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This profile was last updated on 2/1/14  and contains information from public web pages and contributions from the ZoomInfo community.

Global Director of Advanced Engin...

Danfoss Power Solutions
Phone: (850) ***-****  HQ Phone
Email: j***@***.com
Local Address: Las Vegas, Nevada, United States
Danfoss Inc
1769 E. Paul Dirac Drive
Tallahassee , Florida 32310
United States

Company Description: Danfoss is one of the world's leading manufacturers of electronic and mechanical components and control systems for refrigeration and air conditioning, heating, and...   more

Employment History

Board Memberships and Affiliations


  • PhD
    University of Illinois at Urbana-Champaign
6 Total References
Web References
"Danfoss Power Solutions is ..., 1 Feb 2014 [cached]
"Danfoss Power Solutions is dedicated to being our OEM's strongest partner in mobile hydraulics," said Jeff Herrin, Global Director of Advanced Engineering Systems at Danfoss Power Solutions.
Equipment, Danfoss Power Solutions, Sauer-Danfoss, Fluid Power Exposition, Las Vegas, Jeff Herrin, Hydraulic System, Electrohydraulic, Design, Manufacturing
"Danfoss Power Solutions is ..., 1 Sept 2013 [cached]
"Danfoss Power Solutions is dedicated to being our OEM's strongest partner in mobile hydraulics," said Jeff Herrin, Global Director of Advanced Engineering Systems at Danfoss Power Solutions.
Energy Efficient Hydraulics and Pneumatics Conference, 23 Dec 2012 [cached]
Jeff Herrin Sauer-Danfoss
Jeff Herrin is currently the Global Director - Advanced Engineering Programs at Sauer-Danfoss, Inc. in Ames, Iowa. He joined Sauer-Danfoss in 1998 and has held roles of increasing responsibility within Product and Systems Engineering. Jeff completed his academic training in Mechanical Engineering at the University of Illinois at Urbana-Champaign with a PhD in 1993. He subsequently held research positions at NASA Langley Research Center and General Electric Corporate Research prior to joining Sauer-Danfoss. Recently, Jeff held positions on the Industrial Advisory Board and Executive Committee of the Center for Compact and Efficient Fluid Power (CCEFP).
Our Industrial Advisory Board | Center for Compact and Efficient Fluid Power, 8 April 2012 [cached]
Jeff Herrin | Sauer-Danfoss
Jeff Herrin, Director of ..., 23 April 2013 [cached]
Jeff Herrin, Director of Advanced Programs at Sauer-Danfoss Inc., Ames, IA, says commercial products based on this technology are in active development and will be available in specific markets in the coming years.
A Digital Displacement pump (DDP) is a hydraulic pump which uses the same core piston pumping principles as many of the commercial pumps currently available in the market, says Herrin. The difference, however, is in how the DDP is controlled. Output flow of a DDP is controlled by fast-acting electrohydraulic valves paired with each cylinder and piston in the pump. Herrin says a nine piston DDP, for example, will have nine active valves, one per piston, providing control of the pump. Traditional pumps, on the other hand, control output flow by varying the angle of a single swashplate which controls all of the pistons in the pump simultaneously.
"The electrohydraulic valves which control the pistons have to be very fast in order to provide the pump dynamics needed for most applications of hydraulic pumps," adds Herrin. Designing valves that are both very fast and able to pass a lot of flow through the valve body is not an easy task. "Those two requirements at the same time are a real challenge," he says. In addition, the large number of valves needed for every DDP makes it critical for developers of DDP technology to ensure reliability and robustness of the design in any kind of production environment. "But by resolving the challenges, there comes a lot of new benefits," says Herrin.
Why go DDP?
According to Herrin, improved operating efficiency is one of the biggest benefits to using DDP technology. "Digital Displacement pumps themselves, when compared to traditional pumps, offer significant improvements in efficiency, especially at part-load operating conditions," he says. Because they provide very fast, dynamic pump control, DDPs offer efficiency at a component level as well as a system level, which leads to overall machine efficiency benefits such as improved fuel economy.
The faster control response of a DDP enables it to provide more precise and repeatable flow and pressure control for applications that require it, such as robotics. Currently, many of these applications use high fidelity valves to provide precise control. By using a DDP instead, the high fidelity valve can be simplified which can help reduce costs for customers. Herrin says the potential cost reduction is not a matter of DDPs costing less than traditional pumps but rather their ability to help reduce overall system design costs. When a DDP is used in place of a traditional pump, other components can be simplified or even removed from the system without sacrificing functionality. "It's more of the system level bill of material and lifecycle costs comparison that become important and where benefits will be obvious to the OEM and also the end customer," says Herrin.
Because DDPs are such an efficient technology, they are also well suited for use in hydraulic hybrid drivetrains. "Due to their precise controllability and excellent operating efficiency, Digital Displacement pumps and motors are actually the ideal technology for hybrid drivetrains," says Herrin. Hybrids are designed to provide total operating efficiency of the machine over the duty cycle, and in order to achieve that, the most efficient components must be used. Herrin says at the moment, Digital Displacement is the most efficient pump and motor technology known to the industry.
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