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ABE 463: Electrohydraulic Systems

ABE 463: Electrohydraulic Systems. Introduction and Basic Concepts. Hydraulic Power. Goals of this Lecture. Course preview Expectation communications Basic concepts introduction. Course Goals. Through the study of this course, you are expected to be able to:

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ABE 463: Electrohydraulic Systems

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  1. ABE 463: Electrohydraulic Systems Introduction and Basic Concepts

  2. Hydraulic Power

  3. Goals of this Lecture • Course preview • Expectation communications • Basic concepts introduction

  4. Course Goals Through the study of this course, you are expected to be able to: • explain how a typical electrohydraulic system works; • create schematics of electrohydraulic system using standard symbols; • design simple electrohydraulic systems; • model valve controlled electrohydraulic systems; • analyze performances of valve controlled E/H systems; and • design simple controllers for valve controlled E/H systems.

  5. Course Outlines

  6. Learning Expectation & Assessments [A, B, C, D, F] = [900, 800, 700, 600, 0]

  7. Three Power Transmission Methods • Mechanical • Electrical • Fluid • multiplies forces • constant torque at all speeds • can work remotely and around corners

  8. Advantages of Hydraulic Power • Variable Speed • Actuators can be driven from a high to low speed using a flow control valve. • Reversible • Hydraulic actuators can be instantly reversed in direction of motion. • Overload Protection • A pressure relief valve protects a hydraulic circuit from overload. • Also, a pressure relief provides a set clamping force. • Can Be Stalled • A load can stall a fluid power circuit without damage.

  9. An Overview of Off-road Equipment

  10. A Typical Hydraulic Power System M M

  11. Components of Hydraulic Systems Fluids Conditioning Hydraulic Systemsmaintenance Hydraulic Fluids Fluids Conditioning Power Regulation Power Absorbing Device Power Storing Device PowerRegeneration Device Power Deployment Hydraulic Cylinders & Motors Hydrostatic Power Transmission Power Distribution Control of Hydraulic Valves Electro-hydraulic Valves Hydraulic Valves & Lines Power Generation Hydraulic Pumps Control of Hydraulic Pumps Core Knowledge Base

  12. Fluid Power Energy Transmission • vo, Fo • P1,Q1 • P4 Q4 • ni, Ti • M PM-in PH-in • no, To PH-out PM-out • EnergyLevel

  13. Example of Hydraulic Systems

  14. Example of System Schematics

  15. Power Generation Component Symbols

  16. Power Distribution Component Symbols

  17. Power Deployment Component Symbols

  18. Power Regulation Component Symbols

  19. Fluid Conditioning Component Symbols

  20. Lecture Summary • Introduced course goals and expectations • Introduced a few basic concepts: • Typical hydraulic systems • Core knowledge bases • Energy transmission process • Commonly used symbols used in hydraulic system schematics

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