Design and Analysis of a Novel Speed-Changing Wheel Hub with an Integrated Electric Motor for Electric Bicycles

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="369504.fig.0012a" src="https://static.hindawi.com/articles/mpe/volume-2013/369504/figures/369504.fig.0012a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Low-speed gear (Gear I)</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="369504.fig.0012b" src="https://static.hindawi.com/articles/mpe/volume-2013/369504/figures/369504.fig.0012b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Direct drive (Gear II)</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="369504.fig.0012c" src="https://static.hindawi.com/articles/mpe/volume-2013/369504/figures/369504.fig.0012c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>High-speed gear (Gear III)</td></tr></table></td></tr></table>

<table>Power transmission path at each gear of the integrated device.</table>

Mathematical Problems in Engineering

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Figure 12

Figure 12: Design and Analysis of a Novel Speed-Changing Wheel Hub with an Integrated Electric Motor for Electric Bicycles 