C-2. Design for applications with different duties
Design drive system for the three conveyors with different duties (a) duty 100%, (b) 70%, (c) 50%. Duty cycle period – 1 min.
Available information:
- One drum to be driven
- Rated torque 50 kNm
- Speeds: min – 75 rpm, max -150 rpm
- No overloads
- Air-conditioned clean power house, abundant heat removal capability
- Grid 400 V
- Distance of conveyor from FC (cable length) – 40 m
- Cooling water not available
Use helical gearbox with ratio 1:5.
Summarize the data in a table like the one below. Explain the results.
| Case | Duty | Motor type | FC type | Cost motor | Cost FC | Cost total |
|---|---|---|---|---|---|---|
| 1 | 100% | |||||
| 2 | 70% | |||||
| 3 | 50% |