Development of a PM-generator for a counter-rotating micro-hydro turbine

Melly, D.; Horta, Rodolfo; Münch, Cécile; Biner, Hans-Peter; Chevailler, Samuel

doi:10.1109/icelmach.2014.6960169

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…The optimal operation of the turbine is ensured by the relative rotational speed between the two runners along with their absolute rotational speed. Further, the runners are driven by two independent electrical generators specially designed for this turbine, Melly et al [23], placed into the upstream and downstream bulbs respectively. Two frequency converters are used to drive the variable-speed electrical generators at the desired constant rotational speed value, whatever the sign of the mechanical torque.…”

Section: Microturbine With Counter-rotating Runners-bulb Versionmentioning

confidence: 99%

A Dynamic Approach for Faster Performance Measurements on Hydraulic Turbomachinery Model Testing

et al. 2018

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During the design and optimization of hydraulic turbomachines, the experimental evaluation of hydraulic performances beyond the best efficiency point and for off-design conditions remains essential to validate the simulation process and to finalize the development. In this context, an alternative faster method to measure the efficiency of hydraulic turbomachines using a dynamic approach has been investigated. The so-called “sliding-gate” dynamic measurement method has been adapted and implemented on the hydraulic test rig of the HES-SO Valais//Wallis, Sion, Switzerland. This alternative approach, particularly gainful for small-hydro for which the investment devoted to development is limited, has been successfully assessed on two cases for drinking water networks energy recovery. A 2.65 kW double-regulated laboratory prototype of a tubular axial micro-turbine with two independent variable speed counter-rotating runners and a 11 kW multi-stage centrifugal pump-as-turbine (PAT) with variable speed have been selected. The hydraulic efficiency results obtained by dynamic measurements are compared to the ones obtained by the classical steady point-by-point method. This dynamic method, suitable not only for hydraulic machinery, allows: (i) reducing significantly (up to 10×) the time necessary to draw the complete efficiency characteristics of a hydraulic machine; (ii) rapidly detecting the hydrodynamic instabilities within the operating range of the machine.

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Section: Microturbine With Counter-rotating Runners-bulb Versionmentioning

confidence: 99%

A Dynamic Approach for Faster Performance Measurements on Hydraulic Turbomachinery Model Testing

et al. 2018

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“…Furthermore, the forward propeller generates a rotating flow that is absorbed by the after propeller, saving the energy up to 10% [5]. The contra‐rotating system is widely attained in wind power turbines [6], hydro turbines [7], air‐fans [8], pulse generators [9], submarine propulsion [10], aerial vehicles [11] etc.…”

Section: Introductionmentioning

confidence: 99%

Self‐compensation of torque reaction in an induction contra‐rotating propulsion motor

Hassannia

2022

IET Electric Power Appl

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Torque reaction is one of the most critical issues with current aerial and undersea vehicles. Contra‐Rotating Propulsion (CRP) systems are the most popular technique for compensating the torque reaction of floating vehicles. However, the unbalanced load conditions are inescapable in CRP systems, which eliminate the net zero torque reaction and impulse unwanted spinning on vehicle. A new single‐phase dual rotor axial flux induction motor has been investigated in this paper that has the ability of self‐compensate reaction torque against unbalanced loads. The proposed motor can eliminate the requirement for complicated torque reaction control systems. Finite element simulation shows the expected performance of proposed motor under unbalanced conditions. The simulation results have been verified by experimental testing of a motor prototype.

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“…To achieve higher performances, various types of PM generators have been proposed and used in hydropower applications [7–11]. In [7, 8], a new counter‐rotating PM generator (CRPMG) for drinking water networks has been developed. In [9], a design of an axial‐flux PM generator (AFPMG) for pico hydro power plants in remote areas has been discussed.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective optimisation of hydroelectric PMSG considering water‐level variation

Gao

Dai

Zhang

et al. 2019

J. eng.

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Development of a PM-generator for a counter-rotating micro-hydro turbine

Cited by 4 publications

References 6 publications

A Dynamic Approach for Faster Performance Measurements on Hydraulic Turbomachinery Model Testing

A Dynamic Approach for Faster Performance Measurements on Hydraulic Turbomachinery Model Testing

Self‐compensation of torque reaction in an induction contra‐rotating propulsion motor

Multi‐objective optimisation of hydroelectric PMSG considering water‐level variation

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