noun
General term for mechanical or physical power that drives machines, vehicles, or systems. Often used in compounds like 動力源 (power source) or 動力機関 (power engine).
この工場は電力を動力として稼働している。
This factory operates using electricity as its power source.
The steam engine was the main motive power of the Industrial Revolution.
noun
three-phase electricity
Engineering term; specifically refers to three-phase alternating current as a power source. Often used in technical contexts such as 動力回路 (power circuit) or 動力線 (power line).
See also: 三相交流
工場の大型機械は動力で動いている。
The large machinery in the factory runs on three-phase electricity.