Realistic loss modelling and minimisation in an air-cored permanent magnet generator for wind energy applications

Subiabre, Estanislao J. P. Echenique; Mueller, Markus; Bertényi, T; Young, Thomas

doi:10.1049/cp.2012.0324

Cited by 4 publications

(5 citation statements)

References 5 publications

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“…According to literature review, some references such as [24][25][26][27] have mentioned the shift of MPP in wind energy conversion systems. Reference [24] has considered a 20 KW wind turbine connected to a permanent magnet synchronous generator (PMSG), where the stator terminals are connected to a diode rectifier and a 3phase voltage source inverter.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…The loss model, however, is simple and it does not consider the converters losses and the effect of harmonic terms (caused by diode rectifier) on machine losses. Reference [25] has used a similar topology as [24] but it replaces the synchronous machine with an air-cored PMSG. It proposes an equivalent circuit for the loss calculation of air-cored PMSG.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Where K v is the exponent of voltage dependency (IGBT ̴ 1.2…1.4; Diode ̴ 0.6) and TC sw is temperature coefficient of switching losses (IGBT ̴ 0.003; Diode ̴ 0.005 …0.006) [38]. In (25), the subscript ref is related to nominal test conditions which are known in the device datasheet. Noting to (24), (25) and assuming that the machine current is sinusoidal, i.e., I s =|I s |sinα, the corresponding average turn-on loss term in a fundamental cycle can be obtained as…”

Section: Machine Side Converter Lossmentioning

confidence: 99%

“…In (25), the subscript ref is related to nominal test conditions which are known in the device datasheet. Noting to (24), (25) and assuming that the machine current is sinusoidal, i.e., I s =|I s |sinα, the corresponding average turn-on loss term in a fundamental cycle can be obtained as…”

Section: Machine Side Converter Lossmentioning

confidence: 99%

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Evaluation of loss effect on optimum operation of variable speed micro-hydropower energy conversion systems

et al. 2019

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This paper evaluates the effect of converter and generator losses on the maximum power point (MPP) of variable speed micro-hydropower energy conversion systems. As a case study, a semi-Kaplan micro-hydropower turbine with a permanent magnet (PM) generator and a back-to-back full converter is considered. Using the analytical model, different loss terms, such as converter losses, PM generator losses and mechanical losses are calculated at different shaft speeds. Then, the curves of turbine power and injected power to the grid are extracted as a function of turbine speed. It is shown that the maximum attainable power of the variable-speed hydropower system does not correspond to the MPP of hydraulic turbine. In other words, to get the maximum power from the whole hydropower system, it is necessary to consider power losses of the electric generator and power electronic interface between the turbine and the grid. These power losses can change the power-speed characteristics or MPP location of the hydropower system. According to this fact, the conventional MPP tracking (MPPT) algorithms which try to track the MPP of hydraulic turbines fail to extract the maximum power. Hence, a modified perturb and observe (P&O) MPP tracking algorithm is proposed for the variable speed hydropower systems to increase their efficiency. The modified tracking algorithm finds the "optimum MPP" automatically and without the extra calculations. Also, the injected power to the grid is increased 3.7% when the modified algorithm is applied to the studied case study. Finally, the validity of theoretical claims is verified by experimental tests on a 5 kW hardware prototype.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Machine Side Converter Lossmentioning

confidence: 99%

Section: Machine Side Converter Lossmentioning

confidence: 99%

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Evaluation of loss effect on optimum operation of variable speed micro-hydropower energy conversion systems

et al. 2019

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“…The motor is assumed to operate in the optimum brushless DC mode, i.e. Is in phase with Ea, so that the electromagnetic power and torque can be obtained by: (15) where φ is angle between phasors Ea and Is, and in the optimum brushless DC mode, φ=0.…”

Section: Performance Analysis Based On the Proposed Equivalent Cirmentioning

confidence: 99%

An Equivalent Circuit Model for Predicting the Core Loss in a Claw-Pole Permanent Magnet Motor With Soft Magnetic Composite Core

Guo

Zhu

et al. 2018

IEEE Trans. Magn.

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Soft magnetic composite (SMC) materials and SMC electromagnetic devices have attracted strong research interest in the past decades. However, SMC devices have large core loss, which needs to be put into consideration even at the design stage. Effective and accurate prediction of core loss becomes crucial for design and optimization of high-performance motors with these materials. Equivalent circuit model is a widely used method for machine analysis, due to the advantages in fast calculation with clear physical mechanism. This paper presents an equivalent circuit model to predict core losses of a claw pole permanent magnet motor with an SMC stator core. All the parameters including core loss resistance in the equivalent circuit model are identified based on finite element method to achieve high accuracy, and the effectiveness of the parameters identification method is experimentally verified. The proposed equivalent circuit model can predict core loss and motor's performance efficiently both in no-load and loading conditions.

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Robust Control and Harmonics Modeling of a PMSG for a 1.5 MW Wind Turbine

Gallas

Ballois²,

Aloui

et al. 2020

2020 International Conference on Electrical Machines (ICEM)

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Realistic loss modelling and minimisation in an air-cored permanent magnet generator for wind energy applications

Cited by 4 publications

References 5 publications

Evaluation of loss effect on optimum operation of variable speed micro-hydropower energy conversion systems

Evaluation of loss effect on optimum operation of variable speed micro-hydropower energy conversion systems

An Equivalent Circuit Model for Predicting the Core Loss in a Claw-Pole Permanent Magnet Motor With Soft Magnetic Composite Core

Robust Control and Harmonics Modeling of a PMSG for a 1.5 MW Wind Turbine

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