Digital Generator Control Unit Design for a Variable Frequency Synchronous Generator in MEA

Li, Weilin; Yang, Yang; Zhang, Xiaobin

doi:10.3390/en11010096

Cited by 9 publications

(6 citation statements)

References 17 publications

(23 reference statements)

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“…In order to derive again, the expression for the derivative of dc has to be computed. Approximatively, the bus current dc is related to the generator currents by (4). Again, we stress that this is a crude approximation, whose validity will be assessed by the strong robustness properties of the sliding mode approach.…”

Section: Control Of the Generator In Sliding Modementioning

confidence: 99%

“…Assuming that the generator shaft rotates at constant speed, the regulation of the generator output voltage is performed by varying the generator field windings current, by means of a Generator Control Unit (GCU). The GCU is usually based on a standard controller, that is, Proportional [3] (P) or Proportional-Integral (PI) controller [4] or lead-lag compensators [5]. However, it has been shown [6] that standard, and in general linear controllers, have a fundamental limitation: the desired set point is reached only asymptotically, theoretically in infinite time.…”

Section: Introductionmentioning

confidence: 99%

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Robust Control of Aeronautical Electrical Generators for Energy Management Applications

Canciello¹,

Cavallo²,

Guida³

2017

International Journal of Aerospace Engineering

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A new strategy for the control of aeronautical electrical generators via sliding manifold selection is proposed, with an associated innovative intelligent energy management strategy used for efficient power transfer between two sources providing energy to aeronautical loads, having different functionalities and priorities. Electric generators used for aeronautical application involve several machines, including a main generator and an exciter. Standard regulators (PI or PID-like) are normally used for the rectification of the generator voltage to be used to supply a high-voltage DC bus. The regulation is obtained by acting on a DC/DC converter that imposes the field voltage of the exciter. In this paper, the field voltage is fed to the generator windings by using a second-order sliding mode controller, resulting into a stable, robust (against disturbances) action and a fast convergence to the desired reference. By using this strategy, an energy management strategy is proposed that dynamically changes the voltage set point, in order to intelligently transfer power between two voltage busses. Detailed simulation results are provided in order to show the effectiveness of the proposed energy management strategy in different scenarios.

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Section: Control Of the Generator In Sliding Modementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust Control of Aeronautical Electrical Generators for Energy Management Applications

Canciello¹,

Cavallo²,

Guida³

2017

International Journal of Aerospace Engineering

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show abstract

“…In addition, the control parameter adjustment process is not convenient. Therefore, with the development of digital circuits, generator controllers have also been implemented based on digital circuits [11,12]. Due to digital controllers such as digital signal processors (DSP), it is possible to apply various new control algorithms for generator controllers [13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the system includes a nonlinear link, the rotating rectifier, so there are many nonlinear factors in the power generator system [19][20][21]. A conventional PI controller needs a second-order linear model to describe the system [12], making it hard to tune the control parameters for aero-generators.…”

Section: Introductionmentioning

confidence: 99%

A Novel Fuzzy PI Control Method for Variable Frequency Brushless Synchronous Generators

Wang

Liu

et al. 2021

Energies

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With the application of more electric aircraft (MEA) technology, variable frequencies and high power ratings become import features of aero-generators. The brushless synchronous generator, which has a three-stage structure, is the most commonly used type of aero-generator. Due to the variation of operating conditions, the implementation of generator controllers becomes more and more difficult. In this paper, a state space model of a generator is derived and the influence of different operating conditions on the frequency response characteristics of the generator is revealed. Based on a fuzzy PI controller, an additional fuzzy logic controller is applied to modify the PI parameters of the voltage loop by introducing the generator speed to cope with the speed variation. Finally, the results of the simulations and experiments demonstrate that the dual fuzzy PI controller can improve both the steady-state and dynamic performance of the brushless synchronous generator, verifying the previous theoretical study.

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“…The variable frequency power supply system of 115 V/360~800 Hz is applied by the more electric aircraft [9][10][11][12]. Compared with constant frequency power supply, the performance of equipment and system should adapt to this change [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Starting Pulse Vibration Torque Analysis of Aviation Variable Frequency Asynchronous Motor Based on Low-Frequency Step-Down Starting Methods

2020

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The more electric aircraft provides 115 V/360~800 Hz variable frequency power supply for the variable frequency asynchronous motor, and the motor operation characteristics change with the power frequency variation. It causes the starting pulse vibration torque with the low-frequency power supply (360 Hz) to increase greatly and the mechanical shock and fatigue damage. Therefore, this paper proposes step-down starting method with the low-frequency power supply. Based on the electromagnetic principles generated by the starting pulse vibration torque, this paper uses a novel method of simulation data fitting to establish an approximate model of the starting pulse vibration torque. The parameter design formulas of the low-frequency step-down starting methods, including the reducing voltage, the series resistance, and the series inductance are proposed. The effectiveness of the different methods are verified, and the performance is compared through the simulation. The experimental verification of a small power asynchronous motor is completed. The simulation and experiment results show that the low-frequency step-down starting methods effectively reduce the starting peak torque, and also suppress the shock impact of starting current on the power supply.

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Digital Generator Control Unit Design for a Variable Frequency Synchronous Generator in MEA

Cited by 9 publications

References 17 publications

Robust Control of Aeronautical Electrical Generators for Energy Management Applications

Robust Control of Aeronautical Electrical Generators for Energy Management Applications

A Novel Fuzzy PI Control Method for Variable Frequency Brushless Synchronous Generators

Starting Pulse Vibration Torque Analysis of Aviation Variable Frequency Asynchronous Motor Based on Low-Frequency Step-Down Starting Methods

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