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Line Force and Damping at Full and Partial Stator Overlap in a Linear Generator for Wave Power

机译：波浪发电机线性发电机全定子和部分定子重叠时的线路力和阻尼

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摘要

A full scale linear generator for wave power has been experimentally evaluated bymeasuring the line force and translator position throughout the full translator stroke. The measuredline force, in relation to translator speed, generator damping and stator overlap, has been studied bycomparing the line force and the damping coefficient, γ, for multiple load cases along the translatorstroke length. The study also compares the generator ’s behavior during upward and downwardmotion, studies oscillations and determines the no load losses at two different speeds. The generatordamping factor, γ, was determined for five different load cases during both upward and downwardmotion. The γ value was found to be constant for full stator overlap and to decrease linearly witha decreasing overlap, as the translator moved towards the endstops. The decline varied with theexternal load case, as previously suggested but not shown. In addition, during partial stator overlap,a higher γ value was noted as the translator was leaving the stator, compared to when it was enteringthe stator. Finally, new insights were gained regarding how translator weight and generator dampingwill affect the translator downward motion during offshore operation. This is important for powerproduction and for avoiding damaging forces acting on the wave energy converter during operation.
机译：通过测量整个转换器行程中的线力和转换器位置，已通过实验评估了用于波浪发电的全尺寸线性发电机。通过比较沿平移冲程长度的多种载荷情况下的线力和阻尼系数γ，研究了与变压器速度，发电机阻尼和定子重叠有关的测得的线力。研究还比较了发电机在向上和向下运动期间的行为，研究了振动并确定了两种不同速度下的空载损耗。在向上和向下运动期间，确定了五个不同载荷工况的发电机阻尼系数γ。发现γ值对于定子完全重叠是恒定的，并且随着平移器向末端挡块的移动，γ值会随着重叠的减小而线性减小。下降量随外部负载情况而变化，如先前建议但未显示。此外，在部分定子重叠期间，与进入定子的转换器相比，当转换器离开定子时，会注意到较高的γ值。最后，获得了关于在海上作业期间平移机重量和发电机阻尼将如何影响平移机向下运动的新见解。这对于发电和避免在运行期间作用在波能转换器上的破坏力很重要。

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