Top: A photograph of two streams of water running into buckets and producinng DC current. Bottom: A photograph of a three-stream water running system that produces AC current.
Extension of Kelvin’s 2-stream high voltage DC self-excited water dynamo to 3 streams creates a three phase AC high voltage self-excited water dynamo. The water droplets pass through electrostatic induction charging rings and are then collected in barrels. Each ring is connected to the water in a neighboring barrel. The spontaneous buildup of low frequency alternating charge on the streams is evident from their oscillating spreading and collapse.(Images courtesy of Education Development Center, Inc. Used with permission.)