The Experts below are selected from a list of 15930 Experts worldwide ranked by ideXlab platform

Patrick Bartholomeus - One of the best experts on this subject based on the ideXlab platform.

  • modeling and control of the ultracapacitor based regenerative controlled Electric Drives
    IEEE Transactions on Industrial Electronics, 2011
    Co-Authors: Petar J Grbovic, Philippe Delarue, Le P Moigne, Patrick Bartholomeus
    Abstract:

    Two issues are still a great challenge in the design and application of advanced controlled Electric Drives, namely, recovery of the braking energy and ride-through capability of the drive system. Apart from the ordinary solutions, such as back-to-back and matrix converters, an approach based on the ordinary diode front-end-drive converter equipped with an energy-storage element is used in some applications, such as traction and lift Drives. This approach has come into focus recently with the rapid development of electrochemical double layer capacitors, so-called ultracapacitors. To achieve system flexibility and better efficiency, the ultracapacitor is connected to the drive via a dc-dc converter. The converter is controlled in such a way as to fulfill the control objectives: the control of the dc-bus voltage, the ultracapacitor state of charge, and peak-power filtering. In this paper, we have discussed the modeling and control aspects of the regenerative controlled Electric drive using the ultracapacitor as energy-storage and emergency power-supply device. The presented model and control scheme have been verified by simulation and a set of experiments on a 5.5-kW prototype. The results are presented and discussed in this paper.

  • The Ultracapacitor-Based Controlled Electric Drives With Braking and Ride-Through Capability: Overview and Analysis
    IEEE Transactions on Industrial Electronics, 2011
    Co-Authors: Petar J. Grbović, Philippe Delarue, Philippe Le Moigne, Patrick Bartholomeus
    Abstract:

    Two issues are still a great challenge in design and application of advanced controlled Electric Drives: 1) recovery of the braking energy and 2) ride-through capability of the drive system. Apart from ordinary solutions, such as back-to-back and matrix converters, the ordinary drive converter equipped with an energy storage element is used in specific applications such as traction and lift Drives. This approach came into focus recently with rapid development of electrochemical double-layer capacitors, so-called ultracapacitors. The ultracapacitor is an electrochemical capacitor having energy density much greater than that of standard electrolytic capacitors. Additionally, the ultracapacitor power density is much higher than that of the existing electrochemical batteries. In this paper, a regenerative controlled Electric drive having extended ride-through capability is discussed. The basic principle has been extensively analyzed, including a detailed analysis of all operational modes. A bidirectional three-level dc-dc converter has been considered as the interface power converter. The ultracapacitor design guideline is given. A control algorithm that allows control of the dc bus voltage and the ultracapacitor voltage and current has been presented and briefly analyzed. The regenerative controlled drive system has been tested, and the results are presented and discussed.

Bernd Ponick - One of the best experts on this subject based on the ideXlab platform.

  • challenges and opportunities of very light high performance Electric Drives for aviation
    Energies, 2018
    Co-Authors: Markus Henke, Gerrit Narjes, Jan Hoffmann, Constantin Wohlers, Stefan Urbanek, Christian Heister, Joern Steinbrink, Wolfruediger Canders, Bernd Ponick
    Abstract:

    The demand for alternative fueling methods to reduce the need for fossil fuels is not limited to the electrification of ground vehicles. More-Electric and all-Electric aircraft pose challenges, with extensive requirements in terms of power density, efficiency, safety, and environmental sustainability. This paper focuses on Electrical machines and their components, especially for high-power applications like the main propulsion. The Electrical machine is evaluated from different aspects, followed by a closer look at the components and materials to determine the suitability of the current standard materials and advanced technologies. Furthermore, the mechanical and thermal aspects are reviewed, including new and innovative concepts for the cooling of windings and for the use of additive manufacturing. Aircraft have special demands regarding weight and installation space. Following recent developments and looking ahead to the future, the need and the possibilities for light and efficient Electrical machines are addressed. All of the approaches and developments presented lead to a better understanding of the challenges to be expected and highlight the upcoming opportunities in Electrical machine design for the use of Electric motors and generators in future aircraft. Several prototypes of Electrical machines for smaller aircraft already exist, such as the Electric drive of the Siemens powered Extra 330LE. The focus of this paper is to provide an overview of current technical possibilities and technical interrelations of high performance Electric Drives for aviation. A 1 MW drive is exemplified to present the possibilities for future Drives for airplanes carrying a larger number of passengers. All presented techniques can also be applied to other drive power classes.

M. A. Grigorev - One of the best experts on this subject based on the ideXlab platform.

  • the stages of development of high performance adjustable ac Drives for the objects of metallurgical production
    IOP Conference Series: Materials Science and Engineering, 2019
    Co-Authors: M. A. Grigorev, A. A. Gryzlov, V S Katrichek
    Abstract:

    In the scientific article the requirements for regulated energy-efficient AC Electric Drives of metallurgical production facilities are formulated. The main stages of development of synchronous reluctance Electric Drives, including the development of power units, the synthesis of the control system, the choice of mathematical apparatus, as well as the experimental study of the developed system are shown. For the mechanism of a flying shear at PJSC "Chelyabinskiy metalurgicheskiy kombinat" the use of contactless synchronous Electric drive with brushless salient pole rotor is most effective, as this allows you to implement over the time of 4-6 times of the rated value and the ability to work in chemically aggressive conditions. It is shown that the task of providing the trajectory of motion can be implemented only in systems with independent control over the excitation channel and the armature. It is shown that as a mathematical description of the system, the structure of the Electric drive can be used, similar to the DC drive, but the control signals are supplied from the phase current formation node. The method of experimental research shows that the synthesis of current control circuits can be performed by frequency response methods. Analysis of the experimental current waveforms showed that the separate control of the armature and excitation current is realized independently, while the specific indicators of the system were better than synchronous frequency-controlled Electric Drives by about 25.

  • Frequency-Response Methods for Synthesizing Controlled High-Speed Electric Drives of Compressors
    Russian Electrical Engineering, 2019
    Co-Authors: A. A. Gryzlov, M. A. Grigorev
    Abstract:

    Frequency-response methods for analyzing and synthesizing current and electromagnetic torque control loops in alternating-current Electric Drives are proposed. It is shown that, when solving the problems of analysis and synthesis of the current and torque control loops, the unchanged part of the Electric drive can be approximated by a linear system with the amplitude-modulated signal. It has been established that the transient and steady-state processes of variables in the motor’s phase windings can be considered in the current and torque loops independently. The use of frequency-response methods for identification of controlled objects allows consideration of the cross-magnetic links between the three-phase windings of the Electric machine and the mathematical description of the system can be represented by a simplified set of equations, which is convenient for setting up and adjusting the system by engineering personnel. Using experimental Bode plots, it has been shown that the steady frequency passband in the current control loop can reach 4000 rad/s, which facilitates the adjustment of the toque control loop when the drive is running at a speed of 6000 rpm. A further increase in the speed of the drive with the specific mass and dimensional parameters preserved at the same level can be achieved only by introducing correction signals. It is shown that in multiphase Electric Drives with more than three phases, the phase winding zone decreases and the leakage inductive reactance of the phase winding decreases, which allows a significant expansion of the frequency passband in the current, torque, and speed control circuits.

  • Taking Iron Loss into Account in Control Systems of Synchronous Reluctance Electric Drives
    Russian Electrical Engineering, 2019
    Co-Authors: A. N. Gorozhankin, A. A. Gryzlov, Sergey S Bukhanov, M. A. Grigorev
    Abstract:

    Synchronous reluctance Electric Drives are being developed due to their advantages of contactlessness, high overload and specific torques, absence of loss in the rotor, and large control range, as well as progress that is being made in the fields of information and power electronics. It is shown that iron loss significantly affects the control algorithms for synchronous reluctance machines. A four-loop vector control system of a synchronous reluctance machine is considered. The main ducts are the current and electromagnetic torque control circuits of the Electric machine and the secondary ducts are the stator flux linkage and angular velocity contours. The features of observer synthesis for vector control system taking into account iron losses and magnetic saturation of the system are given. By means of experimental studies, the adequacy of the received observer was shown. The synthesis of algorithms for optimal control of the synchronous reluctance machine, taking into account iron loss, is given. The first algorithm assumes the existence of a table with optimal values of control actions. The second provides for the synthesis of an adaptive torque controller, which will be automatically tuned to the optimal control action. The obtained control algorithms are universal and can be applied in other control systems of synchronous reluctance machines, for example, in direct torque control systems.

  • synthesis of Electric Drives realizing limit operating regimes in terms of operation speed and overload capacity
    Russian Electrical Engineering, 2015
    Co-Authors: M. A. Grigorev
    Abstract:

    A special class of machine Electric Drives, which have an increased range of variation of the load torque and speeds with harsh and extreme operating conditions, are considered. It is shown that expansion of these parameters without increasing the rated power of the Electric drive provides a significantly improved quality of technological regimes without increasing the cost of the Electric drive. The strategy of the synthesis (design) of electrotechnical complexes is formulated providing the limit characteristics and consisting of the following stages: synthesis of a generic mathematical model, determination of the limit capacity of the object of control, parameter optimization of the electrotechnical complex in order to provide the limit characteristics, selection of simplified mathematical models of an Electric drive, synthesis of the structures and the control system, and the search for the phase path of motion of the Electric drive–working body system realizing the extreme operating regime. A determination of the possibilities of each stage is given.

Philippe Delarue - One of the best experts on this subject based on the ideXlab platform.

  • modeling and control of the ultracapacitor based regenerative controlled Electric Drives
    IEEE Transactions on Industrial Electronics, 2011
    Co-Authors: Petar J Grbovic, Philippe Delarue, Le P Moigne, Patrick Bartholomeus
    Abstract:

    Two issues are still a great challenge in the design and application of advanced controlled Electric Drives, namely, recovery of the braking energy and ride-through capability of the drive system. Apart from the ordinary solutions, such as back-to-back and matrix converters, an approach based on the ordinary diode front-end-drive converter equipped with an energy-storage element is used in some applications, such as traction and lift Drives. This approach has come into focus recently with the rapid development of electrochemical double layer capacitors, so-called ultracapacitors. To achieve system flexibility and better efficiency, the ultracapacitor is connected to the drive via a dc-dc converter. The converter is controlled in such a way as to fulfill the control objectives: the control of the dc-bus voltage, the ultracapacitor state of charge, and peak-power filtering. In this paper, we have discussed the modeling and control aspects of the regenerative controlled Electric drive using the ultracapacitor as energy-storage and emergency power-supply device. The presented model and control scheme have been verified by simulation and a set of experiments on a 5.5-kW prototype. The results are presented and discussed in this paper.

  • The Ultracapacitor-Based Controlled Electric Drives With Braking and Ride-Through Capability: Overview and Analysis
    IEEE Transactions on Industrial Electronics, 2011
    Co-Authors: Petar J. Grbović, Philippe Delarue, Philippe Le Moigne, Patrick Bartholomeus
    Abstract:

    Two issues are still a great challenge in design and application of advanced controlled Electric Drives: 1) recovery of the braking energy and 2) ride-through capability of the drive system. Apart from ordinary solutions, such as back-to-back and matrix converters, the ordinary drive converter equipped with an energy storage element is used in specific applications such as traction and lift Drives. This approach came into focus recently with rapid development of electrochemical double-layer capacitors, so-called ultracapacitors. The ultracapacitor is an electrochemical capacitor having energy density much greater than that of standard electrolytic capacitors. Additionally, the ultracapacitor power density is much higher than that of the existing electrochemical batteries. In this paper, a regenerative controlled Electric drive having extended ride-through capability is discussed. The basic principle has been extensively analyzed, including a detailed analysis of all operational modes. A bidirectional three-level dc-dc converter has been considered as the interface power converter. The ultracapacitor design guideline is given. A control algorithm that allows control of the dc bus voltage and the ultracapacitor voltage and current has been presented and briefly analyzed. The regenerative controlled drive system has been tested, and the results are presented and discussed.

Markus Henke - One of the best experts on this subject based on the ideXlab platform.

  • challenges and opportunities of very light high performance Electric Drives for aviation
    Energies, 2018
    Co-Authors: Markus Henke, Gerrit Narjes, Jan Hoffmann, Constantin Wohlers, Stefan Urbanek, Christian Heister, Joern Steinbrink, Wolfruediger Canders, Bernd Ponick
    Abstract:

    The demand for alternative fueling methods to reduce the need for fossil fuels is not limited to the electrification of ground vehicles. More-Electric and all-Electric aircraft pose challenges, with extensive requirements in terms of power density, efficiency, safety, and environmental sustainability. This paper focuses on Electrical machines and their components, especially for high-power applications like the main propulsion. The Electrical machine is evaluated from different aspects, followed by a closer look at the components and materials to determine the suitability of the current standard materials and advanced technologies. Furthermore, the mechanical and thermal aspects are reviewed, including new and innovative concepts for the cooling of windings and for the use of additive manufacturing. Aircraft have special demands regarding weight and installation space. Following recent developments and looking ahead to the future, the need and the possibilities for light and efficient Electrical machines are addressed. All of the approaches and developments presented lead to a better understanding of the challenges to be expected and highlight the upcoming opportunities in Electrical machine design for the use of Electric motors and generators in future aircraft. Several prototypes of Electrical machines for smaller aircraft already exist, such as the Electric drive of the Siemens powered Extra 330LE. The focus of this paper is to provide an overview of current technical possibilities and technical interrelations of high performance Electric Drives for aviation. A 1 MW drive is exemplified to present the possibilities for future Drives for airplanes carrying a larger number of passengers. All presented techniques can also be applied to other drive power classes.