CH6
Chapter 6 · Case studies and the mini-project
The booklet's Chapter 6 tutorials are project workshops, with no worked exercises. These exercises follow the course's worked examples: mill reversal, kiln inching, winder range, harmonics, cable length, availability and annual energy (Lab VI).
7 exercises
- 01Regenerated energy per mill reversalThe flywheel energy a reversing mill returns at each pass (eq. 6.1), and the power it represents. · 2 questionsCourse §6.1.1Not started
- 02Why a kiln needs an inching driveHow slowly the auxiliary drive turns the kiln, how small it can be, and why it exists. · 3 questionsCourse §6.1.2Not started
- 03Torque and speed range of a winderThe winder law (eq. 6.2) at the core and at the full roll, and the constant-power range it asks of the drive. · 5 questionsCourse §6.1.4Not started
- 04Drive harmonics and IEEE 519Which orders a six-pulse and a 12-pulse front end draw, and where and how strictly the limit applies. · 4 questionsCourse §6.2.1Not started
- 05Critical motor-cable lengthThe cable length beyond which a PWM edge doubles at the motor (eq. 6.4), and the voltage the winding then sees. · 3 questionsCourse §6.2.2Not started
- 06Repair time against failure rateDowntime from eq. 6.5, and whether it is better to halve the repair time or double the time between failures. · 3 questionsCourse §6.2.4Not started
- 07Annual saving from a load duration curveWeighting each operating point by its hours, against the rated-point shortcut. · 2 questionsCourse §6.3Not started