The motor cannot automatically store energy

What happens if an electric motor is not stored properly?

Without proper storage, the lifespan of the electric motor can decrease significantly. During periods of site inactivity or when stored as a spare, correctly storing an electric motor is critical to keep the motor well-protected and in good working order.

What's a suitable energy storage method for slow rotary motion?

For slow motion, the pneumatic motor may leak and store little or no energy. For "many many many rotations", a permanent magnet motor /generator -> DC rectifier -> battery (or supercapacitor) may work to store considerably more energy.

Can a rotary motor store more energy?

For fast rotary motion, a rotary motor could work to store energy, but for slow motion, a pneumatic motor may 'leak' and store little or no energy. For 'many many many rotations', a permanent magnet motor/generator -> DC rectifier -> battery (or supercapacitor) may work to store considerably more energy than a linear motor.

How does a pneumatic motor work?

A pneumatic motor works by converting potential energy from compressed air into rotational energy. When the motor spins, air is forced through a tube, one-way valve, and storage tank, compressing the air. When the valve is opened, the compressed air flows back through the tube and motor, spinning it in reverse.

What causes the motor to spin in reverse?

Opening the valve allows the compressed air in the tank (potential energy) to flow back through the tube and motor, spinning it in reverse. Spinning the motor causes air to be forced through a tube, one-way valve, and storage tank.

Does slow motion generate a lot of charge?

Similar to the pneumatic concept, slow motion will not produce much charge. However, the density of stored potential energy is much higher in batteries than in air tanks. There are significant losses in both of these systems, so there won't be enough energy stored to return the axle to its original starting position.