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In an automotive fuel pump system, a small DC motor is widely used to drive the pump. On the other hand it is well known that ethanol and other alternative fuel are seriously discussed due to oil shortage in future and environmental viewpoint. The fuel pump motor is installed in a fuel tank, so that the coil current is commutated in fuel, generally gasoline. So far the authors have been investigating...
In an automotive fuel pump system, a small DC motor is widely used to drive the pump. The motor is installed in a gasoline tank, so that the current is commutated in gasoline, and arc voltage and duration differ from that in air. In this research, we use carbon brush and carbon flat commutator. Under high commutation current and high inductance, arc duration is long and black parts damaged by arcing...
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