Electro Hydrostatic Actuation Highly efficient implement solution with energy recovery

Transcription

1 Electro Hydrostatic Actuation Highly efficient implement solution with energy recovery Dale Vanderlaan Outline Off Highway Technology Trends EHA Technology Journey Application Test Results Key Conclusions Sr. Program Mgr Advanced Systems Technology Hydraulics Group

2 Technology Trend Current State Machine Efficiency Challenges Hydraulic Efficiency Challenges Speed Coupled Systems Machine Focused Operator Fuel ICE Inefficient operating points Hydraulic distribution loss Pump spinning loss Confident load control Dynamic Braking Loss Power Source Mech Trans Power train Hydraulics Valve throttle loss

3 Technology Trend Future State Machine Hydraulics Speed Coupled Systems Power Coupled Systems ICE efficiency optimization Improve multi-function operation Reduce idle loss Optimal component efficiency Reduced distribution losses Machine Focused Operator Work Focused Operator Power on demand Adaptable controls Power on demand Improved controllability Dynamic Braking Loss Dynamic Braking Recovery Recover energy Store energy / reduce ICE size Energy recovery

4 Technology Trend Hybrid Electric Machine Power Coupled Systems Work Focused Operator Dynamic Braking Recovery Motor / generator Power Electronic Converter Constant DC voltage bus? Power on demand Adaptable controls Seamless power management Energy storage

5 Technology Trend Hybrid Electric ICE Power = Torque x Speed 3ΦAC Power = Arms x Vrms Common DC Bus Power = Vdc x Adc Bus Voltage Set-point M/G Power Train M/G M/G Hydraulic Implement Functions Net System Current M/G Accessories Steering, fans, cooling, compressors Infinitely Variable Transmission

6 Technology Trend Hybrid Electric ICE Power = Torque x Speed 3ΦAC Power = Arms x Vrms Common DC Bus Power = Vdc x Adc Bus Voltage Set-point M/G Power Train M/G M/G Hydraulic Implement Functions Net System Current M/G Accessories Steering, fans, cooling, compressors Infinitely Variable Transmission

7 Fuel Savings, Productivity, Controllability EHA Technology Journey? System Value Selection Criteria Strategy Minimum Change Fuel savings Productivity Safety Total Cost of Ownership 7 System Configuration Complexity, Cost

8 EHA Technology Journey? Energy Recovery Component Efficiency Distribution Losses Power On Demand Advanced Controls Continuum 8 Distributed, LS Hydraulics System Configuration Full Power On Demand

9 EHA Technology Journey EHA Technology Controller MG Motor Speed Torque Direction = Electrical Pump Flow Pressure Direction Cylinder Speed Force Direction Fixed displacement, variable speed Closed loop, hydrostatic = Servo inverter & electric motor Mode select manifold Mechanical Controller, machine interface Energy Recovery 4 Q Control

10 Cylinder Retract EHA Technology Journey EHA Technology To other functions +F -F Energy From Source Resisting Load -F, -V Controller Controller Controller MG Controller MG -F, +V +V -V Cylinder Extend DC bus 4 Q Control + / - Net Power Source & Storage Aiding Load Energy To Source

11 EHA Technology Journey Electro Hydraulic Pump Controller MG Controllers Hydraulics Pumps Inverters Electro Mechanical Motors

12 EHA Technology Journey 3 Function EHA EHA Technology DC Bus Machine Comm Return Source

13 EHA Verification Lab Testing Application Testing Reach Stacker Wheel Loader

14 EHA Verification Application Test Results Load Sense Hydraulics Torque x Speed Energy Baseline System 3 Function Output 350 bar, 350 lpm 100 kw Force x Speed Energy EHA with Energy Recovery Volts x Amps Energy DC AC DC AC MG MG MG EHA System Efficiency Metric Cylinder Energy Out Energy In Energy Recovered 14

15 EHA Verification Power Kw Application Test Results 175 Multi function Total 3 Function Output Multi function 0-75 Total Recoverable Input 30s Work Cycle

16 EHA Verification Energy Kwhr Application Test Results System Work Cycle Kwhr Baseline %Eff Metric Kwhr EHA %Eff Metric % % Transport 9 Kw 5 Kw Idle 1.5 Kw.2 Kw % Improvement %Eff Metric or % Kw 77% 44% 87% 1.0 Significant fluid heat reduction 30s Work Cycle Reduce thermal management energy

17 EHA & Off Highway Hybrid Electric Significant benefits with power coupled systems Hybrid Electric is an effective approach Match hydraulic system solution to value objectives Proven, highly efficient EHA technology delivers Power on Demand Efficient multi-function operation Energy recovery Improved controllability