Recover energy from gravity

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I tested with a spring, it's easy to sum the energy. First scene without spring, the system lost energy. With a spring the system won energy. A torque is apply to circle, the same torque is apply to stem but moment of inertia are not the same and like energy win/lost is torque by angle of rotation, the system can win energy. I added force on circle because frequency don't must to be high, in this case there are a lot of vibration.

With specific velocity (x,y) the system with 2 arms and an axis give energy. Arms are attrack with gravitational forces.

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Maybe I can use this last technic with this example. The idea is to accelerate an inertial mass with a motor. All energy consume by motor is in mass in rotation. The motor accelerate only rear bottom green pole from magenta pole ant front top green pole from another magenta pole, the rotor has always Fr/-Fr and turn around its axis of rotation and the stator has Fs/-Fs and turn around axis X. Radius r2 > r1 so the torque on stator is not the same. Magenta pole is fixed to stator.

For the stator it's not more difficult to repuls green pole even it rotates in the contrary direction because the rotor rotates perpendiculary to axis X.

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For the last case, angular velocity around axis X can be fixed at w rd/s if an external system (not drawn) recover energy in the same time. No rolling element in the last idea, let rotor change its axis. Or with a rooling element in the center of rotor. With rolling element in the center of the rotor, all forces cancel themselves, at final there are only 2Fr that increase more and more angular velocity of rotor and 2Fs that give torque to external system for recover energy.

3 last images: slope the motor and give forces from magenta to green poles. Fr forces rotates only rotor around its axis and Fs forces rotates around axis red (X).

With a motor parallel to the axis X, with an inertia very high for the rotor, I apply a torque small, small enough for don't change a lot the angular velocity of rotor around its axis. If the angular velocity around axis X is high, the energy win is Torque by angle, but the energy needed is very low.

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270 W

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Frequency don't change the final result, even the time to reach 14000 J is the double.