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Aircraft Power Systems

The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform

Pericle Zanchetta – 1st expert on this subject based on the ideXlab platform

  • Power conversion for a novel AC/DC Aircraft electrical distribution system
    IET Electrical Systems in Transportation, 2014
    Co-Authors: Patrick Wheeler, Pericle Zanchetta, Jon Clare, Andrew Trentin

    Abstract:

    This study proposes a novel and compact AC/DC electrical distribution system for new generation Aircraft. In these new Aircraft Power Systems, all loads are fed by two DC bus Systems: at 28 V and at �270 V. The electrical distribution system, whose design and implementation are described in this study, has only one primary AC source (360-900 Hz at 230 V) with all the required DC voltage levels being derived from this source. This solution enables elimination of the complex mechanical coupling apparatus currently used, for fixed frequency AC Systems, to maintain the generator speed at constant level while the engines operate at variable speed. Under the proposed solution, all the conversion stages needed to generate various output voltage levels are implemented by using Power converters assembled in one unit. Each converter has a current control loop in order to regulate the output current even during output line short circuits and also to limit the inrush current to the circuit at turn-on. To prove the concept, a 5 kW prototype was designed and tested, and demonstrated to meet all the specifications within the relevant standards regarding input and output Power quality.

  • Iterative Learning Control With Variable Sampling Frequency for Current Control of Grid-Connected Converters in Aircraft Power Systems
    IEEE Transactions on Industry Applications, 2013
    Co-Authors: Pericle Zanchetta, M. Degano, Paolo Mattavelli

    Abstract:

    This paper investigates the feasibility of an iterative learning control (ILC) with variable sampling frequency for current control of Power converters in frequency-wild Power Systems. The proposed solution is explained and demonstrated for the case of a shunt active filter in new-generation Aircraft, where a variable-speed variable-frequency Power system, typically between 360 and 900 Hz, is nowadays used. Due to the high supply frequency, such application is particularly demanding for both Power and control devices, requiring control capabilities even for frequencies up to several kilohertz. Furthermore, variable supply frequency leads to variable frequency harmonics in the Aircraft grid that are challenging to track and compensate. An original and effective solution based on an ILC approach, where both the number of samples per period and the sampling frequency are changed, is studied and implemented. Experimental results confirm the validity of the proposed strategy.

  • Variable sampling frequency in iterative learning current Control for Shunt Active Filter in Aircraft Power Systems
    2011 IEEE Energy Conversion Congress and Exposition, 2011
    Co-Authors: Pericle Zanchetta, M. Degano, Paolo Mattavelli

    Abstract:

    This paper investigates the feasibility of an Iterative Leaning current Control (ILC) with variable sampling frequency to realize a 3-phase Shunt Active Filter (SAF) used for harmonic compensation in new generation Aircrafts, where a Variable Speed Variable-Frequency (VSVF) Power system, typically between 360 and 900Hz, is nowadays used. Due to the high supply frequency, such applications are particularly demanding for both Power and control devices, requiring control capabilities even for frequencies up to several kHz. Furthermore variable supply frequency leads to variable frequency harmonics in the Aircraft grid that are challenging to track and compensate. An original and effective solution based on an iterative learning control approach, where both the number of samples per period and the sampling frequency are changed, is studied and implemented. Experimental results confirm the validity of the proposed solution.

Andrew J. Forsyth – 2nd expert on this subject based on the ideXlab platform

  • Behavioral Modeling of a Switched Reluctance Generator for Aircraft Power Systems
    IEEE Transactions on Industrial Electronics, 2014
    Co-Authors: Virgilio Valdivia, Rebecca Todd, Frank J. Bryan, Andrés Barrado, Antonio Lázaro, Andrew J. Forsyth

    Abstract:

    A system-level modeling technique for a switched reluctance generator (SRG) is described for aerospace applications. Unlike existing techniques, this model is very simple and only reproduces the average behavior of the input-output variables that are required for system-level analysis of the Aircraft Power distribution system. The model is parameterized from the measured generator response, avoiding the need for a detailed knowledge of the equipment structure, which may be unavailable. The modeling procedure is described in detail and validated by measurements on an SRG within an Aircraft test facility.

  • Behavioural modelling of a switched reluctance motor drive for Aircraft Power Systems
    IET Electrical Systems in Transportation, 2014
    Co-Authors: Rebecca Todd, Virgilio Valdivia, Frank J. Bryan, Andrés Barrado, Antonio Lázaro, Andrew J. Forsyth

    Abstract:

    A system-level behavioural modelling technique is described for a switched reluctance motor drive. The model enables simple and efficient analysis or simulation of multiple drive Systems such as pumps, actuators and engine starters within a more-electric network, for example, on-board an Aircraft. The behavioural model is based on a Power balance analysis. The transfer functions in the model are parameterised from experimental tests on the drive system, resulting in a simple model that only reproduces the average behaviour of the input-output variables necessary for system-level analysis. No data from the manufacturer is required to develop the model. The technique is discussed and validated using an engine starter in an Aircraft test facility.

  • DC-bus Power quality for Aircraft Power Systems during generator fault conditions
    IET Electrical Systems in Transportation, 2011
    Co-Authors: Rebecca Todd, Andrew J. Forsyth

    Abstract:

    Higher-voltage, 540 V, Aircraft DC-bus Power quality is examined experimentally and by computer simulation during a short-circuit fault across the phase terminals of a 70 kW, five-phase, permanent magnet fault-tolerant generator. The DC-bus transients caused by the short-circuiting of the generator phases are seen to exceed the limits in MIL-STD-704F and a control algorithm is proposed for a supercapacitor-based energy storage device that mitigates the transients. The controller performance is illustrated by computer simulations for a range of bus switching scenarios.

Rebecca Todd – 3rd expert on this subject based on the ideXlab platform

  • Behavioral Modeling of a Switched Reluctance Generator for Aircraft Power Systems
    IEEE Transactions on Industrial Electronics, 2014
    Co-Authors: Virgilio Valdivia, Rebecca Todd, Frank J. Bryan, Andrés Barrado, Antonio Lázaro, Andrew J. Forsyth

    Abstract:

    A system-level modeling technique for a switched reluctance generator (SRG) is described for aerospace applications. Unlike existing techniques, this model is very simple and only reproduces the average behavior of the input-output variables that are required for system-level analysis of the Aircraft Power distribution system. The model is parameterized from the measured generator response, avoiding the need for a detailed knowledge of the equipment structure, which may be unavailable. The modeling procedure is described in detail and validated by measurements on an SRG within an Aircraft test facility.

  • Behavioural modelling of a switched reluctance motor drive for Aircraft Power Systems
    IET Electrical Systems in Transportation, 2014
    Co-Authors: Rebecca Todd, Virgilio Valdivia, Frank J. Bryan, Andrés Barrado, Antonio Lázaro, Andrew J. Forsyth

    Abstract:

    A system-level behavioural modelling technique is described for a switched reluctance motor drive. The model enables simple and efficient analysis or simulation of multiple drive Systems such as pumps, actuators and engine starters within a more-electric network, for example, on-board an Aircraft. The behavioural model is based on a Power balance analysis. The transfer functions in the model are parameterised from experimental tests on the drive system, resulting in a simple model that only reproduces the average behaviour of the input-output variables necessary for system-level analysis. No data from the manufacturer is required to develop the model. The technique is discussed and validated using an engine starter in an Aircraft test facility.

  • DC-bus Power quality for Aircraft Power Systems during generator fault conditions
    IET Electrical Systems in Transportation, 2011
    Co-Authors: Rebecca Todd, Andrew J. Forsyth

    Abstract:

    Higher-voltage, 540 V, Aircraft DC-bus Power quality is examined experimentally and by computer simulation during a short-circuit fault across the phase terminals of a 70 kW, five-phase, permanent magnet fault-tolerant generator. The DC-bus transients caused by the short-circuiting of the generator phases are seen to exceed the limits in MIL-STD-704F and a control algorithm is proposed for a supercapacitor-based energy storage device that mitigates the transients. The controller performance is illustrated by computer simulations for a range of bus switching scenarios.