Design and Operation of Very Slow Speed Generators for a Bristol Cylinder Sea Wave Generating Device

Ngu, Sze Song; Dorrell, David G.; Cossar, C.

doi:10.1109/tia.2013.2294993

Cited by 8 publications

(4 citation statements)

References 26 publications

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“…In the dq-frame, the CTA control is equivalent to zero d-axis current. The CTA control is implemented by dq-transformation and implementation of a control system with several PI-controllers, see for instance [14,15]. In [15] experimental verification of a CTA-based control system for a linear machine is presented.…”

Section: Constant-torque-angle Controlmentioning

confidence: 99%

“…In [13], the performance of linear PM generators with different pole pitch is compared. In [14], constant-torque-angle (CTA) control is implemented for a wave energy converter with a rotating 248-pole generator. To the author's knowledge, no previous study has been performed on how to optimize the generator design for CTA control including a thorough investigation on how different parameters affect the performance.…”

Section: Introductionmentioning

confidence: 99%

“…CTA control has previously been implemented in wave energy converters. In [14] it is shown how CTA control can be implemented with PI regulators for a wave energy converter with rotating generator. In [15], a control system for an active rectifier with CTA control for a linear generator is simulated and verified experimentally.…”

Section: Introductionmentioning

confidence: 99%

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Design of Permanent-Magnet Linear Generators with Constant-Torque-Angle Control for Wave Power

Eriksson

2019

Energies

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This paper presents a simulation method for direct-drive permanent-magnet linear generators designed for wave power. Analytical derivations of power and maximum damping force are performed based on Faraday's law of induction and circuit equations for constant-torque-angle control. Knowledge of the machine reactance or the load angle is not needed. An aim of the simulation method is to simplify comparison of the maximum damping force, losses, and cost between different generator designs at an early design stage. A parameter study in MATLAB based on the derived equations is performed and the effect of changing different generator parameters is studied. The analytical calculations are verified with finite element method (FEM) simulations and experiments. An important conclusion is that the copper losses and the maximum damping force are mainly dependent on the rated current density and end winding length. The copper losses are inherently large in a slow-moving machine so special consideration should be taken to decrease the end winding length. It is concluded that the design of the generator becomes a trade-off between material cost versus high efficiency and high maximum damping force.

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Section: Constant-torque-angle Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of Permanent-Magnet Linear Generators with Constant-Torque-Angle Control for Wave Power

Eriksson

2019

Energies

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“…The brushed machine not only cause mechanical loss due to the friction between the carbon brushes and slip ring, but also the wear of the brushes can destroy the stability of the electric wave [8]. In terms of the ocean wave device, the generator should operate at a low speed [9]. Linear generators only absorb mechanical energy from unidirectional wave motion.…”

Section: Introductionmentioning

confidence: 99%

Design and Implement of Three-Phase Permanent-Magnet Synchronous Wave Generator using Taguchi Approach

et al. 2021

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In this paper, the design and performance analysis of a high-efficiency permanent-magnet synchronous wave generator (PSWG) are presented. A systematic approach for the design of the outer rotor was proposed as a prototype model. The magnetic field, magnetic circuit characteristics, electrical characteristics of the generator, and optimal design parameters such as the pole–arc ratio and shoe outer length were determined using the Taguchi method, finite-element analysis (FEA) software, and rotor skewing techniques. The proposed six series and six parallel-connection winding configurations can provide an evenly distributed current for practical applications. A PSWG was designed and fabricated according to the proposed methodology. According to the experimental results by implementing the optimized design, the efficiencies of the proposed PSWG which used 3.6 Ω load at 300 rpm is 86.32% and the efficiency error between simulation and experiment is less than 1.8%. It verifies the feasibility of the proposed method to PSWG and the structural reliability optimization design.

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A Fully Enclosed Multi-mode Wave Energy Converter Based on Cable Parallel Mechanism

Lu,

Yuan

2023

Mechanisms and Machine Science

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Design and Operation of Very Slow Speed Generators for a Bristol Cylinder Sea Wave Generating Device

Cited by 8 publications

References 26 publications

Design of Permanent-Magnet Linear Generators with Constant-Torque-Angle Control for Wave Power

Design of Permanent-Magnet Linear Generators with Constant-Torque-Angle Control for Wave Power

Design and Implement of Three-Phase Permanent-Magnet Synchronous Wave Generator using Taguchi Approach

A Fully Enclosed Multi-mode Wave Energy Converter Based on Cable Parallel Mechanism

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