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Showing 1 to 8 of 8 for “"Pump/motor"”.
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Investigation of digital pump/motor control strategies
<p>A pump is the heart of fluid power systems, it has a significant impact on the efficiency of many fluid power systems. Motors are the most common rotary actuators in fluid power systems. State-of-the-art pump/motor units can achieve efficiencies higher than 90% when operating at maximum …
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Microgrid Laboratory Wind Energy Integration
… the islanded microgrid by turning on and off the pump motor load for one second and by adding a torque load.</p> <p>Without the wind energy system, the system frequency drops below 59.7Hz causing the microgrid to collapse. However, with the wind energy system, the microgrid frequency is kept above …
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Achieving Efficient Control of Hydraulic Systems Using On/Off Valves
… due in part to inefficient components, such as pumps and motors, and partially due to the typical method of control, which uses throttling valves to place restrictions in the flow path to dissipate excess power as heat. Several approaches to reducing throttling losses have been studied, such as …
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Analysis of Large Synchronous Motors Used In Hydro Pump Storage Plants.
… the past ten years, a widespread interest in pump storage peaking plants has developed in the United States. In particular during the past few years, The Southern Company has become very interested in this peaking method having one plant under construction and several others being studied. …
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An expert system for preliminary selection of hydrostatic transmission components
… selection and sizing of the major components-- pump, motor, and final drive-- of a hydrostatic transmission. Four types of options were considered. For the first, output speed and torque are both constant. For the second, horsepower output is constant at different speeds. For the third type, the …
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High Speed Rotary PWM On/Off Valves for Digital Control of Hydraulic Pumps and Motors
… control of fixed displacement hydraulic pumps and motors. On/off valves, the hydro-mechanical equivalent of transistors, enable the application of digital control techniques found in electrical systems to hydraulics. These techniques, such as pulse-width-modulation (PWM), have the …
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Štípací stroj na dřevo
Tato diplomová práce se zabývá návrhem štípacího stroje na dřevo včetně pevnostních a kontrolních výpočtů a návrhu jeho hydraulického obvodu. Pro návrh konstrukce je nutné zvolit maximální rozměry dřevěné kulatiny, které mají délku 1,1 m a průměr i přes 0,5 m. Konstrukce stroje je vertikální. Další …