Electrical Machines and Equipment
Electrical Machines and Equipment
Electrical Machines and Equipment
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<strong>Electrical</strong> Technology Department<strong>Electrical</strong> <strong>Machines</strong> & <strong>Equipment</strong>sDetailed Theoretical ContentsHours Contents Related Tasks91- Single-phase induction motors: Construction Types of single-phase induction motors <strong>and</strong> methods ofstarting:a- Split-phase motorsb- Capacitor start motorsc- Capacitor run motorsd- Capacitor start capacitor run motorse- Shaded pole motors Forward <strong>and</strong> backward fields Theory of operation Equivalent circuit Torque speed relation Losses <strong>and</strong> efficiency Applications of single phase induction motorsB1, C1, C2, C3,C6, D5, D8, D9,E1, E3, E4, E7, E8,E9, J1, J2, J4, J5,J662- Stepper motors:1. Types of stepper motors: Salient pole permanent magnet<strong>and</strong> hybrid2. Construction <strong>and</strong> theory of operation3. Calculation of step angles Logic tables for the control circuit for both forward <strong>and</strong>backward rotations Applications of stepper motorsB1, C1, C2, C3,C6, D5, D8, D9,E1, E3, E4, E7, E8,E9, J1, J2, J4, J5,J663- Tacho-generators: Types of tacho-generators:a- DC tacho-generatorsb- Induction type tacho-generatorsc- Synchronous tacho-generators Construction <strong>and</strong> theory of operation. Reasons for the errors in the readings of tacho-generators Calibration of tacho-generatorsB1, C1, C2, C3,C6, D5, D8, D9,E1, E3, E4, E7, E8,E9, J1, J2, J4, J5,J6- 69 -
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