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US07709121B2 Method and apparatus for recirculating unused fuel in fuel cells 有权
燃料电池中未使用的燃料再循环的方法和装置

Method and apparatus for recirculating unused fuel in fuel cells
Abstract:
Unused fuel in a fuel cell is recirculated in the anode loop and combined with fresh fuel using an electromagnetically driven pump. The pump includes a magnetic rotor mounted inside a conduit of nonmagnetic material that recirculates the fuel, and a plurality of electric stator coils disposed around the outside of the conduit. The stator coils are powered by either a AC or pulse train signal produced by a controller, and generate synchronous electromagnetic forces that spin rotor to force the gas through the recirculation loop.
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