EPE Association: EPE-PEMC 2004 - Topic 04-2: Measurements techniques

EPE-PEMC 2004 - Topic 04-2: Measurements techniques
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 04: MEASUREMENTS AND SENSORS > EPE-PEMC 2004 - Topic 04-2: Measurements techniques

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   A Novel Approach To Speed Measurement For Incremental Encoders Featuring High Accuracy And Bandwidth
By Luigi Di Cintio, Francesco Parasiliti, Roberto Petrella, Marco Tursini [View]
[Download]

Abstract: In this paper an optimised speed measurement method for incremental encoders is presented and fully analysed. The algorithm is based on a novel mixed time and frequency measurement of the encoder signals. Very high dynamic performance and accuracy are guaranteed in all the operating conditions The iterative formulation of the algorithm and the limited hardware requirements allows its implementation by means of a standard microcontroller (i.e. TMS 320F243).

   Adaptive Distance Measuring Unit Of Phase-To-Ground Fault Protection
By E. Vanzovichs, R. Koemecs [View]
[Download]

Abstract: Microprocessor distance measuring units with adaptive tripping characteristic upper boundary to load conditions are developed in this article. The analysis of the impedance measured during the phase-to-ground faults is carried out and mathematical functions for upper line of tripping characteristic are obtained. The experimental comparison of adaptive and static characteristics on the basis of numerical experiment was carried out (Monte-Carlo method). The results show that functioning effectiveness of distance measuring units with the adaptive characteristics is higher than with static ones.

   Broken Rotor Bars Detection In Induction Machines Using A Variable Structure Observer And Kalman Filtering
By Eltabach Mario, Charara Ali [View]
[Download]

Abstract: One of the most important issues when implementing control and fault diagnosis systems for induction motor drives is obtaining accurate information about the state of certain motor electromagnetic signals such as stator flux and electromagnetic torque. This paper examines the detection of rotor imperfections through spectral analysis of the electromagnetic torque, computed by two stator flux estimators, and using only noninvasive sensors such as current and voltage sensors. In a first approach the variable structure observer is used to estimate stator flux components without sensing or estimating the velocity of rotation. The second approach uses an extended Kalman filter (EKF) to estimate flux components and velocity. A comparison of experimental results demonstrates the significant potential of these methods in detecting these types of faults.

   Cardiograms Digital Registration And Analysis.
By Jury Kolodnickis, Zigurds Markovichs [View]
[Download]

Abstract: Electrocardiograph is used to register hearts electronic impulses and record them as electrocardiograms EKG. Use of digital electrocardiograph raises mobility and accuracy of the received information and simplifies its storage and processing. By using multiple programs for data storage, information exchange problem between programs occurs. To resolve this problem additional program was developed, which writes information from one program to another.

   Determination Of Dielectric Permeability Of Object With Non-Destructive Testing Method And Compensation Correction Data Processing Algorithm
By I. Matiss, A. Purvinsh [View]
[Download]

Abstract: Capacitive Non-Destructive Testing (NDT) technique and Calibrated Noise Factor (CNF) method are used to determine the dielectric permeability (DP) of one-sided access material with excluding influence of the noise factor – thickness of gap between the transducer and material. The essence of CNF and sequence of operations for the calibration experiment are explained. The mathematical modelling experiment is applied for estimation of accuracy of data processing algorithm used for compensation of influence of the noise factor. The three-layer media (media - material - media) inserted in the active area of the unilateral capacitive sensor is used as a model.

   Develop Of A Flicker Meter Based On A Digital Signals Processor
By Jair Aguado Quintero, Henry Maya, Andrea Aguilar Ospina [View]
[Download]

Abstract: This paper described the application the Digital Signal Processing (DSP) of Flickermeter UIE/IEC development. Initially it is revised the functional and basic aspects of the project, the impact of the use of the frequency of 60 Hz is analyzed in the norm. For the proposed development it is appealed to the program MATLAB, which has one of a solid mathematical platform for the development of these applications and it is appealed to the development system Code Composer Studio for the family of DSP TMS320LF2407 of TI.

   Generation Of High Frequency - Low Distortion Sinusoidal Voltage, For Magnetic Coil Measurements, Using A Current Fed Resonant Converter
By G. S. Dimitrakakis, E. C. Tatakis [View]
[Download]

Abstract: For the determination of the electrical properties of magnetic coils used in power electronics applications, it is necessary to make loss measurements and often acquire hysteresis loops under clearly sinusoidal voltage excitation conditions. The operation of a current fed resonant converter used for this purpose is analyzed in details and its control circuit is presented. The factors that limit its performance are investigated in order to achieve a future, improved design.

   Measuring The Switching Delays Of Power Switches In Pwm Inverters
By Mika Ikonen, Kimmo Rauma, Pertti Silventoinen, Olli Pyrhoenen [View]
[Download]

Abstract: Three different circuits for sensing switching delays of power switches in inverter are introduced. Proposed circuits are tested and the results are shown. Information about delays is needed to compensate errors in output voltages that are due to blanking time inserted between switchings. Proposed circuits are based on comparator logic.

   The Coaxial Transformer With Sectional Outer Winding - Design And Basic Properties
By Boguslaw Grzesik, Mariusz Stepien [View]
[Download]

Abstract: The paper describes design and basic properties of high frequency high coupled coaxial transformer – CHC – with sectional winding and magnetic core. The windings of transformer are coaxially arranged. Two types of transformer windings are investigated. The first type is the inner winding of transformer as solid pipe while the outer one consists of split pipe. Each section of split pipe is twisted around pipe circumference and the end of first turn is beginning of the next one. The second type of the transformer consists of split inner winding while outer one is also split or is a solid pipe. The resulting properties of transformer are compared with properties of spiral CHC coaxial transformer (where windings are solid pipes). The nanotechnology is needed to manufacturing of the transformer. The transformer has very good coupling between windings, low leakage inductance, high efficiency, above 98%, and very high power density, above 100 kW/kg at 1MHz of frequency. The analysis of transformer has been carried out using ANSYS software based on FEM.

EPE-PEMC 2004 - Topic 04-2: Measurements techniques
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 04: MEASUREMENTS AND SENSORS > EPE-PEMC 2004 - Topic 04-2: Measurements techniques
	[return to parent folder]

	A Novel Approach To Speed Measurement For Incremental Encoders Featuring High Accuracy And Bandwidth By Luigi Di Cintio, Francesco Parasiliti, Roberto Petrella, Marco Tursini	[View] [Download]
Abstract: In this paper an optimised speed measurement method for incremental encoders is presented and fully analysed. The algorithm is based on a novel mixed time and frequency measurement of the encoder signals. Very high dynamic performance and accuracy are guaranteed in all the operating conditions The iterative formulation of the algorithm and the limited hardware requirements allows its implementation by means of a standard microcontroller (i.e. TMS 320F243).

	Adaptive Distance Measuring Unit Of Phase-To-Ground Fault Protection By E. Vanzovichs, R. Koemecs	[View] [Download]
Abstract: Microprocessor distance measuring units with adaptive tripping characteristic upper boundary to load conditions are developed in this article. The analysis of the impedance measured during the phase-to-ground faults is carried out and mathematical functions for upper line of tripping characteristic are obtained. The experimental comparison of adaptive and static characteristics on the basis of numerical experiment was carried out (Monte-Carlo method). The results show that functioning effectiveness of distance measuring units with the adaptive characteristics is higher than with static ones.

	Broken Rotor Bars Detection In Induction Machines Using A Variable Structure Observer And Kalman Filtering By Eltabach Mario, Charara Ali	[View] [Download]
Abstract: One of the most important issues when implementing control and fault diagnosis systems for induction motor drives is obtaining accurate information about the state of certain motor electromagnetic signals such as stator flux and electromagnetic torque. This paper examines the detection of rotor imperfections through spectral analysis of the electromagnetic torque, computed by two stator flux estimators, and using only noninvasive sensors such as current and voltage sensors. In a first approach the variable structure observer is used to estimate stator flux components without sensing or estimating the velocity of rotation. The second approach uses an extended Kalman filter (EKF) to estimate flux components and velocity. A comparison of experimental results demonstrates the significant potential of these methods in detecting these types of faults.

	Cardiograms Digital Registration And Analysis. By Jury Kolodnickis, Zigurds Markovichs	[View] [Download]
Abstract: Electrocardiograph is used to register hearts electronic impulses and record them as electrocardiograms EKG. Use of digital electrocardiograph raises mobility and accuracy of the received information and simplifies its storage and processing. By using multiple programs for data storage, information exchange problem between programs occurs. To resolve this problem additional program was developed, which writes information from one program to another.

	Determination Of Dielectric Permeability Of Object With Non-Destructive Testing Method And Compensation Correction Data Processing Algorithm By I. Matiss, A. Purvinsh	[View] [Download]
Abstract: Capacitive Non-Destructive Testing (NDT) technique and Calibrated Noise Factor (CNF) method are used to determine the dielectric permeability (DP) of one-sided access material with excluding influence of the noise factor – thickness of gap between the transducer and material. The essence of CNF and sequence of operations for the calibration experiment are explained. The mathematical modelling experiment is applied for estimation of accuracy of data processing algorithm used for compensation of influence of the noise factor. The three-layer media (media - material - media) inserted in the active area of the unilateral capacitive sensor is used as a model.

	Develop Of A Flicker Meter Based On A Digital Signals Processor By Jair Aguado Quintero, Henry Maya, Andrea Aguilar Ospina	[View] [Download]
Abstract: This paper described the application the Digital Signal Processing (DSP) of Flickermeter UIE/IEC development. Initially it is revised the functional and basic aspects of the project, the impact of the use of the frequency of 60 Hz is analyzed in the norm. For the proposed development it is appealed to the program MATLAB, which has one of a solid mathematical platform for the development of these applications and it is appealed to the development system Code Composer Studio for the family of DSP TMS320LF2407 of TI.

	Generation Of High Frequency - Low Distortion Sinusoidal Voltage, For Magnetic Coil Measurements, Using A Current Fed Resonant Converter By G. S. Dimitrakakis, E. C. Tatakis	[View] [Download]
Abstract: For the determination of the electrical properties of magnetic coils used in power electronics applications, it is necessary to make loss measurements and often acquire hysteresis loops under clearly sinusoidal voltage excitation conditions. The operation of a current fed resonant converter used for this purpose is analyzed in details and its control circuit is presented. The factors that limit its performance are investigated in order to achieve a future, improved design.

	Measuring The Switching Delays Of Power Switches In Pwm Inverters By Mika Ikonen, Kimmo Rauma, Pertti Silventoinen, Olli Pyrhoenen	[View] [Download]
Abstract: Three different circuits for sensing switching delays of power switches in inverter are introduced. Proposed circuits are tested and the results are shown. Information about delays is needed to compensate errors in output voltages that are due to blanking time inserted between switchings. Proposed circuits are based on comparator logic.

	The Coaxial Transformer With Sectional Outer Winding - Design And Basic Properties By Boguslaw Grzesik, Mariusz Stepien	[View] [Download]
Abstract: The paper describes design and basic properties of high frequency high coupled coaxial transformer – CHC – with sectional winding and magnetic core. The windings of transformer are coaxially arranged. Two types of transformer windings are investigated. The first type is the inner winding of transformer as solid pipe while the outer one consists of split pipe. Each section of split pipe is twisted around pipe circumference and the end of first turn is beginning of the next one. The second type of the transformer consists of split inner winding while outer one is also split or is a solid pipe. The resulting properties of transformer are compared with properties of spiral CHC coaxial transformer (where windings are solid pipes). The nanotechnology is needed to manufacturing of the transformer. The transformer has very good coupling between windings, low leakage inductance, high efficiency, above 98%, and very high power density, above 100 kW/kg at 1MHz of frequency. The analysis of transformer has been carried out using ANSYS software based on FEM.