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Table of content 1. Introduction and intention. 6 General. 6 2. History and basic principles of linear technology. 7 History. 7 3. Technical systems for linear movements. 8 General. 8 4. Pneumatic linear actuators. 9 Basic principles. 9 Function. 10 Constructions. 10 Calculations. 11 Test questions. 12 5. Hydraulic linear actuators. 13 Basic principles. 13 Functionality. 14 Constructions. 15 Calculations. 17 Test questions. 18 6. Electric linear actuators. 19 Basic principles. 19 Function. 20 Test questions. 22 7. Energetic comparison of the systems. 23 Technology selection. 23 Test questions. 26 4
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8. Electric linear actuators – Technology. 27 Technical presentation. 27 Motor. 27 Direct current motor. 27 Synchronous motor. 30 Asynchronous motor. 33 Servo actuators. 35 Test questions, part 1. 37 Gear. 38 Test questions, part 2 . 41 9. Linear actuators in practice. 42 Areas of use. 42 Test questions. 47 10.Actuator selection. 48 Specification and calculation. 48 Other parameters. 56 Test questions. 56 11.Closing statement. 57 Summary. 57 Bibliography. 58 Symbol directory. 59 Abbreviations. 62 Notes. 63 5
