What is the biggest advantage to variable speed pump drives than other technologies?

Combining Smart Hydraulic System – SHS, users can achieve up to 70% energy savings, reduced noise and cooling needs and pump downsizing.

We ask it to these below guys:

Senior tech. Dept. And Inventor: There are three advantages variable speed drives offer the market— low noise, longer life and higher efficiency. Depending on what a particular customer’s needs are, low-impact noise could be a primary reason to incorporate a - SHS into a machine. Eaton’s pumps are capable of running down to zero rotations per minute, so reduced noise in the overall system—and better overall sound quality—are significant features.

Efficiency is a key driver that brought about - SHS variable speed drives solution, and there are several market influencers that have led to innovative hydraulic pump and system level technologies—government regulations and energy costs. Energy costs continue to increase over time, and government regulations are continuing to require fewer emissions, both of which have led machine builders to consider more efficient electric motor solutions. If hydraulic pumps cannot operate in the speed ranges needed to complement the wider speed ranges of - SHS motors, they can be replaced by electro-mechanical options.

Technical Assistant: I always want to jump to the energy savings because that sort of relates to the biggest cost right off, and that’s the payback. Average time for payback is about three to four years on a retrofit. On a new machine, it’s a lot quicker, anywhere between two and five years.