然而在磁回路的电机片和电枢之间有一个间隙，于是产生一个力，其作用是关闭这个间隙以完成这个磁回路。

There is however a gap in the magnetic circuit between the pole piece and armature so a force is created which ACTS to close this gap and complete the magnetic circuit.

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间距控制：为了最大限度地根据风速变化提升发电效率，新型风力发电机上的控制器每秒钟都能够对每一片风叶进行任何角度的调整。

Pitch controller: to maximize lift as the wind speed changes, a controller can automatically rotate each blade anywhere from a fraction of a degree to multiple degrees per second.

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人们对戈德博格的著名卡通片和19世纪20年代的波浪发电机都很好奇。

There's a curious resonance between Goldberg's famous cartoons and the wave motors of the 1890s.

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