The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
I Kallfass - One of the best experts on this subject based on the ideXlab platform.
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a compact 281 319 ghz low power downconverter mmic for Superheterodyne communication receivers
IEEE Transactions on Terahertz Science and Technology, 2021Co-Authors: Christopher M Grotsch, Iulia Dan, Laurenz John, Sandrine Wagner, I KallfassAbstract:This article presents a fully integrated first downconversion stage for a Superheterodyne receiver for high data rate communication at 300 GHz. It comprises a frequency multiplier-by-three, an active dual-gate downconverter, and an LNA. The chip was fabricated in a 35-nm InGaAs-based metamorphic high-electron-mobility transistor technology. The downconverter was designed to be used for different local oscillator (LO) frequencies between 70 and 80 GHz and intermediate frequency (IF) frequencies from 65 to 95 GHz, to create multiple channels for real-time full-duplex communication in the terahertz region. It achieves a conversion gain of 14 dB without IF amplification and 3-dB bandwidth of 25 GHz in the desired upper sideband from 288 to 313 GHz and an estimated NF of 6.6 dB. Without the LNA, the conversion gain of the circuit is $-$ 10 dB and it shows 3-dB bandwidth of 38 GHz in a frequency range from 281 to 319 GHz. Finally, the millimeter-wave monolithic integrated circuit (MMIC) will be compared in detail to a similar state-of-the-art downconverter using a resistive mixer and a necessary additional LO buffer stage in the same technology targeting the identical application. While exhibiting a better conversion gain and bandwidth and occupying only 40% of chip area, the presented downconverter consumes 70% less dc power than the MMIC with a resistive mixer.
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A Superheterodyne 300 GHz wireless link for ultra-fast terahertz communication systems
International Journal of Microwave and Wireless Technologies, 2020Co-Authors: Iulia Dan, G Ducournau, Shintaro Hisatake, Pascal Szriftgiser, Ralfpeter Braun, I KallfassAbstract:A Superheterodyne transmission scheme is adopted and analyzed in a 300 GHz wireless point-to-point link. This was realized using two different intermediate frequency (IF) systems. The first uses fast digital synthesis which provides an IF signal centered around a carrier frequency of 10 GHz. The second involves the usage of commercially available mixers, which work as direct up- and down-converters, to generate the IF input and output. The radio frequency components are based on millimeterwave monolithic integrated circuits at a center frequency of 300 GHz. Transmission experiments over distances up to 10 m are carried out. Data rates of up to 60 Gbps using the first IF option and up to 24 Gbps using the second IF option are achieved. Modulation formats up to 32QAM are successfully transmitted. The linearity of this link and of its components is analyzed in detail. Two local oscillators (LOs), a photonics-based source and a commercially available electronic source are employed and compared. This work validates the concept of Superheterodyne architecture for integration in a beyond-5G network, supplying important guidelines that have to be taken into account in the design steps of a future wireless system.
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A terahertz wireless communication link using a Superheterodyne approach
IEEE Transactions on Terahertz Science and Technology, 2020Co-Authors: Iulia Dan, G Ducournau, Shintaro Hisatake, Pascal Szriftgiser, Ralfpeter Braun, I KallfassAbstract:This article presents a wireless communication point-to-point link operated in the low terahertz (THz) range, at a center frequency of 300 GHz. The link is composed of all-electronic components based on monolithic millimeter wave integrated circuits fabricated in an InGaAs metamorphic high electron mobility transistor technology. Different configurations and architectures are compared and analyzed. The Superheterodyne approach proves to be the most promising of all, being compliant with the new IEEE standard for 100 Gb/s wireless transmissions and showing compatibility to accessible, already available modems. The first option of realizing the Superheterodyne configuration is by combining the 300-GHz transmitter and receiver with of-the-shelf up and down converters operating at a center frequency of 10 GHz. In this case, data rates of up to 24 Gb/s are achieved. The second option employs a fast arbitrary waveform generator that uses a carrier frequency to up-convert the baseband data. In this case, data rates of up to 60 Gb/s and transmission distances of up to 10 m are achieved with complex modulated signals like 16-QAM and 32-QAM. The baseband signal is composed of pseudo-random binary sequences and is analyzed offline using fast analog to digital converters. In Superheterodyne configuration, multichannel transmission is demonstrated. Channel data rates of 10.2 Gb/s using 64-QAM are achieved. The successful transmission of aggregated channels in this configuration shows the potential of THz communication for future high data rate applications.
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a Superheterodyne 300 ghz wireless link for ultra fast terahertz communication systems
European Microwave Conference, 2019Co-Authors: Iulia Dan, G Ducournau, Shintaro Hisatake, Pascal Szriftgiser, Ralfpeter Braun, I KallfassAbstract:This paper presents an all-electronic Superheterodyne wireless system based on millimeterwave monolithic integrated circuits at a center frequency of 300 GHz. Superheterodyne operation is attractive for compliance with the recent IEEE802.15.3d frequency standard. The super-heterodyne transmission is realized, both, with mixers operating at a frequency of 10 GHz, and with an arbitrary waveform generator output centered around 10 GHz. The paper compares both options in terms of error vector magnitude for different baud rates and modulation formats. Data rates of up to 60 Gbps and distances of up to 10 meters are achieved using complex modulated signals like 16-QAM and 32-QAM.
Larry Turner - One of the best experts on this subject based on the ideXlab platform.
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Induction-Motor Rotor Temperature Estimation Using Superheterodyne Receivers
IEEE Transactions on Industry Applications, 2012Co-Authors: Zhi Gao, Roy S. Colby, Larry TurnerAbstract:A rotor temperature estimator is proposed in this paper for grid-connected squirrel-cage induction motors during dynamic or steady-state operations. The method utilizes a pipelined architecture with two Superheterodyne receivers that operate on a common complex current vector input. The first Superheterodyne receiver detects motor speed by extracting an instantaneous rotor-slot-harmonic frequency from the complex current vector. The second Superheterodyne receiver extracts a complex fundamental current vector from the same complex current vector. Given a few known motor parameters and a complex voltage vector, a model-reference adaptive system then produces an estimate of the rotor time constant from the Superheterodyne receivers' outputs. Finally, the rotor temperature is derived from the estimated rotor time constant via a correlation between the rotor temperature and its resistance. Experimental results demonstrate that the proposed method is capable of estimating induction-motor rotor temperature on a sample-by-sample basis without using temperature or speed sensors.
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Induction motor rotor temperature estimation using Superheterodyne receivers
2011 IEEE Energy Conversion Congress and Exposition, 2011Co-Authors: Zhi Gao, Roy S. Colby, Larry TurnerAbstract:A rotor temperature estimator is proposed in this paper for line-connected squirrel-cage induction motors during dynamic or steady-state operations. The method utilizes a pipelined architecture with two Superheterodyne receivers that operate in parallel on a complex current vector. The first Superheterodyne receiver detects motor speed by extracting an instantaneous rotor slot harmonic frequency from the complex current vector. The second Superheterodyne receiver extracts a complex fundamental current vector from the same complex current vector. A model-reference adaptive system then produces an estimate of the rotor time constant from the Superheterodyne receivers' outputs, plus a complex voltage vector and a few motor parameters. Finally, the rotor temperature is derived from the estimated rotor time constant via a correlation between the rotor temperature and its resistance. Experimental results demonstrate that the proposed method is capable of estimating induction motor rotor temperature on a sample-by-sample basis without using temperature or speed sensors.
V V Kulish - One of the best experts on this subject based on the ideXlab platform.
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nonlinear theory of plasma beam Superheterodyne free electron laser of dopplertron type with non axial injection of electron beam
Acta Physica Polonica A, 2014Co-Authors: V V Kulish, A. V. Lysenko, V V Koval, Galyna A Oleksiienko, Yu M RombovskyAbstract:We have developed a quadratic nonlinear theory of a plasma-beam Superheterodyne free electron laser of dopplertron type with the non-axial injection of an electron beam with respect to the guiding magnetic eld. It is found out that the studied device can work in four di erent modes of operation. We determine the modes that have maximum gain coe cients of electromagnetic signals. It is shown that for all the operating modes the ampli cation factor of an electromagnetic signal is enhanced when the electron beam injection angle is increased.
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hierarchic electrodynamics and free electron lasers concepts calculations and practical applications
2011Co-Authors: V V KulishAbstract:Part I: Hierarchical Electrodynamics: Key Concepts, Ideas, and Investigation Methods High-Current Free Electron Lasers as a Historical Relic of the Star Wars Epoch Star Wars Program from Today's Point of View Key Ideas and Potential Design Elements of the Star Wars Program Femtosecond Laser Systems: Basis, Concepts, and Ideas CFEL Systems: Methods for Formation and Application of Electromagnetic Clusters Other Exotic Methods of Formation of Super-Powerful EMPs Elements of the Theory of Hierarchic Dynamic Systems Hierarchy and Hierarchic Dynamic Systems Fundamental Principles in Natural Hierarchic Systems Postulates of the Theory of Hierarchic Systems Hierarchic Trees and the Concept of the System God Hierarchic Description: Basic Ideas and Approaches Hierarchic Oscillations Oscillations as a Universal Physical Phenomenon Hierarchic Oscillations and Hierarchic Trees Relativistic Electron Beam without the Proper Magnetic Field as a Hierarchic Oscillation System Relativistic Electron Beam with the Proper Magnetic Field as a Hierarchic Oscillation System Hierarchic Waves Waves Electron Beam as a Hierarchic Wave System Elementary Mechanisms of Wave Amplification in FELs Hierarchic Description Decompression and Compression Operators: General Case of Lumped Systems Distributed Hierarchic Systems Decompression Operator in the Case of the Van der Pol Method Decompression and Compression Operators in the Case of the Averaging Methods Decompression Operator in the Case of Systems with Slow and Fast Variables Hierarchic Systems with Fast Rotating Phases General Approach Decompression Operator in the Simplest Case of One Scalar Phase Case of Two Fast Rotating Scalar Phases Case of Many Rotating Scalar Phases Method of Averaged Characteristics One Example of the Application of the Method of Averaged Characteristics Electron Oscillations in FEL-Like Electronic Systems Formulation of the Problem Cyclotron Resonances Parametric Resonances: General Case Case of Two Electromagnetic Waves Bounded (Coupled) Parametric Resonance in the Field of Three Electromagnetic Waves Model with Pumping by the Crossed Magnetic and Electric Undulation Fields Hierarchic Oscillations and Waves: The Foundation of the World? Tree of Life: The Ancient Cosmogonic Concept and Method of Investigation Hierarchy, Oscillations, Modern Physics, and the Tree of Life Evolution of the Universe in Terms of the Tree of Life Doctrine Hierarchic Cycles (Oscillations) in Earth Systems Integrity of the Surrounding World as a Totality of Seven-Level Hierarchic Besoms Instead of a Conclusion Part II: High-Current Free Electron Lasers Free Electron Lasers for the Cluster Systems Parametrical Free Electron Lasers: Most General Information Two-Stream Superheterodyne Free Electron Lasers: History and Typical Design Schemes Cluster Klystron SFEL: The Main Design Schemes and Operation Principles Linear High-Current Induction Accelerators Undulation High-Current Induction Accelerators General Description of the FEL Models General FEL Model Formulation of the General FEL Problem Method of Simulating the FEL Pumping Fields Parametrical (Ordinary) Free Electron Lasers: Weak-Signal Theory Self-Consistent Truncated Equations: Simplest Example Kinematical Analysis Amplitude Analysis More General Dopplertron Model: Explosive Instability Arbitrarily Polarized Dopplertron Model: Truncated Equations Arbitrarily Polarized Kinetic Model: Approximation of Given Pumping Field in the Case of Raman Mode Arbitrarily Polarized Kinetic Model: An Approximation of a Given Pumping Field in the Case of the Compton Mode Arbitrarily Polarized Dopplertron Model: Explosive Instability in the Raman Model Explosive Instability in the Linearly Polarized Compton Model Effect of Generation of the Transverse H-Ubitron Field Ordinary (Parametrical) Free Electron Lasers: Cubic-Nonlinear Theory Truncated Equations: Dopplertron Model Truncated Equations: The H-Ubitron Model Effect of Nonlinear Generation of the Longitudinal Electric Field Isochronous Model of a Dopplertron Amplifier Generation of the Additional H-Ubitron Magnetic Field Two-Stream Superheterodyne Free Electron Lasers Two-Stream Instability Ordinary Two-Stream Superheterodyne Free Electron Lasers Project of the Simplest Femtosecond TSFEL Former Plasma-Beam and Parametrical Electron- Wave Superheterodyne FEL Plasma-Beam Superheterodyne Free Electron Lasers: H-Ubitron Model Plasma-Beam Superheterodyne Free Electron Lasers: Dopplertron Model Parametrical Three-Wave Instability in Two- Velocity High-Current Beams Parametrical Electron-Wave Two-Stream Superheterodyne Free Electron Lasers Index
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hierarchic electrodynamics and free electron lasers concepts calculations and practical applications
2011Co-Authors: V V KulishAbstract:Part I: Hierarchical Electrodynamics: Key Concepts, Ideas, and Investigation Methods High-Current Free Electron Lasers as a Historical Relic of the Star Wars Epoch Star Wars Program from Today's Point of View Key Ideas and Potential Design Elements of the Star Wars Program Femtosecond Laser Systems: Basis, Concepts, and Ideas CFEL Systems: Methods for Formation and Application of Electromagnetic Clusters Other Exotic Methods of Formation of Super-Powerful EMPs Elements of the Theory of Hierarchic Dynamic Systems Hierarchy and Hierarchic Dynamic Systems Fundamental Principles in Natural Hierarchic Systems Postulates of the Theory of Hierarchic Systems Hierarchic Trees and the Concept of the System God Hierarchic Description: Basic Ideas and Approaches Hierarchic Oscillations Oscillations as a Universal Physical Phenomenon Hierarchic Oscillations and Hierarchic Trees Relativistic Electron Beam without the Proper Magnetic Field as a Hierarchic Oscillation System Relativistic Electron Beam with the Proper Magnetic Field as a Hierarchic Oscillation System Hierarchic Waves Waves Electron Beam as a Hierarchic Wave System Elementary Mechanisms of Wave Amplification in FELs Hierarchic Description Decompression and Compression Operators: General Case of Lumped Systems Distributed Hierarchic Systems Decompression Operator in the Case of the Van der Pol Method Decompression and Compression Operators in the Case of the Averaging Methods Decompression Operator in the Case of Systems with Slow and Fast Variables Hierarchic Systems with Fast Rotating Phases General Approach Decompression Operator in the Simplest Case of One Scalar Phase Case of Two Fast Rotating Scalar Phases Case of Many Rotating Scalar Phases Method of Averaged Characteristics One Example of the Application of the Method of Averaged Characteristics Electron Oscillations in FEL-Like Electronic Systems Formulation of the Problem Cyclotron Resonances Parametric Resonances: General Case Case of Two Electromagnetic Waves Bounded (Coupled) Parametric Resonance in the Field of Three Electromagnetic Waves Model with Pumping by the Crossed Magnetic and Electric Undulation Fields Hierarchic Oscillations and Waves: The Foundation of the World? Tree of Life: The Ancient Cosmogonic Concept and Method of Investigation Hierarchy, Oscillations, Modern Physics, and the Tree of Life Evolution of the Universe in Terms of the Tree of Life Doctrine Hierarchic Cycles (Oscillations) in Earth Systems Integrity of the Surrounding World as a Totality of Seven-Level Hierarchic Besoms Instead of a Conclusion Part II: High-Current Free Electron Lasers Free Electron Lasers for the Cluster Systems Parametrical Free Electron Lasers: Most General Information Two-Stream Superheterodyne Free Electron Lasers: History and Typical Design Schemes Cluster Klystron SFEL: The Main Design Schemes and Operation Principles Linear High-Current Induction Accelerators Undulation High-Current Induction Accelerators General Description of the FEL Models General FEL Model Formulation of the General FEL Problem Method of Simulating the FEL Pumping Fields Parametrical (Ordinary) Free Electron Lasers: Weak-Signal Theory Self-Consistent Truncated Equations: Simplest Example Kinematical Analysis Amplitude Analysis More General Dopplertron Model: Explosive Instability Arbitrarily Polarized Dopplertron Model: Truncated Equations Arbitrarily Polarized Kinetic Model: Approximation of Given Pumping Field in the Case of Raman Mode Arbitrarily Polarized Kinetic Model: An Approximation of a Given Pumping Field in the Case of the Compton Mode Arbitrarily Polarized Dopplertron Model: Explosive Instability in the Raman Model Explosive Instability in the Linearly Polarized Compton Model Effect of Generation of the Transverse H-Ubitron Field Ordinary (Parametrical) Free Electron Lasers: Cubic-Nonlinear Theory Truncated Equations: Dopplertron Model Truncated Equations: The H-Ubitron Model Effect of Nonlinear Generation of the Longitudinal Electric Field Isochronous Model of a Dopplertron Amplifier Generation of the Additional H-Ubitron Magnetic Field Two-Stream Superheterodyne Free Electron Lasers Two-Stream Instability Ordinary Two-Stream Superheterodyne Free Electron Lasers Project of the Simplest Femtosecond TSFEL Former Plasma-Beam and Parametrical Electron- Wave Superheterodyne FEL Plasma-Beam Superheterodyne Free Electron Lasers: H-Ubitron Model Plasma-Beam Superheterodyne Free Electron Lasers: Dopplertron Model Parametrical Three-Wave Instability in Two- Velocity High-Current Beams Parametrical Electron-Wave Two-Stream Superheterodyne Free Electron Lasers Index
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multiharmonic cubic nonlinear theory of plasma beam Superheterodyne free electron lasers of the dopplertron type
Plasma Physics Reports, 2010Co-Authors: V V Kulish, A. V. Lysenko, V V KovalAbstract:A multiharmonic cubic-nonlinear theory of a plasma-beam Superheterodyne free-electron laser of the dopplertron type is constructed. A retarded electromagnetic wave propagating in the magnetized plasma-beam system toward the electron beam is used for pumping. The multiharmonic interaction of waves which plays an important role is taken into account. Saturation levels and mechanisms are analyzed. The promising application of such systems for generating high-power electromagnetic radiation in the millimeter wavelength range is demonstrated.
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the theory of plasma beam Superheterodyne free electron laser with h ubitron pumping
International Crimean Conference Microwave and Telecommunication Technology, 2009Co-Authors: V V Kulish, A. V. Lysenko, V V KovalAbstract:The nonlinear quadratic theory of plasma-beam Superheterodyne free electron laser with H-ubitron pumping is presented. Multi-harmonious interaction of waves is taken into consideration. Analysis of the growth increment for the signal electromagnetic wave is carried out. It is found that prospects of practical use of the considered systems for generation of especially powerful electromagnetic signals of the mm range could be rather promising.
Iulia Dan - One of the best experts on this subject based on the ideXlab platform.
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a compact 281 319 ghz low power downconverter mmic for Superheterodyne communication receivers
IEEE Transactions on Terahertz Science and Technology, 2021Co-Authors: Christopher M Grotsch, Iulia Dan, Laurenz John, Sandrine Wagner, I KallfassAbstract:This article presents a fully integrated first downconversion stage for a Superheterodyne receiver for high data rate communication at 300 GHz. It comprises a frequency multiplier-by-three, an active dual-gate downconverter, and an LNA. The chip was fabricated in a 35-nm InGaAs-based metamorphic high-electron-mobility transistor technology. The downconverter was designed to be used for different local oscillator (LO) frequencies between 70 and 80 GHz and intermediate frequency (IF) frequencies from 65 to 95 GHz, to create multiple channels for real-time full-duplex communication in the terahertz region. It achieves a conversion gain of 14 dB without IF amplification and 3-dB bandwidth of 25 GHz in the desired upper sideband from 288 to 313 GHz and an estimated NF of 6.6 dB. Without the LNA, the conversion gain of the circuit is $-$ 10 dB and it shows 3-dB bandwidth of 38 GHz in a frequency range from 281 to 319 GHz. Finally, the millimeter-wave monolithic integrated circuit (MMIC) will be compared in detail to a similar state-of-the-art downconverter using a resistive mixer and a necessary additional LO buffer stage in the same technology targeting the identical application. While exhibiting a better conversion gain and bandwidth and occupying only 40% of chip area, the presented downconverter consumes 70% less dc power than the MMIC with a resistive mixer.
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A Superheterodyne 300 GHz wireless link for ultra-fast terahertz communication systems
International Journal of Microwave and Wireless Technologies, 2020Co-Authors: Iulia Dan, G Ducournau, Shintaro Hisatake, Pascal Szriftgiser, Ralfpeter Braun, I KallfassAbstract:A Superheterodyne transmission scheme is adopted and analyzed in a 300 GHz wireless point-to-point link. This was realized using two different intermediate frequency (IF) systems. The first uses fast digital synthesis which provides an IF signal centered around a carrier frequency of 10 GHz. The second involves the usage of commercially available mixers, which work as direct up- and down-converters, to generate the IF input and output. The radio frequency components are based on millimeterwave monolithic integrated circuits at a center frequency of 300 GHz. Transmission experiments over distances up to 10 m are carried out. Data rates of up to 60 Gbps using the first IF option and up to 24 Gbps using the second IF option are achieved. Modulation formats up to 32QAM are successfully transmitted. The linearity of this link and of its components is analyzed in detail. Two local oscillators (LOs), a photonics-based source and a commercially available electronic source are employed and compared. This work validates the concept of Superheterodyne architecture for integration in a beyond-5G network, supplying important guidelines that have to be taken into account in the design steps of a future wireless system.
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A terahertz wireless communication link using a Superheterodyne approach
IEEE Transactions on Terahertz Science and Technology, 2020Co-Authors: Iulia Dan, G Ducournau, Shintaro Hisatake, Pascal Szriftgiser, Ralfpeter Braun, I KallfassAbstract:This article presents a wireless communication point-to-point link operated in the low terahertz (THz) range, at a center frequency of 300 GHz. The link is composed of all-electronic components based on monolithic millimeter wave integrated circuits fabricated in an InGaAs metamorphic high electron mobility transistor technology. Different configurations and architectures are compared and analyzed. The Superheterodyne approach proves to be the most promising of all, being compliant with the new IEEE standard for 100 Gb/s wireless transmissions and showing compatibility to accessible, already available modems. The first option of realizing the Superheterodyne configuration is by combining the 300-GHz transmitter and receiver with of-the-shelf up and down converters operating at a center frequency of 10 GHz. In this case, data rates of up to 24 Gb/s are achieved. The second option employs a fast arbitrary waveform generator that uses a carrier frequency to up-convert the baseband data. In this case, data rates of up to 60 Gb/s and transmission distances of up to 10 m are achieved with complex modulated signals like 16-QAM and 32-QAM. The baseband signal is composed of pseudo-random binary sequences and is analyzed offline using fast analog to digital converters. In Superheterodyne configuration, multichannel transmission is demonstrated. Channel data rates of 10.2 Gb/s using 64-QAM are achieved. The successful transmission of aggregated channels in this configuration shows the potential of THz communication for future high data rate applications.
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a Superheterodyne 300 ghz wireless link for ultra fast terahertz communication systems
European Microwave Conference, 2019Co-Authors: Iulia Dan, G Ducournau, Shintaro Hisatake, Pascal Szriftgiser, Ralfpeter Braun, I KallfassAbstract:This paper presents an all-electronic Superheterodyne wireless system based on millimeterwave monolithic integrated circuits at a center frequency of 300 GHz. Superheterodyne operation is attractive for compliance with the recent IEEE802.15.3d frequency standard. The super-heterodyne transmission is realized, both, with mixers operating at a frequency of 10 GHz, and with an arbitrary waveform generator output centered around 10 GHz. The paper compares both options in terms of error vector magnitude for different baud rates and modulation formats. Data rates of up to 60 Gbps and distances of up to 10 meters are achieved using complex modulated signals like 16-QAM and 32-QAM.
Zhi Gao - One of the best experts on this subject based on the ideXlab platform.
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Induction-Motor Rotor Temperature Estimation Using Superheterodyne Receivers
IEEE Transactions on Industry Applications, 2012Co-Authors: Zhi Gao, Roy S. Colby, Larry TurnerAbstract:A rotor temperature estimator is proposed in this paper for grid-connected squirrel-cage induction motors during dynamic or steady-state operations. The method utilizes a pipelined architecture with two Superheterodyne receivers that operate on a common complex current vector input. The first Superheterodyne receiver detects motor speed by extracting an instantaneous rotor-slot-harmonic frequency from the complex current vector. The second Superheterodyne receiver extracts a complex fundamental current vector from the same complex current vector. Given a few known motor parameters and a complex voltage vector, a model-reference adaptive system then produces an estimate of the rotor time constant from the Superheterodyne receivers' outputs. Finally, the rotor temperature is derived from the estimated rotor time constant via a correlation between the rotor temperature and its resistance. Experimental results demonstrate that the proposed method is capable of estimating induction-motor rotor temperature on a sample-by-sample basis without using temperature or speed sensors.
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Induction motor rotor temperature estimation using Superheterodyne receivers
2011 IEEE Energy Conversion Congress and Exposition, 2011Co-Authors: Zhi Gao, Roy S. Colby, Larry TurnerAbstract:A rotor temperature estimator is proposed in this paper for line-connected squirrel-cage induction motors during dynamic or steady-state operations. The method utilizes a pipelined architecture with two Superheterodyne receivers that operate in parallel on a complex current vector. The first Superheterodyne receiver detects motor speed by extracting an instantaneous rotor slot harmonic frequency from the complex current vector. The second Superheterodyne receiver extracts a complex fundamental current vector from the same complex current vector. A model-reference adaptive system then produces an estimate of the rotor time constant from the Superheterodyne receivers' outputs, plus a complex voltage vector and a few motor parameters. Finally, the rotor temperature is derived from the estimated rotor time constant via a correlation between the rotor temperature and its resistance. Experimental results demonstrate that the proposed method is capable of estimating induction motor rotor temperature on a sample-by-sample basis without using temperature or speed sensors.