EPE Association: EPE 2017 - DS3i: Adjustable speed drives II

EPE 2017 - DS3i: Adjustable speed drives II
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - DS3i: Adjustable speed drives II

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   Achieving High-Performance Electrified Actuation System with Integrated Motor Drive and Wide Bandgap Power Electronics
By WOONGKUL LEE [View]
[Download]

Abstract: An integration of an electric motor and a drive with wide bandgap (WBG) devices possesses numerousattractive features for electrified and decentralized actuation systems. The WBG devices are capable ofoperating at high junction temperature (>170 °C) with improved efficiency due to fast switching speedand low on-state resistance. It also leads to better performance and higher power density electrohydrostaticactuators than the traditional solutions, which are being widely adopted in industrialapplications such as aerospace, robotics, automobiles, manufacturing, wind turbine, and off-roadvehicles. This paper introduces and investigates the benefits of the integrated motor drive (IMD) withthe WBG-based power electronics for the electro-hydrostatic actuation systems.

   Compensation of Loading Effects in Saliency based Position Estimation of Induction Machines using PWM-Induced Transient Excitation
By Walter FAHRNER [View]
[Download]

Abstract: This study deals with two main problems of sensorless control at zero stator frequency. By using a transient voltage excitation to exploit inherent machine saliencies, the time derivative of current must be estimated. The initial transient oscillation of the current slope prohibits to estimate the derivative from small signal durations. Therefore, the first part of this study presents a new robust and fast estimation algorithm which is capable to estimate the current derivation from short signal durations also containing the initial transient oscillation part. This proposed algorithm uses a fast Fourier transformation followed by a linear transformation. Moreover, a comparison of the proposed algorithm with the commonly used derivation estimation technique linear regression was conducted. The comparison was made for different signal durations and sampling rates. Whereby the proposed algorithm shows quite better results than the linear regression. The second part of this paper presents a new compensation technique for the application of sensorless control in combination with induction machines. A frequently used sensorless control technique in this specific combination is tracking of rotor slots, consequently the current modulation due to the rotor slots must be dominant. However, all other modulation effects appear as disturbances and have to compensated. Especially for high torque ranges the modulation caused by saturation becomes significant. The new compensation technique described in this study is capable to separate all disturbing modulations from the modulation caused by rotor slotting without any spectral analyses. Secondly the identified disturbing modulations were subtracted. As a result, the modulation due to rotor slotting becomes dominant.

   Design of a Novel Integrated Motor-Compressor Machine with GaN-Based Inverters
By HAO DING [View]
[Download]

Abstract: The objective of this paper is to analyze a novel high-speed integrated motor-compressor drive system and investigate the opportunities by using gallium nitride (GaN)-based inverters. The proposed integrated motor-compressor is a combination of electric machine and axial-flow compressor by shaping the rotor pole of the electric machine into airfoils. Hence, the proposed integrated motor-compressor can provide electromagnetic torque and compression function at the same time. As the integrated machine needs to rotate at high speed to achieve high compression ratio, the challenges of high fundamental frequency are addressed. By leveraging GaN-based inverters, the current harmonics distortion is reduced, and high efficiency is maintained at the high-speed operating condition. In this design, a GaN-based inverter is proposed for driving an integrated motor-compressor rotating at 35000 rpm. The electromagnetic performance of the proposed integrated machine is investigated by analytical equations and finite element analysis (FEA). The characteristic parameters, current total harmonic distortion, and the efficiency of the GaN-based inverter are compared with the Si-based inverter.

   Finite set model predictive speed control of induction motor
By Karol WRÓBEL [View]
[Download]

Abstract: In this work is presented predictive speed controller for induction motor. It is proposed to divide thecontrol process into two parts: coarse adjustment and regulation in the area of steady state. This allowsto reduce the pulsations in obtained waveforms in steady state.

   Influence of Parameters Identification Errors on the Stability Boundaries of the Modified MRASCC Speed Estimator of the Induction Motor Drive
By Mateusz KORZONEK [View]
[Download]

Abstract: In this paper the induction motor state estimator based on current MRAS-type concept with a modified speed adaptation algorithm is presented. Its stability in motoring and regenerating modes is analysed. The influence of motor parameter mismatch to the stability boundaries is presented. It is shown that one of the proposed modification methods of the adaptation algorithm makes the estimator stable under regenerating mode even under the motor parameters changes.

   On-line Temperature Monitoring of Power Modules in AC Drives
By ILYIN MIKHAIL [View]
[Download]

Abstract: This paper addresses the development of electro-thermal models able to accurately predict the thermalbehaviour of power modules in AC drives. The model would be implemented in the digital signalprocessor used to control the drive, operating therefore on line. FEM will be used for the design andcalibration of the models. The performance of the proposed methods will be validated experimentally.

   Sensorless control of PMSM fed by a matrix converter
By Konrad URBANSKI [View]
[Download]

Abstract: The paper presents the results of studies for the sensorless drive with a permanent magnet synchronous motor, which is supplied by the matrix converter, and for comparison, is supplied by the voltage source inverter. For accurate simulation, inverter models using the SimPowerSystems library of Matlab/Simulink environment have been prepared.

EPE 2017 - DS3i: Adjustable speed drives II
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - DS3i: Adjustable speed drives II
	[return to parent folder]

	Achieving High-Performance Electrified Actuation System with Integrated Motor Drive and Wide Bandgap Power Electronics By WOONGKUL LEE	[View] [Download]
Abstract: An integration of an electric motor and a drive with wide bandgap (WBG) devices possesses numerousattractive features for electrified and decentralized actuation systems. The WBG devices are capable ofoperating at high junction temperature (>170 °C) with improved efficiency due to fast switching speedand low on-state resistance. It also leads to better performance and higher power density electrohydrostaticactuators than the traditional solutions, which are being widely adopted in industrialapplications such as aerospace, robotics, automobiles, manufacturing, wind turbine, and off-roadvehicles. This paper introduces and investigates the benefits of the integrated motor drive (IMD) withthe WBG-based power electronics for the electro-hydrostatic actuation systems.

	Compensation of Loading Effects in Saliency based Position Estimation of Induction Machines using PWM-Induced Transient Excitation By Walter FAHRNER	[View] [Download]
Abstract: This study deals with two main problems of sensorless control at zero stator frequency. By using a transient voltage excitation to exploit inherent machine saliencies, the time derivative of current must be estimated. The initial transient oscillation of the current slope prohibits to estimate the derivative from small signal durations. Therefore, the first part of this study presents a new robust and fast estimation algorithm which is capable to estimate the current derivation from short signal durations also containing the initial transient oscillation part. This proposed algorithm uses a fast Fourier transformation followed by a linear transformation. Moreover, a comparison of the proposed algorithm with the commonly used derivation estimation technique linear regression was conducted. The comparison was made for different signal durations and sampling rates. Whereby the proposed algorithm shows quite better results than the linear regression. The second part of this paper presents a new compensation technique for the application of sensorless control in combination with induction machines. A frequently used sensorless control technique in this specific combination is tracking of rotor slots, consequently the current modulation due to the rotor slots must be dominant. However, all other modulation effects appear as disturbances and have to compensated. Especially for high torque ranges the modulation caused by saturation becomes significant. The new compensation technique described in this study is capable to separate all disturbing modulations from the modulation caused by rotor slotting without any spectral analyses. Secondly the identified disturbing modulations were subtracted. As a result, the modulation due to rotor slotting becomes dominant.

	Design of a Novel Integrated Motor-Compressor Machine with GaN-Based Inverters By HAO DING	[View] [Download]
Abstract: The objective of this paper is to analyze a novel high-speed integrated motor-compressor drive system and investigate the opportunities by using gallium nitride (GaN)-based inverters. The proposed integrated motor-compressor is a combination of electric machine and axial-flow compressor by shaping the rotor pole of the electric machine into airfoils. Hence, the proposed integrated motor-compressor can provide electromagnetic torque and compression function at the same time. As the integrated machine needs to rotate at high speed to achieve high compression ratio, the challenges of high fundamental frequency are addressed. By leveraging GaN-based inverters, the current harmonics distortion is reduced, and high efficiency is maintained at the high-speed operating condition. In this design, a GaN-based inverter is proposed for driving an integrated motor-compressor rotating at 35000 rpm. The electromagnetic performance of the proposed integrated machine is investigated by analytical equations and finite element analysis (FEA). The characteristic parameters, current total harmonic distortion, and the efficiency of the GaN-based inverter are compared with the Si-based inverter.

	Finite set model predictive speed control of induction motor By Karol WRÓBEL	[View] [Download]
Abstract: In this work is presented predictive speed controller for induction motor. It is proposed to divide thecontrol process into two parts: coarse adjustment and regulation in the area of steady state. This allowsto reduce the pulsations in obtained waveforms in steady state.

	Influence of Parameters Identification Errors on the Stability Boundaries of the Modified MRASCC Speed Estimator of the Induction Motor Drive By Mateusz KORZONEK	[View] [Download]
Abstract: In this paper the induction motor state estimator based on current MRAS-type concept with a modified speed adaptation algorithm is presented. Its stability in motoring and regenerating modes is analysed. The influence of motor parameter mismatch to the stability boundaries is presented. It is shown that one of the proposed modification methods of the adaptation algorithm makes the estimator stable under regenerating mode even under the motor parameters changes.

	On-line Temperature Monitoring of Power Modules in AC Drives By ILYIN MIKHAIL	[View] [Download]
Abstract: This paper addresses the development of electro-thermal models able to accurately predict the thermalbehaviour of power modules in AC drives. The model would be implemented in the digital signalprocessor used to control the drive, operating therefore on line. FEM will be used for the design andcalibration of the models. The performance of the proposed methods will be validated experimentally.

	Sensorless control of PMSM fed by a matrix converter By Konrad URBANSKI	[View] [Download]
Abstract: The paper presents the results of studies for the sensorless drive with a permanent magnet synchronous motor, which is supplied by the matrix converter, and for comparison, is supplied by the voltage source inverter. For accurate simulation, inverter models using the SimPowerSystems library of Matlab/Simulink environment have been prepared.