A propulsive force generating device includes a parent body of rotation rotatably arranged, means for rotationally driving the parent body of rotation at a rotational angular velocity ω.sub.0, n (n≥1 integer) child bodies of rotation arranged on the body of rotation and having rotating axes in the circumferential direction of the parent body of rotation, and means for rotationally driving the child bodies of rotation at a rotational angular velocity ω.sub.1 by flexible binding. The rotational angular velocity ω.sub.0 and the rotational angular velocity ω.sub.1 have the same sign and satisfy the following numerical expression:

[00001]$\frac{2{\pi }^2}{n}{\omega }_0\le {\omega }_1$

A seesaw-type hydroelectric power generation device is provided, including an elongated container (10), a hydroelectric turbine module (20), a pivot structure (30) below the elongated container (10), and a jacking structure (40) placed on both sides of the pivot structure (30). The elongated container (10) includes a first compartment (13) and a second compartment (14), and a water flow passage (15) connecting them. The hydroelectric turbine module (20) includes an impeller (22) and a power generator (21), the impeller (22) disposed in the water flow passage (15). When force is applied to the elongated container (10), it tilts around the pivot structure (30). The working fluid (WF) flows reciprocally through the water flow passage (15), driving the impeller (22) to rotate and thus generating electricity. The electricity required to drive the elongated container is less than the electricity generated, allowing for the continuous generation of electricity.

A system to generate power, the system comprising a shaft configured for one-directional rotation around a horizontal axis, an inertial object coupled to the shaft where the inertial object has an uneven distribution of mass around the shaft, an electric generator configured to extract rotational kinetic energy from the shaft, and an electric motor configured to provide restorative energy to the shaft. The power generation method comprises steps of providing a power generation system, placing the shaft in an initial position, and inducing shaft rotation. Once shaft rotation is induced, the method alternates between steps of power generation and power consumption. More power is generated than consumed, resulting in a surplus of power supplied to the grid.

A seesaw-type hydroelectric power generation device is provided, including an elongated container (10), a hydroelectric turbine module (20), a pivot structure (30) below the elongated container (10), and a jacking structure (40) placed on both sides of the pivot structure (30). The elongated container (10) includes a first compartment (13) and a second compartment (14), and a water flow passage (15) connecting them. The hydroelectric turbine module (20) includes an impeller (22) and a power generator (21), the impeller (22) disposed in the water flow passage (15). When force is applied to the elongated container (10), it tilts around the pivot structure (30). The working fluid (WF) flows reciprocally through the water flow passage (15), driving the impeller (22) to rotate and thus generating electricity.

A system to generate power, the system comprising a shaft configured for one-directional rotation around a horizontal axis, an inertial object coupled to the shaft where the inertial object has an uneven distribution of mass around the shaft, an electric generator configured to extract rotational kinetic energy from the shaft, and an electric motor configured to provide restorative energy to the shaft. The power generation method comprises steps of providing a power generation system, placing the shaft in an initial position, and inducing shaft rotation. Once shaft rotation is induced, the method alternates between steps of power generation and power consumption