Electric Drive

Chapter 1. Introduction â" Electric Drive Components 1

1.1. Definition 1

1.2. Electric drive components 2

Chapter 2. Driven Bodies 5

2.1. Function of the driven body 5

2.2. Reference or rated running 5

2.3. Transient behavior 6

2.4. Specifications 7

Chapter 3. Transmission 15

3.1. Transmission types and characterization 15

3.2. Resolution 20

3.3. Speed adaptation 22

3.4. Dynamic behavior 23

3.5. Oscillatory torque 31

3.6. Position transfer 36

Chapter 4. Motors 41

4.1. Characterization 41

4.2. Rotating and linear motors 42

4.3. Induction motors 42

4.4. DC motors 54

4.5. Synchronous motors 62

4.6. Variable reluctance motors 73

4.7. Linear motors 75

4.8. Piezoelectric motors and actuators 81

4.9. Appendix â" BLDC motor characteristics 85

Chapter 5. Motors: Characterization 87

5.1. Characteristics 87

5.2. Scaling laws 89

5.3. Parametric expression 96

Chapter 6. Global Design of an Electric Drive 101

6.1. Introduction 101

6.2. Dynamic equations 102

6.3. Example 107

6.4. Conclusions 117

Chapter 7. Heating and Thermal Limits 119

7.1. Heating importance 119

7.2. Thermal equations 120

7.3. Energy dissipated at start-up 126

7.4. Cooling modes 130

Chapter 8. Electrical Peripherals 137

8.1. Adaptation 137

8.2. Sources 137

8.3. Voltage adjustment 138

8.4. Current adjustment devices 143

Chapter 9. Electronic Peripherals 149

9.1. Power electronic 149

9.2. Simple switch 150

9.3. H bridge 151

9.4. Element bridge 154

Chapter 10. Sensors 159

10.1. Functions and types 159

10.2. Optical position sensors 161

10.3. Hall sensors 163

10.4. Inductive position sensors 164

10.5. Resolver-type rotating, inductive, contactless sensors 168

10.6. Other position sensors 170

10.7. The motor as a position sensor 175

10.8. Sensor position 179

10.9. Current sensors 181

10.10. Protection sensors 183

Chapter 11. Direct Drives 187

11.1. Performance limits 187

11.2. Motor with external rotor 200

11.3. Example 203

Chapter 12. Integrated Drives 207

12.1. Principle 207

12.2. Realization 208

Symbols 213

Indices 217

Bibliography 221

Index 223