CH6
Chapter 6 · Case studies and the mini-project
The principles of Chapters 1–5 across industry: reversing mills, arc furnaces, kilns, drilling and winders; what surrounds the drive (harmonics, cables, protection, availability, commissioning); and the capstone mini-project with its rubric.
6 lessons· 165 min
- 01Mills, furnaces, kilns and drilling rigsThe principles of Chapters 1–5 across heavy industry: the reversing mill's regenerated energy (eq. 6.1), the arc furnace, the cement kiln and its inching drive, the drilling draw-works, and the map of Table 6.1.30 min
- 02Winders and web tension: constant powerPaper, film, textiles and glass: holding web tension as the roll diameter changes, the winder law (eq. 6.2), the constant-power range it asks of the drive, and the dancer roll that closes the loop.25 min
- 03Power quality: the harmonics a drive drawsWhy a six-pulse drive draws 6k ± 1 harmonics (eq. 6.3), what they do to the supply and to transformers, where IEEE 519 applies, and how to choose between a reactor, a 12-pulse front end, a filter and an active front end.30 min
- 04Cables, bearings and protection around the driveVoltage reflection on long motor cables and the critical length (eq. 6.4), bearing currents, and how protection must be coordinated for a drive rather than a direct-on-line motor.30 min
- 05Availability, redundancy and commissioningAvailability from MTBF and MTTR (eq. 6.5), why repair time is the cheaper lever, where redundancy is justified, and the order of commissioning from FAT to safety validation.25 min
- 06The mini-project: from requirement to defended designThe capstone methodology (specification, control philosophy, sizing, simulation, defence), the three project workshops, the marking rubric, suggested themes, and the mistakes the rubric punishes.25 min