Objectives of this Lecture ME350 Describe the factors that must be specified to select a suitable motor Describe the principles of operation of DC motors. Describe the general form of a motor performance curve. Describe the advantages and disadvantages of DC motors compared with AC motors. Describe four basic designs of DC motors,and describe their performance curves. 77 ME 350 Objectives of this Lecture • Describe the factors that must be specified to select a suitable motor • Describe the principles of operation of DC motors. • Describe the general form of a motor performance curve. • Describe the advantages and disadvantages of DC motors compared with AC motors. • Describe four basic designs of DC motors, and describe their performance curves