Systems Engineering and Electrification in Fluid Power Franzoni.pdfElectrification in Fluid Power...
Transcript of Systems Engineering and Electrification in Fluid Power Franzoni.pdfElectrification in Fluid Power...
Systems Engineering and Electrification in Fluid Power
June 4, 2019
Germano FranzoniGlobal Mobile SystemsChicago, IL
Overview of current state and future opportunities
Outline
• Systems engineering overview• Examples of traditional sys. engr. activity
• Circuit generation• Simulation to support projects• Baseline and energy mapping
• Electrification of mobile equipment• Overview (mini construction)• Parker approach to electrification• Example
• Conclusion2
• Discipline of Fluid Power Engineering• Design and control of hydraulic circuits
• Knowledge of• Hydraulic components• Controls and programming• Machines, applications
Systems Engineering
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Systems Engineering at Parker (GMS)
• Organization overarching multiple divisions and groups
• Represent multiple technologies• Support customers (OEMs) for next generation
systems• Global organization• US location: Chicago, 4000 m^2 test and
development lab • Outside GMS scope
• Design components4
Secular trends
• Consolidation of hydraulic suppliers • Leaner engineering and testing resources at OEMs
– help needed• New trends develop cross technology applications
(Electrification)
• Baby boomers are all retiring, new generations not attracted by hydraulics
• Lack of hydraulic engineering talent
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TRADITIONAL SYSTEMS ACTIVITY
Projects
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Example of system projectGOAL: develop a front and rear steering circuit for a vehicle inclusive of emergency steering pump
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LS primary pump –
engine driven
LS secondary pump – ground
driven
Control manifold
Front and rear steering gears
Secondary pump engagement
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LS primary pump
LS secondary pump
Margin sensing valve:
- If primary pump is OK LS2 = 0
- LS2 engaged only if margin of P1 collapsesMargin
sensing valve
Simulation used to support OEM
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Shaftfailure
Energy mapping – system optimization• Testing in our proving ground• Baseline: analyze losses and suggest improvements
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Useful engergy boom1.41%
Useful engergy dipper15.55%
Useful energy bucket10.42%
Useful energy swing3.12%
Lowering loss boom10.39%
Lowering loss dipper1.44%
Lowering loss bucket0.59%
Lowering loss swing1.44%Meter out loss boom
2.11%Meter out loss dipper
5.63%
Meter out loss bucket3.29%
Meter out loss swing2.01%
Simultaneous operation of functions
33.89%
Margin loss8.73% Useful energy:
30.5%
Energy mapping – system optimization• Simulation is again used to propose system
improvements
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ELECTRIFICATION OF MOBILE EQUIPMENT
Innovative trend and opportunities
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Compact construction equipment
• Why?
• Upcoming regulations:• Zero emissions (historical downtowns, indoor)• Low noise (no engine)
• Sweet spot for power density of Electric motors• Battery is still affordable• The Elon Musk factor….
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Mobile ElectrificationEngineering challenge with significant revenue potential
• Battery, Motors, Inverters are the cost drivers• Need of efficient or smart systems• Combination of multiple technologies requires
skills• Component Integration
Opportunity for Systems Engineering!14
Electrification at Parker
• GVM PMAC Motors • Established market leader position
• GVI inverters (recently launched)• Multiple pump technologies• Cooling technologies
2 Parker teams:• GMS: Machine testing, circuit design• MTC: Technology development,
component integration15
Mobile Electrification
• Different levels of impact on a system design• Energy recovery is an opportunity• What is the best solution?
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Combination EHP & Electro Hydrostatic Actuation
Control Valve
ControlValve
EHP EHP
Control Valve
EHP
Control Valve
EHP EHAEHP EHA
Valve
EHA
ValveValve
Energy Recovery
EHP per functionAll EHADual EHPSingle Electro Hydraulic Pump
EHA
Valve
Increasing Performance / Efficiency / Complexity / Cost
EHA
Valve
Continuum of Solutions
Hydraulic Power Distribution
Electric Power Distribution
Parker Approach – two solutions
1) Electro Hydraulic Actuator (EHA)
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2 quadrant
4 quadrant
• No metering losses• No overproduction• Energy recovery possible
Parker Approach – two solutions
2) Electro Hydraulic Pump-Valve (EHP)
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• Multiple valve technologies possible
• Less efficient than EHA• No energy recovery
• No need to have 1 motorand 1 inverter per function
Example: skid steer loader
Drive
Aux
Lift
Bucket
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Tandem hydrostat
Open circuit pumpsMain control Valve
High demand functionNo energy recovery
Recovery potentialInterference with bucket
Interference with boomNo energy recovery
FCT Currently Observations
Example: skid steer loader
Drive
Aux
Lift
Bucket
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Tandem hydrostat
Open circuit pumpsMain control Valve
EHP
EHA
EHP
FCT Currently Electric version
E. Motor with planetary
Electrification is not only power
Additional challenges:
1) Cooling: air, hyd. oil, water glycolDifferent cooling types have pros and cons
2) Pilot generation
3) Other aux functions (AC, ….)
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Conclusion
• Systems Engineering• Discipline focused on circuit design and controls
• Example of traditional approach• Simulation and baseline testing support
• New trends in electrification• Require cross-technology approach• New methods for system design
• Secular and recent trends in favor of Syst. Engr.
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