This site is operated by a business or businesses owned by Informa PLC and all copyright

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC’s registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726. Traditionally, hydraulic pumps on utility, front-end and backhoe loaders, excavators, work trucks, cranes, and other mobile equipment have been driven by the machine’s diesel or gasoline engine, generally through a power takeoff (PTO). The constantly-running engine can be a problem on equipment used in residential areas, near hospitals, or other places where noise is a concern. Moreover, an always-running engine adds up to substantial operating and maintenance costs. Combining a fixed-displacement pump with a variable-speed electric motor can provide efficiency in the 96% range because it enables the pump to run at the speed the application requires at the time instead of running an engine at full speed and using valves or other controls to govern pump output. But until recently, limitations in battery technology and high costs have made it impractical to use variable-speed electric pump drives in mobile equipment, especially with fully-electric vehi...

This site is operated by a business or businesses owned by Informa PLC and all copyright

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC’s registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726. The millennium pump, shown in combined schematic-block diagram form in Fig. 1, consists of the basic electronically stroked pump kernel, plus several sensors used for control and diagnostics. The pump kernel for bus use is nothing more than the universal, electronically controlled, variable-displacement pump itself. We will examine the pump not as a component, but in the context of the system to which it must adapt. The elements in Fig. 1 form the framework for that look. The communications interface performs the connection between the pump assembly and the enterprise-wide communications bus. The pump has a single input from the control computer that will allow the pump to be configured in any of several ways. By selecting different control algorithms in the control computer, the pump can act as a The electromechanical interface will undoubtedly be a coil of some type (torque motor, force motor, or proportional solenoid) that requires a substantial cur...