A NASA-patented voltage controller has been implemented in all sorts of load-bearing electrical machines, providing only the power needed to carry the weight onboard.
Many devices and machines that run on electricity — for example, escalators, moving sidewalks and elevators — require more or less power depending on the load they are carrying. A NASA-patented voltage controller has been implemented in all sorts of load-bearing electrical machines, providing only the power needed to carry the weight onboard. The device saves power and money, reduces wear and tear and lessens environmental impacts.
Read more: http://spinoff.nasa.gov/Spinoff2007/er_3.html
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