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2. Self-powered dynamic systems - Wikipedia

   en.wikipedia.org/wiki/Self-powered_dynamic_systems

   The concept of "self-powered dynamic systems" in the figure is described as follows. I. Input power (e.g. fuel energy powering a vehicle engine or propulsion system), or input excitation (e.g. vibration excitation to a structure) to the system. The source of this input energy can be of renewable energy source (e.g. solar power to a dynamic ...

3. Electric generator - Wikipedia

   en.wikipedia.org/wiki/Electric_generator

   An engine-generator is the combination of an electrical generator and an engine (prime mover) mounted together to form a single piece of self-contained equipment. The engines used are usually piston engines, but gas turbines can also be used, and there are even hybrid diesel-gas units, called dual-fuel units.

4. Freeplay Energy - Wikipedia

   en.wikipedia.org/wiki/Freeplay_Energy

   In present Freeplay radios and other products, clockwork mechanisms storing energy in a mainspring have now been replaced by small batteries charged by cheaper hand-crank generators. [9] Freeplay Energy produces a variety of consumer devices in addition to radios, including flashlights, lanterns, mobile phone chargers, and foot-powered generators.

5. Inverter-based resource - Wikipedia

   en.wikipedia.org/wiki/Inverter-based_resource

   An inverter-based resource (IBR) is a source of electricity that is asynchronously connected to the electrical grid via an electronic power converter ("inverter"). The devices in this category, also known as converter interfaced generation (CIG), include the variable renewable energy generators (wind, solar) and battery storage power stations. [1]

6. Free energy - Wikipedia

   en.wikipedia.org/wiki/Free_energy

   Free-energy relationship, a relationship in physical organic chemistry; Principle of minimum energy, a thermodynamic formulation based on the second law; Thermodynamic free energy, the energy in a physical system that can be converted to do work, including: Gibbs free energy; Landau free energy (also known as grand potential) Helmholtz free energy

7. Earth battery - Wikipedia

   en.wikipedia.org/wiki/Earth_battery

   The free electrons then flow into one electrode to a greater degree than in the other electrode, thereby causing electric current to flow in the external circuit through the load. The current flows from that plate whose position in the electropotential series is near the negative end (such as palladium). The current produced is highest when the ...