remaining life-time are essential functions. In this paper, a cable diagnosis method based on a power-line communication channel frequency-response analysis is presented and evaluated with laboratory tests.

	Limits of SiC MOSFETs' Parameter Deviations for Safe Parallel Operation By Teresa BERTELSHOFER	[View] [Download]
Abstract: This paper presents a numerical method combined with a device simulation model used to analyse the parallel connection of several SiC MOSFET dies. Parallel connection is necessary to achieve the desired current carrying capability of main inverters for xEV-drives. With this method, the effect of asymmetries within the chips' on-state resistance coupled with asymmetries in the threshold voltage is investigated.The investigation result quantifies, to what extent the threshold voltage and the on-state resistance of the chips can vary at the same time, when the output power of the inverter should only be derated by 5\% at most and no single chip in the inverter should be overheated. To achieve this derating limit, the impact of the positive temperature coefficient (PTC) of the output characteristic and the thermal coupling between the paralleled chips is examined.

	Sensorless current and speed control of a PMSM driven with a Delta-Sigma-PWM By Axel KLEIN	[View] [Download]
Abstract: In this paper two novel methods for sensorless angle detection, implemented in delta sigma signal processing, are shown. They are both based on an estimation of the electromagnetic force (EMF) in combination with a phase locked loop. The advantage of these combinations, unlike the common implementation with the arctangent function, is the possibility to perform the calculations in DSSP with a sampling rate of 10MHz. Thus the input signals are DS bit-streams, which even are intermediate results in the control system and the observed angle is updated with 10MHz. One sensorless angle detection method is based on the set voltage output by a proportional phase current controller, the other is based on the current control error. The experiments result in fast locking times (80 ms and 180 ms from stand still) and an average angle accuracy of 0:2° and 0:6°. In both performance indicators the angle detection based on the current control error shows better performance.

	Thermal Characterization of Multichip Power Module By Fernando GONZÁLEZ	[View] [Download]
Abstract: As a recognized stressor of power semiconductors modules, thermal concerns are one of the major issues related to these devices, and the raise of power density of these modules increases this fact. This makes thermal models to gain in relevance, with higher accuracy and complexity requirements, in order to be able to foresee thermal failures. This article analyzes the thermal behaviour of a multichip power module, considering the heating of the devices and the influence of power losses on the integrated Negative Temperature Coefficient (NTC) thermistor. A complete thermal model considering all the chips in the module is proposed, including the thermal cross-coupling between devices. This is completed with a dynamic model to asses the temperature variations in the NTC based on the losses generated in each device. This way, an estimation principle is proposed for the online detection of abnormal behaviours inside the module.