The formula to calculate the Starting Torque (τ) is:
\[ \tau = \frac{3E^2R}{2\pi N_s (R^2 + X^2)} \]
Torque is defined as a measure of the force that causes the rotor of an electrical machine to rotate about an axis. EMF is defined as the electro motive force which is needed to move the electrons within an electrical conductor to generate flow of current through the conductor. Resistance is a measure of the opposition to current flow in an electrical circuit. Synchronous speed is a definite speed for an alternating-current machine that is dependent on the frequency of the supply circuit. Reactance is defined as the opposition to the flow of current from a circuit element due to its inductance and capacitance.
Let's assume the following values:
Using the formula:
\[ \tau = \frac{3 \cdot 305.8^2 \cdot 14.25}{2 \cdot \pi \cdot 1639.91136509036 \cdot (14.25^2 + 75^2)} \approx 0.0665712385000092 \]
The Starting Torque is approximately 0.0665712385000092 Nm.
| EMF (V) | Resistance (Ω) | Synchronous Speed (rad/s) | Reactance (Ω) | Torque (Nm) |
|---|---|---|---|---|
| 300 | 14.25 | 1639.9113650904 | 75 | 0.06406992033463 |
| 301 | 14.25 | 1639.9113650904 | 75 | 0.06449776502486 |
| 302 | 14.25 | 1639.9113650904 | 75 | 0.06492703349110 |
| 303 | 14.25 | 1639.9113650904 | 75 | 0.06535772573335 |
| 304 | 14.25 | 1639.9113650904 | 75 | 0.06578984175161 |
| 305 | 14.25 | 1639.9113650904 | 75 | 0.06622338154587 |
| 306 | 14.25 | 1639.9113650904 | 75 | 0.06665834511614 |
| 307 | 14.25 | 1639.9113650904 | 75 | 0.06709473246242 |
| 308 | 14.25 | 1639.9113650904 | 75 | 0.06753254358471 |
| 309 | 14.25 | 1639.9113650904 | 75 | 0.06797177848300 |
| 310 | 14.25 | 1639.9113650904 | 75 | 0.06841243715731 |