Page 10 - Mechatronics with Experiments
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viii CONTENTS
7.5.4 Example: A Multi 8.1.2 Electric Fields and
Function Hydraulic Magnetic Fields 610
Circuit using 8.1.3 Permanent Magnetic
Post-Pressure Materials 622
Compensated 8.2 Energy Losses in Electric
Proportional Valves 482 Motors 629
7.5.5 Directional, 8.2.1 Resistance Losses 631
Proportional, and 8.2.2 Core Losses 632
Servo Valves 484 8.2.3 Friction and Windage
7.5.6 Mounting of Valves in Losses 633
a Hydraulic Circuit 496 8.3 Solenoids 633
7.5.7 Performance 8.3.1 Operating Principles of
Characteristics of Solenoids 633
Proportional and Servo 8.3.2 DC Solenoid:
Valves 497 Electromechanical
7.6 Sizing of Hydraulic Motion Dynamic Model 636
System Components 507 8.4 DC Servo Motors and Drives 640
7.7 Hydraulic Motion Axis Natural 8.4.1 Operating Principles of
Frequency and Bandwidth Limit 518 DC Motors 642
7.8 Linear Dynamic Model of a 8.4.2 Drives for DC
One-Axis Hydraulic Motion Brush-type and
System 520 Brushless Motors 650
7.8.1 Position Controlled 8.5 AC Induction Motors and Drives 659
Electrohydraulic 8.5.1 AC Induction Motor
Motion Axes 523 Operating Principles 660
7.8.2 Load Pressure 8.5.2 Drives for AC
Controlled Induction Motors 666
Electrohydraulic 8.6 Step Motors 670
Motion Axes 526 8.6.1 Basic Stepper Motor
7.9 Nonlinear Dynamic Model of Operating Principles 672
One-Axis Hydraulic Motion 8.6.2 Step Motor Drives 677
System 527 8.7 Linear Motors 681
7.10 Example: Open Center 8.8 DC Motor: Electromechanical
Hydraulic System – Force and Dynamic Model 683
Speed Modulation Curves in 8.8.1 Voltage Amplifier
Steady State 571 Driven DC Motor 687
7.11 Example: Hydrostatic 8.8.2 Current Amplifier
Transmissions 576 Driven DC Motor 687
7.12 Current Trends in 8.8.3 Steady-State
Electrohydraulics 586 Torque-Speed
7.13 Case Studies 589 Characteristics of DC
7.13.1 Case Study: Multi Motor Under Constant
Function Hydraulic Terminal Voltage 688
Circuit of a Caterpillar 8.8.4 Steady-State
Wheel Loader 589 Torque-Speed
7.14 Problems 593 Characteristic of a DC
Motor Under Constant
CHAPTER 8 ELECTRIC Commanded Current
ACTUATORS: MOTOR AND DRIVE Condition 689
TECHNOLOGY 603 8.9 Problems 691
8.1 Introduction 603
CHAPTER 9 PROGRAMMABLE
8.1.1 Steady-State
LOGIC CONTROLLERS 695
Torque-Speed Range,
Regeneration, and 9.1 Introduction 695
Power Dumping 606
