Copyright Goodheart-Willcox Co., Inc. 251 13 Electric Motors 13.1 Basic Motor Construction 13.2 Basic Motor Operation 13.3 Split-Phase Motors 13.3.1 Resistance-Start, Induction-Run 13.3.2 Capacitor-Start, Induction-Run 13.3.3 Permanent Split Capacitor 13.3.4 Capacitor-Start, Capacitor-Run 13.3.5 Shaded-Pole Motor 13.4 Split-Phase Motor Starting Devices 13.5 Three-Phase Motors 13.6 Electronically Commutated Motors (ECMs) 13.7 Variable Frequency Drive Motors (VFDs) 13.8 DC Motors 13.8.1 Brushless DC Motors 13.8.2 Servo Motors 13.9 Hermetic Compressor Applications 13.10 Motor Protection After completing this chapter, you will be able to: • Discuss the basic construction of ac induction motors. • Explain the basic operation of ac induction motors. • Describe split-phase induction motors. • Explain how motor speed is determined. • Describe dual voltage motors. • Describe the shaded-pole motor. • Describe three-phase motors. • Describe the electrically commutated motor. • Describe the variable frequency drive motor. • Explain dc motors and its variations. • Describe hermetic compressor motor application. • Describe motor protection. Chapter Outline Learning Objectives Additional Reading Modern Refrigeration and Air Conditioning, 21st edition 15.1 Motor Structure 15.2 AC Induction Motors 15.3 Electronically Commutated Motors (ECMs) 16.2.5 Motor Starting Relays I. Pilon/Shutterstock.com