A hydropower generator using a Ferris wheel, comprising:
- opposite supports having a predetermined height from a ground to provide a support base of a main rotational shaft;
- the main rotational shaft installed under the strong support base at an upper end between the opposite supports;
- a rotor rotating at a predetermined rotating speed in a predetermined radial range with respect to the main rotational shaft;
- a plurality of water buckets which are arranged around a periphery of the rotor at equiangular intervals to repeat filling and emptying each of the plurality of water buckets while the rotor rotates with respect to the main rotational shaft, wherein each of the plurality of water buckets is configured to always maintain horizontal level during rotation, each of the plurality of water buckets is filled with a predetermined amount of water to have a weight when placed at a top center of rotor during rotation while each of the plurality of water buckets is emptied by pouring out the water when placed at a bottom center of the rotor, and the weight is removed by pouring out the water;
- a selective water supply device that supplies water drawn from a river or stream to each of the plurality of water buckets located in a center of an upper portion of the rotor, wherein, after completely filling one of the plurality of water buckets with water, the selective water supply device stops water discharge temporarily until the next bucket of the plurality of buckets is positioned;
- and
- a generator installed on one side of the main rotational shaft disposed in a center of the rotor to convert rotational kinetic energy output from the rotor into electrical energy,
- wherein the selective water supply device comprises:
- a waterway unit to draw water from a river or stream, as well as a water down-drawing pipe at one side of the waterway unit to draw water downward from the waterway unit;
- a water input pipe installed on a lower portion at a predetermined interval from the water down-drawing pipe, wherein the water input pipe is provided with a guide block that can move horizontally while being engaged with a horizontal transport rail;
- a flexible element including a flexible hose or a corrugated pipe connected between the water down-drawing pipe and the water input pipe, wherein the water input pipe is connected by the flexible element and a support member separately constructed on one side of the water input pipe with transport means capable of moving a position of the water input pipe in a horizontal direction by a predetermined interval and then turning back to the original position, and wherein the transport means includes the horizontal transport rail configured on the support member which can be separately constructed;
- a locking member that protrudes on a front side or a rear side of the water input pipe,
- a contact lever member on a front wheel-shaped outer frame and a rear wheel-shaped outer frame corresponding to the locking member, wherein contact is released due to a change in height appearing in a process of pushing the locking member in a rotating direction when moving in an arc depending on the rotation of the rotor and then moving in an arc section;
- and
- a resilient return-spring between the water input pipe and the support member, wherein the water input pipe and the support member are both maintained at a predetermined interval to allow the water input pipe to be returned to a predetermined position thereof after movement thereof.