Page 6 - Parker - Energy saving technologies or motor driven hydraulics

Variable Speed Hydraulic Solutions

Application Description Features

System receives Q (flow) command, with adjustable ■ Ready to install
Q (pump output flow)
control P (pressure) limit. An efficient alternative to a relief “Packaged Drive”
valve. May be run as an open loop system. solutions available
System receives P command, with programmed Q
limit. Pump maintains a pre-set pressure, while flow ■ Simple parameter
P (system pressure) follows the system demand, making a fixed displace- setting and adjustment
control ment pump simulate a variable flow pressure com-
pensated pump. An efficient alternative to a relief ■ One common
valve. programming software
System is capable of reducing pump RPM during package for all drive
Energy Saver for pressure compensating and low flow periods in order to save series, and provided at no
compensated pumps charge
energy.
Single pump with VFD is an alternative to traditional ■ Multiple communication
Hi/Lo control High/Low two pump systems. Operates as pressure protocols for easy
limit, with flow following system demand. integration, unattended
An energy saving control mode, an alternative to operation, and remote
Accumulator charging pump unloading or frequent across the line starting monitoring
when accumulator is full.

Benefits with Parker VFD
• Standard pumps can be used - fixed or variable displacement
Selection of system components • Works with 230-460VAC supplies
• Runs three phase motor from single phase supply (limited HP range)
• Longer motor service life, with unlimited starts per hour
• Less strain on the hydraulics, oil, and other components
Smooth acceleration and braking
• No power surges, no pressure surges (cavitation)
• Quick response to change in demand
• Savings on energy consumption, reduced peak power need
Higher efficiency • Reduced CO emissions
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• Less oil heating/reduced need for cooling
• Smaller pumps and coolers needed
Compact dimensions • System takes up less floor space
• Reduced hydraulic oil volume
• Less need for noise protection
• Improved work environment
Reduced noise levels
• Reduced motor shaft rotations
• Smoothed resonant frequencies
• Less external hardware
• Simple customization, pre-engineered packages available
Integrated concept
• Fieldbus options (Profibus, CAN, Ethernet, DeviceNet, etc.)
• System visualization
• Higher overall system efficiency
• Increased productivity through higher motor speed
Frequency control
• Variable volume flow for constant speed pumps across a wide range
• Simple process diagnostics

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