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Fernando Briz - One of the best experts on this subject based on the ideXlab platform.

  • Carrier-Signal Selection for Sensorless Control of PM Synchronous Machines at Zero and Very Low Speeds
    IEEE Transactions on Industry Applications, 2010
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating- and rotating-vector Carrier-Signal injection for self-sensing (or sensorless) control of permanent-magnet synchronous machines (PMSMs). The main focus of this paper is the evaluation of estimation errors due to the physical nonideal attributes of both the machine and the inverter. Initial-position and magnet-polarity estimations are analyzed as well. Transient response and Signal processing for both techniques are discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PMSMs.

  • Carrier Signal injection alternatives for sensorless control of active magnetic bearings
    2010 First Symposium on Sensorless Control for Electrical Drives, 2010
    Co-Authors: Pablo Garcia, Fernando Briz, Juan Manuel Guerrero, Islam El-sayed, David Reigosa
    Abstract:

    This paper analyzes different forms of Carrier (high frequency) excitation for sensorless control of three-pole active magnetic bearings. Three options are compared: rotating injection, pulsating injection at a fixed angular position, and pulsating injection at an angular position synchronous to the minimum reluctance axis. Criteria for comparison include sensitivity to displacement changes, parameter and operating point dependence and Signal processing burden for Signal isolation. Theoretical derivations, simulation results and experimental results are included. The system model and the practical implementation will be shown to share similarities with high frequency injection sensorless methods for AC machines but also to have significant differences mainly on how pulsating Carrier Signals are used.

  • Carrier Signal selection for sensorless control of pm synchronous machines at zero and very low speeds
    IEEE Industry Applications Society Annual Meeting, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating and rotating vector Carrier Signal injection for self-sensing (or sensorless) control of PM synchronous machines. The main focus of the study is evaluation of estimation errors due to the physical non-ideal attributes of both the machine and the inverter. Initial position and magnet polarity estimation are analyzed as well. Transient response and Signal processing for both techniques is discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PM synchronous machines.

  • a comparative analysis of pulsating vs rotating vector Carrier Signal injection based sensorless control
    Applied Power Electronics Conference, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper analyzes the sensitivity to non-ideal physical attributes of pulsating and rotating vector Carrier-injection based sensorless techniques, as well as of the impact on the accuracy and robustness of the sensorless control. The analysis is mainly done on the basis of terminal attributes of machines. Initial observations on the subsequent finite element study are also given. Commonly used filtering and position estimation techniques associated with each Carrier Signal are considered. The analysis is supported by experimental evidence obtained using interior PM synchronous machines, but the findings are applicable to other AC machines as well.

  • Temperature Estimation in Inverter Fed Machines Using High Frequency Carrier Signal Injection
    IEEE Transactions on Industry Applications, 2008
    Co-Authors: Fernando Briz, M.w. Degner, J.m. Guerrero, Alberto B. Diez
    Abstract:

    Temperature monitoring using the injection of a high-frequency Carrier Signal voltage is proposed in this paper. The Carrier Signal voltage is used to estimate the transient impedance of the system, which is a function of the stator transient resistance and, therefore, the windingspsila temperature. The variation of the stator transient impedancepsilas phase angle is used to track the temperature of the stator windings. The method can be implemented in standard inverter-fed drives with no additional hardware, with minimal computational requirements, and with practically no interference with the regular operation of the drive.

Z. Q. Zhu - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of parasitic effects in Carrier Signal injection methods for sensorless control of PM synchronous machines
    IET Electric Power Applications, 2018
    Co-Authors: Z. Q. Zhu
    Abstract:

    This study presents the parasitic effects on different Carrier Signal injection methods with alternative sensing Signals for the sensorless control of permanent magnet synchronous machines (PMSMs). The different Carrier injection methods are the rotating injection in the stationary reference frame with Carrier current sensing and with zero-sequence Carrier voltage sensing, the pulsating injection in the estimated synchronous reference frame with Carrier current sensing, and pulsating injection in the anti-rotating reference frame with zero-sequence Carrier voltage sensing, respectively. The parasitic effects, e.g. the magnetic saturation, inverter non-linearity, iron and PM losses, torque ripple etc. will be fully analysed and compared for these different injection methods. All the theoretical analyses are validated by either finite-element analyses or experiments on a laboratory PM machine.

  • Carrier Signal injection-based sensorless control for permanent magnet synchronous machine drives with tolerance of Signal processing delays
    IET Electric Power Applications, 2017
    Co-Authors: Z. Q. Zhu
    Abstract:

    In the case of high precision A/D converters, Carrier Signal injection based position estimation methods can adopt a relatively higher injection frequency (>1/10 pulse width modulation (PWM) switching frequency), which can lead to enhanced system bandwidths. However, simultaneously, Signal processing delay effects (e.g., PWM duty ratio updating delay, etc.) become prominent, resulting in large phase shifts of Carrier currents. On the other hand, the high frequency (HF) resistance effects may also be enlarged. Consequently, large oscillating position estimation errors will arise for the pulsating injection method due to Carrier Signal distortions induced by the delay and HF resistance effects. In order to suppress the undesirable position errors, based on the theoretical analyses, a new compensation strategy of maximizing the useful inductive saliency part and minimising the resistive saliency components using a PI regulator is proposed. The proposed position error suppression method is very easy and simple to implement, and moreover can significantly improve the sensorless control performance. Furthermore, the similar compensation strategy can also be applied for the position error compensation for rotating injection method as will also be discussed in this paper. Finally, the theoretical analyses and compensation effectiveness are validated by experiments on a laboratory interior permanent magnet machine.

  • Carrier Signal Injection-Based Sensorless Control for Permanent-Magnet Synchronous Machine Drives Considering Machine Parameter Asymmetry
    IEEE Transactions on Industrial Electronics, 2016
    Co-Authors: Z. Q. Zhu
    Abstract:

    This paper investigates the influence of asymmetric machine parameters on Carrier Signal injection-based sensorless control of permanent-magnet synchronous machines (PMSMs). With either rotating or pulsating Signal injection, the second harmonic position errors arise due to the parameter asymmetry. Furthermore, it is found that for the two Carriers, the second harmonic errors are different for resistance asymmetry but the same for inductance asymmetry. In order to suppress the position errors, the Carrier Signal selection guidelines are discussed for resistance asymmetry, while for inductance asymmetry, novel online compensation strategies with dual-frequency injection are also proposed. Finally, the theoretical analyses and proposed compensation methods are validated by experiments on an interior PM (IPM) machine with added phase resistance/inductance to simulate asymmetric conditions.

  • Novel Sensorless Control Strategy With Injection of High-Frequency Pulsating Carrier Signal Into Stationary Reference Frame
    IEEE Transactions on Industry Applications, 2014
    Co-Authors: J. M. Liu, Z. Q. Zhu
    Abstract:

    In this paper, a novel sensorless control strategy with the injection of a high-frequency pulsating Carrier Signal into a stationary reference frame is proposed. Differing from the two most commonly used conventional high-frequency Carrier Signal injection methods, i.e., the injection of a rotating Carrier voltage into a stationary reference frame and the injection of a pulsating Carrier voltage into an estimated synchronous reference frame, the new proposed strategy injects a pulsating high-frequency Carrier voltage into a stationary reference frame, which is as stable as the rotating Carrier Signal injection method. Then, the rotor position information can be retrieved from the Carrier current response that is amplitude-modulated by the machine saliency, which is as simple as the pulsating Carrier Signal injection method. The Signal demodulation process, the compensation of the cross-saturation effect, and magnetic polarity detection are also discussed and analyzed in detail. The experimental results on an interior permanent-magnet synchronous machine demonstrate that the new proposed strategy has a robust magnetic polarity detection and that it can achieve an accurate rotor position estimation with good steady-state performance and dynamic performance.

  • Robust Initial Rotor Position Estimation of Permanent-Magnet Brushless AC Machines With Carrier-Signal-Injection-Based Sensorless Control
    IEEE Transactions on Industry Applications, 2013
    Co-Authors: L. M. Gong, Z. Q. Zhu
    Abstract:

    In sensorless control of permanent-magnet brushless ac machines, it is necessary to identify the initial rotor position prior to start-up of the machine. Although saliency-tracking-based sensorless techniques are proven to be a good candidate to estimate the initial rotor position in sensorless control, magnetic polarity identification is another important issue. Since the machine saliency undergoes two cycles in a single electrical period, the estimated position information based on machine saliency has an angle ambiguity of π. With the aid of magnetic saturation effect, this paper proposes a robust initial rotor position estimation scheme, which utilizes both d- and q-axis Carrier currents, instead of only the q-axis Carrier current, in conventional pulsating-Carrier-Signal-injection-based sensorless control algorithm. Integrated with conventional Carrier-Signal-injection-based sensorless algorithm, the proposed technique could obtain the initial rotor position for both standstill and free-running rotors. Finally, the experimental results confirm the effectiveness and robustness of the proposed method.

Pablo Garcia - One of the best experts on this subject based on the ideXlab platform.

  • Carrier-Signal Selection for Sensorless Control of PM Synchronous Machines at Zero and Very Low Speeds
    IEEE Transactions on Industry Applications, 2010
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating- and rotating-vector Carrier-Signal injection for self-sensing (or sensorless) control of permanent-magnet synchronous machines (PMSMs). The main focus of this paper is the evaluation of estimation errors due to the physical nonideal attributes of both the machine and the inverter. Initial-position and magnet-polarity estimations are analyzed as well. Transient response and Signal processing for both techniques are discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PMSMs.

  • Carrier Signal injection alternatives for sensorless control of active magnetic bearings
    2010 First Symposium on Sensorless Control for Electrical Drives, 2010
    Co-Authors: Pablo Garcia, Fernando Briz, Juan Manuel Guerrero, Islam El-sayed, David Reigosa
    Abstract:

    This paper analyzes different forms of Carrier (high frequency) excitation for sensorless control of three-pole active magnetic bearings. Three options are compared: rotating injection, pulsating injection at a fixed angular position, and pulsating injection at an angular position synchronous to the minimum reluctance axis. Criteria for comparison include sensitivity to displacement changes, parameter and operating point dependence and Signal processing burden for Signal isolation. Theoretical derivations, simulation results and experimental results are included. The system model and the practical implementation will be shown to share similarities with high frequency injection sensorless methods for AC machines but also to have significant differences mainly on how pulsating Carrier Signals are used.

  • high frequency Carrier Signal voltage selection for stator winding fault diagnosis in inverter fed ac machines
    IEEE Transactions on Industrial Electronics, 2008
    Co-Authors: M W Degne, Pablo Garcia, A Diez
    Abstract:

    The diagnosis of stator winding faults in inverter-fed AC machines using an injected high-frequency Carrier-Signal voltage is analyzed in this paper. Measurement of the resulting Carrier Signals (either the negative-sequence Carrier-Signal current or the zero-sequence components) is used to detect turn faults at an incipient stage. The Carrier frequency and magnitude are shown to have significant impact on the performance of the method, with the criteria for their selection being presented. The proposed technique shows low sensitivity to the working condition of the machine, i.e., torque level, flux levels, and fundamental excitation frequency.

  • Carrier Signal selection for sensorless control of pm synchronous machines at zero and very low speeds
    IEEE Industry Applications Society Annual Meeting, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating and rotating vector Carrier Signal injection for self-sensing (or sensorless) control of PM synchronous machines. The main focus of the study is evaluation of estimation errors due to the physical non-ideal attributes of both the machine and the inverter. Initial position and magnet polarity estimation are analyzed as well. Transient response and Signal processing for both techniques is discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PM synchronous machines.

  • a comparative analysis of pulsating vs rotating vector Carrier Signal injection based sensorless control
    Applied Power Electronics Conference, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper analyzes the sensitivity to non-ideal physical attributes of pulsating and rotating vector Carrier-injection based sensorless techniques, as well as of the impact on the accuracy and robustness of the sensorless control. The analysis is mainly done on the basis of terminal attributes of machines. Initial observations on the subsequent finite element study are also given. Commonly used filtering and position estimation techniques associated with each Carrier Signal are considered. The analysis is supported by experimental evidence obtained using interior PM synchronous machines, but the findings are applicable to other AC machines as well.

Bernhard Piepenbreier - One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Carrier Signal based approaches for sensorless wound rotor synchronous machines
    2014 International Symposium on Power Electronics Electrical Drives Automation and Motion, 2014
    Co-Authors: Alexander Rambetius, Bernhard Piepenbreier
    Abstract:

    Wound rotor synchronous machines enable a large variety of approaches for Carrier Signal based sensorless control since the rotor voltage serves as an additional input to the system and the rotor current as an additional, easy to measure, state variable. Consequently it is possible to use the rotor winding either as the transmitter or as the receiver of a Carrier Signal. In these cases the mutual inductance between the d-axis and the rotor winding is of major importance. Moreover a rotor saliency can be evaluated if the stator is used as the transmitter and as the receiver of the Carrier Signal. If voltage injection is used, the rotor winding acts like a damper winding for the Carrier Signal and consequently the evaluated saliency differs from the saliency which is utilized for sensorless control of permanent magnet synchronous machines. Carrier current control on the other hand offers the possibility to evaluate a magnetic saliency regarding the inductances in the d- and q-axis. This work provides a detailed review of the aforementioned approaches and analyses the prerequisites. In addition to this the different approaches are made comparable in terms of Signal-to-noise ratio and cross saturation. This is done by introducing suitable intensity terms. With the help of identified parameters the most promising approach for the investigated machine is found. Experimental results confirm the validity of the comparison.

  • Sensorless control of wound rotor synchronous machines using the switching of the rotor chopper as a Carrier Signal
    2013 IEEE International Symposium on Sensorless Control for Electrical Drives and Predictive Control of Electrical Drives and Power Electronics (SLED , 2013
    Co-Authors: Alexander Rambetius, Bernhard Piepenbreier
    Abstract:

    Wound rotor synchronous machines open up new possibilities in Carrier Signal based sensorless control since the rotor voltage serves as an additional input to the system and the field current as an additional, easy to measure, state variable. Approaches for sensorless control of PMSMs use the stator as the transmitter and as the receiver of the Carrier Signal. A new alternative for wound rotor synchronous machines is to use the field winding as the transmitter and the stator as receiver. Since the field inductance is usually very large, a Signal injection into the rotor is not reasonable because large rotor voltages are obligatory to create detectable stator currents. Therefore the presented approaches make use of the switching of the dc-field chopper as a Carrier Signal. Two methods are compared: The first method evaluates the stator currents in rotor fixed coordinates using a tracking observer. The second one uses the stator currents in stator fixed coordinates to directly compute the rotor position. Both methods consider cross saturation effects. In contrast to approaches for Carrier Signal based sensorless control of PMSMs no differential magnetic saliency is mandatory. Moreover no additional Signal injection is necessary. Experimental results prove the performance of the proposed methods.

  • Carrier Signal based sensorless control of electrically excited synchronous machines at standstill and low speed using the rotor winding as a receiver
    2013 15th European Conference on Power Electronics and Applications (EPE), 2013
    Co-Authors: Alexander Rambetius, Sebastian Ebersberger, Markus Seilmeier, Bernhard Piepenbreier
    Abstract:

    This paper presents a new Carrier Signal based approach for motion sensorless control of electrically excited synchronous machines. In the case of permanent magnet synchronous machines sensorless control at standstill and low speed is mostly done by injecting a high-frequency voltage and evaluating the resulting current response. Hence, the stator is used as the transmitter and as the receiver of the Carrier Signal. The major drawback is that a magnetic saliency is mandatory. In the case of electrically excited synchronous machines the rotor voltage serves as an additional input to the system and the resulting field current as an additional, easy to measure, state variable. The presented approach makes use of this fact and uses the field winding as the receiver of a Carrier Signal, which is injected into the stator winding. Like this no magnetic saliency is mandatory in order to track the position. The new approach is compared to a well-known Carrier Signal based method, in which the stator works as the transmitter and as the receiver of the Carrier Signal. In this case a magnetic saliency is mandatory which differs from the saliency necessary for permanent magnet synchronous machines. The applicability of both approaches is proven in experiments.

Robert D. Lorenz - One of the best experts on this subject based on the ideXlab platform.

  • Carrier-Signal Selection for Sensorless Control of PM Synchronous Machines at Zero and Very Low Speeds
    IEEE Transactions on Industry Applications, 2010
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating- and rotating-vector Carrier-Signal injection for self-sensing (or sensorless) control of permanent-magnet synchronous machines (PMSMs). The main focus of this paper is the evaluation of estimation errors due to the physical nonideal attributes of both the machine and the inverter. Initial-position and magnet-polarity estimations are analyzed as well. Transient response and Signal processing for both techniques are discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PMSMs.

  • Carrier Signal selection for sensorless control of pm synchronous machines at zero and very low speeds
    IEEE Industry Applications Society Annual Meeting, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating and rotating vector Carrier Signal injection for self-sensing (or sensorless) control of PM synchronous machines. The main focus of the study is evaluation of estimation errors due to the physical non-ideal attributes of both the machine and the inverter. Initial position and magnet polarity estimation are analyzed as well. Transient response and Signal processing for both techniques is discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PM synchronous machines.

  • a comparative analysis of pulsating vs rotating vector Carrier Signal injection based sensorless control
    Applied Power Electronics Conference, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper analyzes the sensitivity to non-ideal physical attributes of pulsating and rotating vector Carrier-injection based sensorless techniques, as well as of the impact on the accuracy and robustness of the sensorless control. The analysis is mainly done on the basis of terminal attributes of machines. Initial observations on the subsequent finite element study are also given. Commonly used filtering and position estimation techniques associated with each Carrier Signal are considered. The analysis is supported by experimental evidence obtained using interior PM synchronous machines, but the findings are applicable to other AC machines as well.

  • IAS - Carrier Signal Selection for Sensorless Control of PM Synchronous Machines at Zero and Very Low Speeds
    2008 IEEE Industry Applications Society Annual Meeting, 2008
    Co-Authors: D Raca, Fernando Briz, Pablo Garcia, David Reigosa, Robert D. Lorenz
    Abstract:

    This paper compares pulsating and rotating vector Carrier Signal injection for self-sensing (or sensorless) control of PM synchronous machines. The main focus of the study is evaluation of estimation errors due to the physical non-ideal attributes of both the machine and the inverter. Initial position and magnet polarity estimation are analyzed as well. Transient response and Signal processing for both techniques is discussed for completeness. The theoretical analysis is supported by experimental and simulation evidence obtained using interior PM synchronous machines.

  • Static and dynamic behavior of saturation-induced saliencies and their effect on Carrier-Signal-based sensorless AC drives
    IEEE Transactions on Industry Applications, 2002
    Co-Authors: Fernando Briz, Alberto B. Diez, M.w. Degner, Robert D. Lorenz
    Abstract:

    This paper analyzes the origin and the behavior of saturation-induced saliencies in induction machines, and their influence on Carrier-Signal-injection-based sensorless techniques. The modeling of saturation-induced saliencies is necessary for the estimation of flux position, while the minimization of their influence is desired for the estimation of rotor position. Specifically focusing on rotor position estimation, there are two ways to achieve this minimization, the first being the use of a machine design that reduces the magnitude of the undesired saturation-induced saliencies and the second being the compensation in the estimator of the undesired saturation-induced saliencies. The modeling of saturation-induced saliencies, not only statically, but also dynamically, i.e., when the operating point of the machine changes, is addressed by this paper.