Electrical Machines
Generator Efficiency
\eta_{gen}\% = (P_{electrical} / P_{mechanical}) \times 100
Variables
| ηgen% | Generator efficiency | % |
| Pelectrical | Electrical output | kW |
| Pmechanical | Mechanical input from turbine shaft | kW |
Engineering Example
A generator producing 1650 kW electrical from 1700 kW shaft input: η = 1650/1700×100 ≈ 97.1%.
Practical Site Example
Combined with turbine efficiency to get the plant's overall conversion efficiency.