FieldengMechanical & Motion
Shaft Power
Mechanical shaft power from torque and rotational speed.
Mechanical & Motion
Mechanical shaft power from torque and rotational speed.
App id: MECH-03. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
P = τωInputs
| Name | Unit |
|---|---|
| Shaft torque | N-m |
| Rotational speed | rpm |
| Measured power (optional) | kW |
Outputs
| Name | Unit |
|---|---|
| Shaft power (hero result) | kW |
| Angular velocity | rad/s |
Diagnose
Observations are context. They do not pass or fail a structure. See Diagnose.
| When | Observation | Severity |
|---|---|---|
Shaft power < 0 | Reverse power flow | info |
frequency hz < 10 | Very low rotational speed | caution |
frequency hz > 20000 | Very high rotational speed | caution |
ratio ≤ 0.95 and ratio < 1.05 | Power balance inconsistent | caution |
Assumptions
- Torque is shaft torque at the stated speed.
Provenance
- P = τω on the same shaft.